Snip 2.06 04 82 updated edition. Snip design of internal water supply and sewerage systems of buildings

BUILDING REGULATIONS

LOADS AND IMPACTS ON HYDRAULIC STRUCTURES (WAVE, ICE AND FROM SHIPS)

SNiP 2.06.04-82*

GOSSTROY USSR

Moscow 1989

DEVELOPED BY VNIIG im. B. E. Vedeneeva Ministry of Energy of the USSR (Doctor of Technical Sciences D.D. Leppo - scientific supervisor and editor of works; Candidate of Technical Sciences A.P. Pak - topic leader; Candidates of Technical Sciences L.B. Pevzner and I.N. Shatalina; I.Ya. Popov and O.S. Naumov) with the participation of organizations of the Ministry of Defense (Doctors of Technical Sciences P.P. Kulmach and A.M. Zhukovets; Candidates of Technical Sciences B.V. Balashov, N O. G. Zaritovsky, N. N. Zagryadskaya, V. V. Kaplun and S. S. Mishchenko); Soyuzmorniiproekt of the Ministry of Marine Fleet (Doctor of Physical and Mathematical Sciences Yu. M. Krylov, Candidate of Physical and Mathematical Sciences S.S. Strekalov, Candidate of Technical Sciences I.B. Tishkin); Institute of Water Problems of the USSR Academy of Sciences (candidate of technical sciences G.F. Krasnozhon); State Oceanographic Institute of the State Committee for Hydrometeorology (Doctor of Physical and Mathematical Sciences G.V. Matushevsky); MISS them. V.V. Kuibyshev Ministry of Higher Education of the USSR (Doctor of Technical Sciences G.N. Smirnov, Candidate of Technical Sciences I.Sh. Khalfin); Leningrad Institute of Water Transport of the Ministry of River Fleet of the RSFSR (Doctor of Technical Sciences V.K. Shtenzel); TsNIIS Ministry of Transport (Doctor of Technical Sciences A.I. Kuznetsov, Candidates of Technical Sciences G.D. Khakhachikh, L.A. Morozov); NIIZhT MPS (Doctor of Technical Sciences K.N. Korzhavin) and the Gipromorneftegaz Institute (Candidates of Technical Sciences M.F. Kurbanov and V.G. Sarkisov) and VNIPI Morneftegae (Doctor of Physical and Mathematical Sciences S.A. Vershinin) Mingazprom.

INTRODUCED by the USSR Ministry of Energy.

PREPARED FOR APPROVAL by the Department of Technical Regulation and Standardization of the USSR State Construction Committee ( V.A. Kulinichev).

SNiP 2.06.04-82* is a reissue of SNiP 2.06.04-82 with amendment No. 1, approved by Decree of the USSR State Construction Committee dated March 12, 1986 No. 27.

When using a regulatory document, you should take into account the approved changes to building codes and rules and state standards published in the journal "Bulletin of Construction Equipment", "Collection of Amendments to Construction Codes and Rules" of the USSR State Construction Committee and the information index "State Standards of the USSR Gosstandart".

Approval of change No. 2 SNiP 2.06.04—82* "Loads and impacts on hydraulic structures (wave, ice and from ships)"

Decree of the USSR State Construction Committee dated October 10, 1988 No. 208 was approved and put into effect on January 1, 1989. Developed by VNIIG named after. B.E. Vedeneev Ministry of Energy of the USSR the following change No. 2 SNiP 2.06.04-82 “Loads and impacts on hydraulic structures (wave, ice and from ships)”, approved by Decree of the USSR State Construction Committee dated June 15, 1982 No. 161.

Clause 6* of Appendix 1 shall be stated in a new edition:

"6*. The height of the wind car, m, should be taken according to field observations, and in their absence (without taking into account the configuration of the coastline and at a constant bottom depth d) can be determined using the formula

, (148*)

where a w is the angle between the longitudinal axis of the reservoir and the wind direction, degrees;

Vw- estimated wind speed, determined by r. 9*;

L- acceleration, m.

Kw- coefficient accepted according to the table. 2*

Table 2*

Vw
Kw. 10 6

These standards apply to river and sea hydraulic structures when designing newly built and reconstructing existing facilities.

The standards establish standard values for loads and impacts from waves, ice and ships on hydraulic structures. The design load should be determined as the product of the standard load and the safety factor for loads g f, taking into account possible deviation of the load in an unfavorable direction from its standard value; g f must be accepted in accordance with the requirements given in the SNiP chapter on the basic provisions for the design of river hydraulic structures.

Loads from waves and ice on class I hydraulic structures, as well as design elements of waves in open and protected water areas, must be clarified on the basis of field observations and laboratory studies.

1. LOADS AND IMPACTS OF WAVES ON HYDRAULIC STRUCTURES OF VERTICAL AND SLOPE PROFILES

LOADS FROM STANDING WAVES ON VERTICAL PROFILE STRUCTURES

1.1. Calculation of structures for the impact of standing waves from the open water area (Fig. 1) should be carried out at a depth to the bottom d b>1,25h; Moreover, in the formulas for the free wave surface and wave pressure, instead of the depth to the bottom d b, m, it is necessary to use a conditional design depth d, m, determined by the formula

, (1)

Where d f- depth above the base of the structure, m;

k br- coefficient accepted according to the graphs in Fig. 2;

h- height of the traveling wave, m, accepted according to Appendix 1.

Fig.1. Diagrams of the pressure of standing waves on a vertical wall from the side of an open water area

a - at the crest of a wave; b - At a wave trough (with diagrams of the weighing wave pressure on the berm masses)

Rice. 2. Graphs of the coefficient value k br

1.2. Elevation or decrease of the free wave surface h, m, near a vertical wall, measured from the design water level, should be determined by the formula

, (2)

Circular wave frequency;

Average wave period, s;

t- time, s;

l - average wavelength, m.

When a standing wave acts on a vertical wall, it is necessary to provide for three cases of determination h according to formula (2) for the following values of cos w t:

a) cos w t = 1 - when approaching the wall of the top of the wave, rising above the calculated level by hmax, m;

b) 1> cos w t > 0 - at the maximum value of the horizontal linear wave load R x s , kN/m, for a wave crest rising above the design level by h s, in this case the value of cos w t should be determined by the formula

, (3)

c) cos w t = -1 - at the maximum value of the horizontal linear wave load R xt ,kN/m, for the wave base located below the design level at h t.

Note. In and in all other cases, when according to formula (3) the value of cos w t > 1, it is necessary to take cos w t = 1 in future calculations.

1.3. In the deep-water zone, horizontal linear load on a vertical wall P x, kN/m, with a crest or trough of a standing wave (see Fig. 1) must be taken from the wave pressure diagram, and the value R, kPa, at depth z, m, should be determined by the formula

Where r— density of water, t/m3;

g- free fall acceleration equal to 9.81 m/s 2 ;

z- coordinates of points ( z 1 = h c , z 2 = 0 , ... z n =d), m, measured from the calculated level.

For the ridge at z 1 = h c, and for the trough at z 6 = 0, should be accepted p= 0 .

1.4. In the shallow water zone, the horizontal linear load on the vertical wall P x,. kN/m, with the crest and trough of a standing wave (see Fig. 1), it is necessary to take the wave pressure diagram, and the value R, kPa, at depth z, m, should be determined from the table. 1.

Table 1

No. of points	Deepening points z, m	Wave pressure value
at the ridge
	h c	p 1 = 0
		p2 = k 2 rgh
	0 ,25d	p 3 = k 3 rgh
	0,5d	p 4 = k 4 rgh
	d	p5 = k 5 rgh
in a hollow
		p 6 = 0
	h t	p7 = - r g h t
	0,5d	p 8 = -k 8 rgh
	d	p 9 = -k 9 rgh
Note. Coefficient values to 2, to 3, to 4, to 5, to 6, to 8, to 9 should be taken according to the graphs in Fig. 3, 4, 5.

Rice. 3. Graphs of coefficient values k 2 And k 3

Rice. 4. Graphs of coefficient values k 4 And k 5

Rice. 5. Graphs of coefficient values k 8 And k 9

LOADS AND IMPACTS OF WAVES ON VERTICAL PROFILE STRUCTURES AND THEIR ELEMENTS (SPECIAL CASES)

1.5*. Wave pressure R, kPa, on a vertical wall with an elevation above the design level of the top of the structure z sup, m, less than hmax, m, should be determined in accordance with clauses 1.3 and 1.4, followed by multiplying the obtained pressure values by the coefficient to s, determined by the formula

, (5)

where the plus and minus signs correspond to the position of the top of the structure above or below the calculated water level.

Raising or lowering the free wave surface h, determined according to clause 1.2, should also be multiplied by the coefficient to s.

Horizontal linear wave load P xc, kN/m, in the case under consideration should be determined by the area of the wave pressure diagram within the height of the vertical wall.

1.6. When the wave front approaches the structure at an angle a, hail, from the side of the open water area (in calculations of the stability of the structure and the strength of the foundation soils), the linear wave load on the vertical wall, determined in accordance with paragraphs 1.3 and 1.4, must be reduced by multiplying it by the coefficient k cs, taken equal to:

a, hail	k cs

Note. When the wave front moves along the wall, i.e. For a, close to or equal to 90 degrees, the wave load should be determined in accordance with clause 1.7.

1.7. The horizontal load from diffracted waves from the side of the fenced water area should be determined based on the relative length of the structure section; in this case, the calculated diagram of the wave pressure with the values R, kPa, can be performed at three points, considering the following cases:

a) the top of the wave is aligned with the middle of the structure section (Fig. 6, a):

b) the base of the wave is aligned with the middle of the structure section (Fig. 6, b):

z 1=0, p 1 = 0 ; (9)

Where h dif- height of the diffracted wave, m, determined according to the mandatory app. 1;

k l- coefficient accepted according to the table. 2.

Fig.6. Diagrams of the pressure of diffracted waves on a vertical wall from the side of the fenced water area

a - at the crest of a wave; b - at a wave trough

table 2

Relative section length
Coefficient, k l	0.98	0,92	0,85	0.76	0,64	0,51	0,38	0.26
Note. At depth on the side of the enclosed water area, a triangular diagram of wave pressure should be constructed, taking the wave pressure equal to zero at depth (see Fig. 6).

1.8. The weighing wave pressure in the horizontal joints of solid masonry and along the base of the structure should be taken equal to the corresponding values of the horizontal wave pressure at the extreme points (see Fig. 1 and 6) with a linear change within the width of the structure.

1.9. Maximum bottom speed v b,max, m/s, in front of a vertical wall (from the action of standing waves) at a distance of 0.25 from the front edge of the wall must be determined by the formula

(12)

Where k sl- coefficient accepted according to the table. 3.

Table 3

Flatness of the wave
Coefficient k sl			0,75

Allowable values of non-erosive bottom velocities v b,adm, m/s, for soil size fractions D, mm, should be taken according to Fig. 7; at v b,max> v b,adm it is necessary to provide protection against erosion of the base.

Fig.7. Graph of permissible values of non-erosive bottom velocities

1.10. The diagram of the weighing wave pressure on the berm masses should be taken as trapezoidal, according to Fig. 1, b, with ordinates p br,i, kPa, determined (at i= 1, 2 or 3) according to the formula

, (13)

Where x i- distance from the wall to the corresponding face of the array, m;

k br- coefficient accepted according to Table 4;

pf- wave pressure at the level of the base of the structure.

Table 4

Relative depth	Coefficient k brflat waves
	15 or less	20 or more
Less than 0.27	0,86	0,64
From 0.27 to 0.32		0,44
More than 0.32

LOADS FROM BREAKING AND BREAKING WAVES ON VERTICAL PROFILE STRUCTURES

1.11. Calculation of structures for the impact of breaking waves from the open water area should be carried out at a depth above the berm dbr< 1,25h and depth to the bottom (Fig. 8).

Fig.8. Diagrams of the pressure of breaking waves on a vertical wall

P xc, kN/m, from breaking waves it is necessary to take diagrams of lateral wave pressure over the area, while the values R, kPa, for ordinate values z, m, should be determined by the formulas:

z 1 = -h, p 1 = 0; (14)

z 2 = 0, p 2 = 1,5 rgh; (15)

z 3 = df, . (16)

P z s, kN/m, from breaking waves should be taken equal to the area of the diagram of the weighing wave pressure and determined by the formula

where m is the coefficient taken according to the table. 5.

Table 5

Maximum water speed vf,max, m/s, above the surface of the berm in front of a vertical wall with breaking waves must be determined by the formula

(18)

1.12. Calculation of structures for the impact of breaking waves from the open water area should be carried out at depth d b £ d cr on a section of the bottom adjacent to the wall with a length of at least 0.5 m (Fig. 9), while the elevation of the top of the maximum breaking wave h c,sur, m, above the calculated level should be determined by the formula

h c,sur= -0,5d f - h sur, (19)

Where hsur- breaking wave height, m;

d cr- critical depth, m.

Fig.9. Diagrams of surf pressure on a vertical wall

a - with the top of the bed at the bottom level; b - with a bed rising above the bottom

Horizontal linear load P xc, kN/m, from breaking waves it is necessary to take diagrams of lateral wave pressure over the area, while the values R, kPa, for ordinate values z, m, should be determined by the formulas:

z 1 = -hsur, p 1 = 0; (20)

, p2 = 1,5 r gh sur; (21)

z 3 = d f, , (22)

where is the average length of the breaking wave, m.

Vertical linear load P zc, kN/m, from breaking waves should be taken equal to the area of the diagram of the weighing wave pressure (with height p 3) and determined by the formula:

Maximum bottom speed of a breaking wave v b, max, m/s, in front of the vertical wall on the side of the open water area should be determined by the formula:

, (24)

1.13. Determination of loads on a vertical wall from the impact of breaking and breaking waves (see Fig. 8 and 9), with proper justification, can be carried out using dynamic methods that take into account pressure pulses and inertial forces.

LOADS AND IMPACTS OF WAVES ON SCOPE PROFILE STRUCTURES

1.14*. The height of the wave run-up on the slope is guaranteed to be 1% along the run-up ( h run1%, m) for frontally approaching waves at depth in front of the structure d³ 2 h 1% should be determined by the formula

h run1% = k r k p k sp k run h 1% , (25)

Where k r And k p- coefficients of roughness and permeability of the slope, taken according to Table 6;

k sp- coefficient accepted according to the table. 7*;

k run- coefficient taken from the graphs in Fig. 10* depending on the flatness of the wave in deep water.

At depth in front of the structure d < 2h 1% coefficient k run must be taken for the wave flatness values indicated in Fig. 10* in brackets and determined at depth d = 2h 1% .

The height of the wave run-up on the slope of security i, %, by roll-up must be determined by multiplying the value obtained by formula (25) h run1%, m, by coefficient k i accepted according to Table 8.

Table 6

Slope fastening design	Relative roughness r/h 1%	Coefficient, k r	Coefficient, k p
Concrete (reinforced concrete) slabs
Gravel - pebble, stone	Less than 0.002
or fastening with concrete	0,005-0,01	0,95	0,85
(reinforced concrete) blocks	0,02
	0,05
		0,75
	More than 0.2
Note. Characteristic size of roughness r, m, should be taken equal to the average grain diameter of the slope fastening material or the average size of concrete (reinforced concrete) blocks.

Table 7*

Meaning ctg j	1 - 2	3 - 5	More than 5
Coefficient k sp at wind speed V w , m/s:
20 or more

5 or less
Note. j- angle of inclination of the slope to the horizon, degrees.

Table 8

Availability by roll-on i, %
Coefficient k i			0,96	0,91	0,86	0,76	0,68

Rice. 10*. Graphs of coefficient values k run

When the wave front approaches the structure at an angle a, hail, from the side of the open water area, the magnitude of the wave run-up onto the slope should be reduced by multiplying by the coefficient k a, taken according to Table 9.

Table 9

Angle value a, hail
Coefficient k a		0,98	0,96	0,92	0,87	0,82	0,76

Note. When determining the height of wave roll-up on sandy and gravel-pebble beaches, it is necessary to take into account the change in the slope of the beach during a storm. The greatest depression of the beach at the water's edge should be taken equal to 0.3 h, m, with wedging out to zero values on the shore to the height of the greatest run-up, and in the sea to the depth d = d cr, m, for eroded soils or at depth d= d cr, u, m, - for non-erodible soils (where h, d cr And d cr, u- wave height and water depth at the first and last collapse sites, respectively, m).

1.15. Diagram of wave pressure on a slope at 1.5 £ ctg j£ 5, reinforced with monolithic or prefabricated slabs, should be taken according to Fig. 11, with the maximum design wave pressure p d, kPa, must be determined by the formula:

p d = k s k f p rel rgh, (26)

Where k s- coefficient determined by the formula

1,15

1,35

1,48

Table 11

Wave height h, m

³ 4

Maximum relative wave pressure p rel

In the fastening areas along the slope above and below point 2 (see Fig. 11), the values of the ordinates of the wave pressure diagram should be taken R, kPa, at distances, m:

at l 1 = 0,0125L j And l 3 = 0,0265L j p = 0,4p d ;

at l 2 = 0,0325L j And l 4 = 0,0675L j p = 0, 1p d,

Where . (31)

Ordinates of the wave backpressure diagram p c, kPa, on slope fastening slabs should be determined by the formula:

p c = k s k f p c,rel r gh, (32)

Where p c,rel- relative wave backpressure,

Fig. 12. Graphs for determining relative wave backpressure

1.16. The load from waves on a slope reinforced with slabs for buildings of class I and II with a wave height of more than 1.5 m with a probability of 1% in the system is allowed, with proper justification, to be determined by methods that take into account the irregularity of wind waves.

In the presence of berms and variable slopes of individual sections of slope profile structures, loads from waves on slope fastenings must be determined based on laboratory research data.

1.17*. When designing slope profile structures and slope fastenings made of broken stone, ordinary and shaped concrete or reinforced concrete blocks, the mass of an individual element m or m z, t, corresponding to the state of its limiting equilibrium from the action of wind waves, it is necessary to determine:

when placing a stone or block on the slope section from the top of the structure to the depth z = 0,7h according to the formula

; (33)*

the same, for z > 0.7 h according to the formula

Where k fr- coefficient accepted according to Table 12*; at > 15, as well as in the presence of a berm k fr should be clarified based on experimental data;

p m- stone density, t/m3.

Table 12*

Fastening elements	Coefficient k fr
	when sketching	when laying
Stone	0,025
Ordinary concrete blocks	0,021
Tetrapods and other shaped blocks	0,008	0,006

BUILDING REGULATIONS

Loads and impacts on hydraulic structures (wave, ice and from ships) SNiP 2.06.04-82*

GOSSTROY USSR

Moscow 1989

DEVELOPED BY VNIIG im. B. E. Vedeneeva Ministry of Energy of the USSR (Doctor of Technical Sciences D.D. Leppo - scientific supervisor and editor of works; Candidate of Technical Sciences A.P. Pak - topic leader; Candidates of Technical Sciences L.B. Pevzner and I.N. Shatalina; I.Ya. Popov and O.S. Naumov) with the participation of organizations of the Ministry of Defense (Doctors of Technical Sciences P.P. Kulmach and A.M. Zhukovets; Candidates of Technical Sciences B.V. Balashov, N O. G. Zaritovsky, N. N. Zagryadskaya, V. V. Kaplun and S. S. Mishchenko); Soyuzmorniiproekt of the Ministry of Marine Fleet (Doctor of Physical and Mathematical Sciences Yu. M. Krylov, Candidate of Physical and Mathematical Sciences S.S. Strekalov, Candidate of Technical Sciences I.B. Tishkin); Institute of Water Problems of the USSR Academy of Sciences (candidate of technical sciences G.F. Krasnozhon); State Oceanographic Institute of the State Committee for Hydrometeorology (Doctor of Physical and Mathematical Sciences G.V. Matushevsky); MISS them. V.V. Kuibyshev Ministry of Higher Education of the USSR (Doctor of Technical Sciences G.N. Smirnov, Candidate of Technical Sciences I.Sh. Khalfin); Leningrad Institute of Water Transport of the Ministry of River Fleet of the RSFSR (Doctor of Technical Sciences V.K. Shtenzel); TsNIIS Ministry of Transport (Doctor of Technical Sciences A.I. Kuznetsov, Candidates of Technical Sciences G.D. Khashachikh, L.A. Morozov ); NIIZhT MPS (Doctor of Technical Sciences K.N. Korzhavin) and the Gipromorneftegaz Institute (Candidates of Technical Sciences M.F. Kurbanov and V.G. Sarkisov) and VNIPI Morneftegae (Doctor of Physical and Mathematical Sciences S. A Vershinin) Mingazprom.

INTRODUCED by the USSR Ministry of Energy.

PREPARED FOR APPROVAL by the Department of Technical Regulation and Standardization of the USSR State Construction Committee ( V.A. Kulinichev).

SNiP 2.06.04-82*is a reissue of SNiP 2.06.04-82 with amendment No. 1, approved by the resolution of the USSR State Construction Committee dated March 12, 1986. No. 27.

When using a regulatory document, you should take into account the approved changes to building codes and regulations and state standards published in the journal "Bulletin of Construction Equipment", "Collection of Amendments to Building Codes and Rules" of the USSR State Construction Committee and the information index "GosudArstvennesstandards of the USSR Gosstandart".

Change approval № 2 SNiP 2.06.04-82 * "Loads and impacts on hydraulic structures (wave, ice and from ships)"

Decree of the USSR State Construction Committee dated October 10, 1988 No. 208 was approved and put into effect on January 1, 1989. Developed by VNIIG named after. B.E. Vedeneev Ministry of Energy of the USSR, the following change No. 2SNiP 2.06.04-82 “Loads and impacts on hydraulic structures (wave, ice and from ships)”, approved by Decree of the USSR State Construction Committee dated June 15, 1982 No. 161.

Clause 6*of Appendix 1 shall be stated in a new edition:

, (148*)

wherea w is the angle between the longitudinal axis of the reservoir and the wind direction, degrees;

V w- estimated wind speed, determined by r. 9*;

L- acceleration, m.

K w - coefficient accepted according to the table. 2*

Table 2*

These standards apply to river and sea hydraulic structures when designing newly constructed and reconstructing existing facilities.

The standards establish standard values for loads and impacts from waves, ice and ships on hydraulic structures. The design load should be determined as the product of the standard load and the load safety factor g f, taking into account possible deviation of the load in an unfavorable direction from its standard value; g f must be accepted in accordance with the requirements given in the SNiP chapter on the basic provisions for the design of river hydraulic structures.

USSR STATE COMMITTEE FOR CONSTRUCTION

BUILDING REGULATIONS

Internal water supply and sewerage of buildings SNiP 2.04.01-85*

DEVELOPED BY GPI Santekhproekt of the State Construction Committee of the USSR (Yu. N. Sargin), TsNIIEP of engineering equipment of the State Civil Engineering Committee (Candidate of Technical Sciences L. A. Shopensky), MNIITEP GlavAPU of the Moscow City Executive Committee (Candidate of Technical Sciences N. N. Chistyakov; I. B. Pokrovskaya ), Donetsk Industrial Construction Project of the State Construction Committee of the USSR (E. M. Zaitseva), SKTB Rostrubplast of the Roskolkhozstroyobedinenie (Candidate of Technical Sciences A. Ya. Dobromyslov), Research Institute Mosstroy (Candidate of Technical Sciences Ya. B. Alesker), NPO "Stroypolymer" ( Prof. V.S. Romeiko, V.A. Ustyugov), MGSU (Prof. V.N. Isaev), Mosvodokanalproekt (A.S. Verbitsky).

PREPARED FOR APPROVAL BY Glavtekhnormirovanie Gosstroy USSR (Gosstroy USSR) - B.V. Tambovtsev, V.A. Glukharev.

AGREED BY THE USSR Ministry of Health, GUPO USSR Ministry of Internal Affairs.

SNiP 2.04.01-85* is a reissue of SNiP 2.04.01-85 with amendments No. 1, 2, approved by Decree of the USSR State Construction Committee of November 28, 1991 No. 20, dated July 11, 1996 No. 18-46 and amendments introduced by letter State Construction Committee of the USSR dated May 6, 1987 No. ACh-2358-8.

Items and tables to which changes have been made are marked in these building codes and regulations with an asterisk.

When using a regulatory document, you should take into account the approved changes to building codes and regulations and state standards published in the journal “Bulletin of Construction Technology” and the information index “State Standards”.

1. General Provisions

1.1 .These standards apply to the design of internal cold and hot water supply, sewerage and drainage systems under construction and reconstruction. .

1.2. When designing systems for internal cold and hot water supply, sewerage and drains, it is necessary to comply with the requirements of other regulatory documents approved or agreed upon by the Ministry of Construction of Russia.

1 . 3. These standards do not apply to the design of:

fire-fighting water supply systems of enterprises producing or storing explosive, flammable and combustible substances, as well as other facilities, the requirements for the internal fire-fighting water supply of which are established by the relevant regulatory documents;

heating points;

hot water supply systems that supply water for the technological needs of industrial enterprises (including medical procedures) and water supply systems within technological equipment;

special industrial water supply systems (deionized water, deep cooling, etc.).

1.4. Internal water supply is a system of pipelines and devices that provides water supply to sanitary fixtures, fire hydrants and technological equipment, serving one building or a group of buildings and structures and having a common water measuring device from the water supply network of a settlement or industrial enterprise.

In the case of supplying water from the system for external fire extinguishing, the design of pipelines laid outside buildings must be carried out in accordance with SNiP 2.04.02-84*.

Internal sewerage - a system of pipelines and devices in a volume limited by the outer surfaces of enclosing structures and outlets up to the first inspection well, ensuring the removal of wastewater from sanitary fixtures and technological equipment and, if necessary, local treatment facilities, as well as rain and melt water into the sewerage network appropriate purpose of a settlement or industrial enterprise.

Notes: 1. Hot water preparation should be provided at installations in accordance with the instructions for the design of heating points and heating units.

2. Local wastewater treatment plants should be designed in accordance with SNiP 2.04.03-85 and departmental building codes.

1.5. In all types of buildings erected in sewer areas, internal water supply and sewerage systems should be provided.

In non-sewered areas of populated areas, internal water supply and sewerage systems with the installation of local sewerage treatment facilities must be provided in residential buildings over two floors high, and hotels. nursing homes (in rural areas), hospitals, maternity hospitals, clinics, outpatient clinics, dispensaries, sanitary and epidemiological stations, sanatoriums, rest homes, boarding houses, pioneer camps, nurseries, boarding schools, educational institutions, secondary schools, cinemas, clubs , catering establishments, sports facilities, bathhouses and laundries.

Notes: 1.In production and auxiliary buildings, internal water supply and sewerage systems may not be provided in cases where the enterprise does not have a centralized water supply and the number of employees is no more than 25 people. per shift.

2. In buildings equipped with internal drinking or industrial water supply, it is necessary to provide an internal sewerage system.

1.6. In non-sewered areas of settlements, it is allowed to equip the following buildings (structures) with backlash closets or cesspools (without installing water supply inlets):

production and auxiliary buildings of industrial enterprises with up to 25 employees. per shift;

residential buildings 1-2 floors high;

dormitories with a height of 1-2 floors for no more than 50 people;

pioneer camps with no more than 240 seats, used only in the summer;

Type I clubs;

open planar sports facilities;

catering establishments with no more than 25 seats.

Note. Backlash closets may be provided when designing buildings for climatic regions I-III.

1.7 . The need to install internal drains is established by the architectural and construction part of the project.

1.8. Pipes, fittings, equipment and materials used in the installation of internal systems of cold and hot water supply, sewerage and drains must comply with the requirements of these norms, state standards, norms and technical specifications approved in the prescribed manner.

When transporting and storing drinking water, you should use pipes, materials and anti-corrosion coatings approved by the Main Sanitary and Epidemiological Supervision Authority of Russia for use in domestic drinking water supply practice.

1.9. The main technical decisions taken in projects and the order of their implementation must be justified by comparing the indicators of possible options. Technical and economic calculations should be performed for those options whose advantages (disadvantages) cannot be established without calculation.

The optimal calculation option is determined by the lowest value of the reduced costs, taking into account the reduction in the consumption of material resources, labor costs, electricity and fuel.

1.10. When designing, it is necessary to provide for the use of progressive technical solutions and work methods: mechanization of labor-intensive work, automation of technological processes and maximum industrialization of construction and installation work through the use of prefabricated structures, standard and standard products and parts manufactured in factories and procurement workshops.

1.11. The main letter designations adopted in these standards are given in the mandatory Appendix 1.

UPDATED EDITION OF SNIP 2.04.01-85*

Domestic water supply and drainage systems in buildings

SP 30.13330.2012

OKS 91.140.60,
OKS 91.140.80

Preface

The goals and principles of standardization in the Russian Federation are established by the Federal Law of December 27, 2002 N 184-FZ “On Technical Regulation”, and the development rules are established by the Decree of the Government of the Russian Federation of November 19, 2008 N 858 “On the procedure for the development and approval of sets of rules ".

Rulebook Details

1. Executors - OJSC SantekhNIIproekt, OJSC Scientific Research Center Construction.
2. Introduced by the Technical Committee for Standardization TC 465 "Construction".
3. Prepared for approval by the Department of Architecture, Construction and Urban Development Policy.
4. Approved by Order of the Ministry of Regional Development of the Russian Federation (Ministry of Regional Development of Russia) dated December 29, 2011 N 626 and put into effect on January 1, 2013.
5. Registered by the Federal Agency for Technical Regulation and Metrology (Rosstandart). Revision of SP 30.13330.2010 "SNiP 2.04.01-85*. Internal water supply and sewerage of buildings."

Information about changes to this set of rules is published in the annually published information index "National Standards", and the text of changes and amendments is published in the monthly published information index "National Standards". In case of revision (replacement) or cancellation of this set of rules, the corresponding notice will be published in the monthly published information index "National Standards". Relevant information, notices and texts are also posted in the public information system - on the official website of the developer (Ministry of Regional Development of Russia) on the Internet.

Introduction

This set of rules is an updated edition of SNiP 2.04.01-85* “Internal water supply and sewerage of buildings”. The basis for the development of the regulatory document is: Federal Law of December 30, 2009 N 384-FZ “Technical Regulations on the Safety of Buildings and Structures”, Federal Law N 184-FZ “On Technical Regulation”, Federal Law N 261-FZ “On Energy Saving” and on improving energy efficiency."
The updating of SNiP was carried out by a team of authors: OJSC SantekhNIIproekt (candidate of technical sciences A.Ya. Sharipov, engineer T.I. Sadovskaya, engineer E.V. Chirikova), OJSC Mosproekt (engineers E.N. Chernyshev , K.D. Kunitsyna), NP "ABOK" (Doctor of Technical Sciences, Prof. Yu.A. Tabunshchikov, engineer A.N. Kolubkov), JSC "CNS" (engineer V.P. Bovbel) , Chamber of Commerce and Industry of the Russian Federation (engineer A.S. Verbitsky), State Unitary Enterprise "MosvodokanalNIIproekt" (engineer A.L. Lyakmund).

1 area of use

1.1. This set of rules applies to the designed and reconstructed internal systems of cold and hot water supply, sewerage and drains of buildings and structures (hereinafter referred to as buildings) for various purposes with a height of up to 75 meters.
1.2. These rules do not apply to:
for internal fire water supply of buildings and structures;
automatic water fire extinguishing systems;
heating points;
hot water treatment plants;
hot water supply systems that supply water for medical procedures, technological needs of industrial enterprises and water supply systems within technological equipment;
special industrial water supply systems (deionized water, deep cooling, etc.).

This set of rules uses references to the following regulatory documents:
SP 5.13130.2009 Fire protection systems. Fire alarm and fire extinguishing installations are automatic. Design standards and rules
SP 10.13130.2009 Fire protection systems. Internal fire water supply. Fire safety requirements
SP 21.13330.2012 "SNiP 2.01.09-91 Buildings and structures in undermined areas and subsidence soils"
SP 31.13330.2012 "SNiP 2.04.02-84* Water supply. External networks and structures"
SP 32.13330.2012 "SNiP 2.04.03-85 Sewerage. External networks and structures"
SP 54.13330.2011 "SNiP 31-01-2003 Residential multi-apartment buildings"
SP 60.13330.2012 "SNiP 41-01-2003 Heating, ventilation and air conditioning"
SP 61.13330.2012 "SNiP 41-03-2003 Thermal insulation of equipment and pipelines"
SP 73.13330.2012 "SNiP 3.05.01-85 Internal sanitary systems of buildings"
SP 118.13330.2012 "SNiP 31-06-2009 Public buildings and structures"
SP 124.13330.2012 "SNiP 41-02-2003 Heat networks"
GOST 17.1.2.03-90 Nature conservation. Hydrosphere. Criteria and indicators of water quality for irrigation
SanPiN 2.1.4.1074-01 Drinking water. Hygienic requirements for water quality of centralized drinking water supply systems. Quality control. Hygienic requirements for ensuring the safety of hot water supply systems
SanPiN 2.1.4.2496-09 Hygienic requirements for ensuring the safety of hot water supply systems
SanPiN 2.1.2.2645-10 Sanitary and epidemiological requirements for living conditions in residential buildings and premises
SN 2.2.4/2.1.8.562-96 Noise in workplaces, in residential and public buildings and in residential areas
SN 2.2.4/2.1.8.566-96 Industrial vibration, vibration in residential and public buildings.
Note. When using this standard, it is advisable to check the validity of reference standards and classifiers in the public information system - on the official website of the national body of the Russian Federation for standardization on the Internet or according to the annually published information index "National Standards", which was published as of January 1 of the current year, and according to the corresponding monthly information indexes published in the current year. If the reference standard is replaced (changed), then when using this set of rules you should be guided by the replacing (changed) document. If the reference document is canceled without replacement, then the provision in which a reference to it is given applies to the part that does not affect this reference.

3. Terms and definitions

This document uses terms whose definitions are adopted according to the Rules for the Use of Public Water Supply and Sewerage Systems in the Russian Federation, approved, as well as the following terms with corresponding definitions:
3.1. Subscriber: legal entity, as well as entrepreneurs without the formation of a legal entity, who own, have economic management or operational management of objects, water supply and (or) sewerage systems that are directly connected to public water supply and (or) sewerage systems, who have entered into a water supply agreement with the organization sewerage system in accordance with the established procedure, an agreement for the supply (reception) of water and (or) reception (discharge) of wastewater;
3.2. Accident of engineering systems: damage or failure of water supply, sewerage systems or individual structures, equipment, devices, resulting in the cessation or significant reduction in the volume of water consumption and wastewater disposal, the quality of drinking water or causing damage to the environment, property of legal entities or individuals and public health;
3.3. Water consumption balance: the volume of water used per year for drinking, sanitary, fire-fighting, industrial needs and their satisfaction from all sources of water supply, including drinking water supply, recycled water supply, collection and treatment of storm drains, etc.;
3.4. Internal sewerage system (internal sewerage): a system of pipelines and devices within the boundaries of the external contour of a building and structures, limited by outlets to the first inspection well, ensuring the disposal of waste, rain and melt water into the sewerage network of the appropriate destination of the settlement or enterprise;
3.5. Internal water supply system (internal water supply): a system of pipelines and devices that provides water supply to sanitary fixtures, technological equipment and fire hydrants within the boundaries of the external contour of the walls of one building or group of buildings and structures and has a common water-measuring device from the external water supply networks of the populated area point or enterprise. In special natural conditions, the boundary of the internal water supply is calculated from the control well closest to the building (structure);
3.6. Water supply and sewerage devices and structures for connection to water supply and sewerage systems (water supply inlet or sewerage outlet): devices and structures through which the subscriber receives drinking water from the water supply system and (or) discharges wastewater into the sewerage system;
3.7. Water consumption: the use of water by the subscriber (sub-subscriber) to meet their needs;
3.8. Water supply: a technological process that ensures the collection, preparation, transportation and transfer of drinking water to subscribers;
3.9. Water disposal: a technological process that ensures the reception of wastewater from subscribers with its subsequent transfer to sewerage treatment facilities;
3.10. Water supply network: a system of pipelines and structures on them intended for water supply;
3.11. Guaranteed pressure: pressure at the subscriber's inlet, which is guaranteed to be provided by the water supply organization according to technical conditions;
3.12. Sewer network: a system of pipelines, collectors, canals and structures on them for the collection and disposal of wastewater;
3.13. Ventilated sewer riser: a riser that has an exhaust part and through it a connection with the atmosphere, facilitating air exchange in the pipelines of the sewer network;
3.14. Ventilated valve: a device that allows air to pass in one direction - following the liquid moving in the pipeline and does not allow air to pass in the opposite direction;
3.15. Unventilated sewer riser: a riser that has no communication with the atmosphere. Non-ventilated risers include:
a riser that does not have an exhaust part;
riser equipped with a ventilation valve;
a group (at least four) of risers connected at the top by a collection pipeline, without an exhaust part;
3.16. Local treatment facilities: structures and devices designed to treat wastewater from a subscriber (sub-subscriber) before discharge (reception) into the public sewer system or for use in the recycling water supply system;
3.17. Water consumption (wastewater disposal) limit: the maximum volume of supplied (received) drinking water and received (discharged) wastewater for a certain period of time established to the subscriber by technical conditions;
3.18. Organization of water supply and sewerage services ("Vodokanal"): an enterprise (organization) that supplies water from the water supply system and (or) receives wastewater into the sewerage system and operates these systems;
3.19. Drinking water: water after treatment or in its natural state, meeting the hygienic requirements of sanitary standards and intended for drinking and domestic needs of the population and (or) food production;
3.20. Capacity of a device or structure for connection: the ability of a water supply inlet (sewer outlet) to pass the calculated amount of water (wastewater) under a given mode for a certain time;
3.21. Estimated water consumption: consumption standards based on research and operational practice, taking into account the main influencing factors (number of consumers, number of sanitary fixtures, occupancy of apartments in residential buildings, volume of production, etc.);
calculated water consumption and consumption rates cannot be used to determine the actual volume of water consumption and commercial calculations;
3.22. Estimated wastewater costs: justified by research and operational practice, the values of costs predicted for the sewerage facility as a whole or part of it, taking into account influencing factors (number of consumers, number and characteristics of sanitary fixtures and equipment, capacity of drainage pipelines, etc.);
3.23. Permitting documentation: permission to connect to water supply (sewage) systems, issued by local governments in agreement with local services of Rospotrebnadzor, and technical conditions for connection, issued by the water supply and sewerage organization;
3.24. Mode of supply (receipt) of drinking water: guaranteed flow (hourly, second) and free pressure at a given characteristic water consumption for the needs of the subscriber;
3.25. Open hot water collection system: collection of hot water directly from the heating system network;
3.26. Closed hot water system: heating water for hot water supply in heat exchangers and water heaters;
3.27. Recycling water supply system: treatment system in local treatment facilities and reuse of wastewater for economic and technological needs;
3.28. Composition of wastewater: characteristics of wastewater, including a list of pollutants and their concentration;
3.29. Measuring instrument (device): a technical instrument intended for measurements, having standardized metrological characteristics, reproducing and (or) storing a unit of physical quantity, the size of which is assumed unchanged (within the established error) for a certain time interval, and authorized for use for commercial purposes. accounting. According to the design specifications, the device must also have the ability to transmit data remotely;
3.30. Wastewater: water generated as a result of human economic activity (domestic wastewater) and subscribers after using water from all sources of water supply (drinking, technical, hot water supply, steam from heat supply organizations);
3.31. Metering unit for consumed drinking water and discharged wastewater (metering unit): a set of instruments and devices that ensure accounting of the amount of consumed (received) water and discharged (received) wastewater;
3.32. Centralized water supply system: a complex of engineering structures in populated areas for the collection, preparation, transportation and transfer of drinking water to subscribers;
3.33. Centralized sewerage system: a complex of engineering structures in populated areas for collecting, purifying and discharging wastewater into water bodies and treating sewage sludge.

4. General provisions

4.1. Pipelines for water supply systems (including external fire extinguishing) and sewerage systems laid outside buildings must comply with the standards for external water supply and sewerage networks (SP 31.13330 and SP 32.13330).
4.2. The preparation of hot water should be provided in accordance with the standards for heating networks SP 124.13330.
4.3. In buildings of any purpose erected in sewerage areas, internal water supply and sewerage systems should be provided.
The quality of wastewater after treatment in local installations must comply with the technical conditions for receiving it in the external sewerage network and departmental standards.
4.4. In non-sewered areas of populated areas, internal water supply systems with the installation of local apartment and/or collective drinking water purification systems and sewerage systems with the installation of local treatment facilities should be provided in residential buildings with a height of more than two floors, hotels, boarding homes for the disabled and elderly, hospitals, maternity hospitals, clinics, outpatient clinics, dispensaries, sanitary and epidemiological stations, sanatoriums, rest homes, boarding houses, sports and recreational institutions, preschool educational institutions, boarding schools, institutions of primary and secondary vocational education, secondary schools, cinemas, clubs and leisure and entertainment institutions, catering establishments, sports facilities, bathhouses and laundries.
Notes
1. According to the design assignment, it is allowed to install internal water supply and sewerage systems in unsewered areas of populated areas for one- and two-story residential buildings.
2. In production and auxiliary buildings, internal water supply and sewerage systems may not be provided in cases where the enterprise does not have a centralized water supply and the number of employees is no more than 25 people per shift.
3. In buildings equipped with internal drinking or industrial water supply, it is necessary to provide an internal sewage system.

4.5. In non-sewered areas of settlements, in agreement with local authorities of Rospotrebnadzor, it is allowed to equip the following buildings with backlash closets or dry closets (without installing water supply inlets):
production and auxiliary buildings of industrial enterprises with the number of employees up to 25 people per shift;
residential buildings 1 - 2 floors high;
dormitories with a height of 1 - 2 floors for no more than 50 people;
physical education and recreational facilities with no more than 240 seats, used only in the summer;
club and leisure and entertainment institutions;

Notes
1. Backlash closets may be installed in buildings in climatic regions I - III.
2. Methods for disposing of the contents of backlash closets and dry closets are determined by the project according to the technical conditions of local utilities.

4.6. The need to install internal drains is established by the architectural and construction part of the project.
4.7. Pipes, fittings, equipment and materials used in the installation of internal systems of cold and hot water supply, sewerage and drains must comply with the requirements of these norms, national standards, sanitary and epidemiological norms and other documents approved in the prescribed manner.
To transport and store drinking water, pipes, materials and anti-corrosion coatings should be used that have passed sanitary and epidemiological examination and have the appropriate permits and certificates for use in domestic and drinking water supply.

Determination of estimated water and waste flow rates

4.8. For hydraulic calculation of water pipelines and selection of equipment, the following estimated flow rates of hot and cold water should be used:
daily water consumption (total, hot, cold) for the estimated time of water consumption, for which the average hourly consumption is established, m3/day;
maximum hourly water consumption (total, hot, cold), m3/h;
minimum hourly water consumption (total, hot, cold), m3/h;
maximum second water consumption (total, hot, cold), l/s.
Notes
1. The calculated average hourly and maximum second water flow rates should be taken in accordance with Table A.1 of Appendix A.
2. Estimated (specific) annual average daily water consumption in residential buildings per 1 person (l/day) should be taken according to Table A.2 of Appendix A.
3. Estimated (specific) annual average daily water consumption for various consumers (l/day) should be taken according to Table A.3 of Appendix A.

4.9. Estimated water flow rates in cold water pipelines should be determined depending on:
a) specific average hourly water consumption, l/h, related to one consumer or sanitary fixture;
b) the type and total number of water consumers and/or the type and total number of sanitary fixtures (for the water supply system as a whole or for individual sections of the design scheme of the water supply network). If the number of sanitary fixtures (water collection points) is unknown, it is allowed to take the number of fixtures equal to the number of consumers.
4.10. Estimated water flow rates in hot water pipelines should be determined:

ConsultantPlus: note.
There appears to be a typo in the official text of the document: in paragraph 4.2, subparagraphs a) and b) are missing.

for water withdrawal mode - similar to 4.2 a), b) taking into account the residual circulation flow in the areas from the place of heating to the place of the first water withdrawal;
for circulation mode - in thermal-hydraulic calculation.
4.11. For risers of sewerage systems, the calculated flow rate is the maximum second flow rate of wastewater from sanitary fixtures connected to the riser, which does not cause the breakdown of hydraulic valves of any types of sanitary fixtures (wastewater receivers). This flow rate should be determined as the sum of the calculated maximum second flow rate of water from all sanitary fixtures, determined according to Table A.1 of Appendix A, and the calculated maximum second flow rate of flow from the device with maximum water removal (should, as a rule, take the maximum second flow rate of flow from the flush toilet cistern equal to 1.6 l/s).
4.12. For horizontal outlet pipelines of sewerage systems, the design flow rate should be considered the flow rate, the value of which is calculated depending on the number of sanitary fixtures N connected to the design section of the pipeline, and the length of this section of the pipeline L, m, according to the formula

where is the total maximum hourly water flow in the design area, m3/h;
- coefficient accepted according to table 1;
- estimated maximum wastewater flow, l/s, from the device with maximum water removal.

Table 1

Values depending on the number of devices N
and length of the outlet pipeline

N Length of outlet (horizontal) pipeline, m
1 3 5 7 10 15 20 30 40 50 100 500 1000
4 0,61 0,51 0,46 0,43 0,40 0,36 0,34 0,31 0,27 0,25 0,23 0,15 0,13
8 0,63 0,53 0,48 0,45 0,41 0,37 0,35 0,32 0,28 0,26 0,24 0,16 0,13
12 0,64 0,54 0,49 0,46 0,42 0,39 0,36 0,33 0,29 0,26 0,24 0,16 0,14
16 0,65 0,55 0,50 0,47 0,43 0,39 0,37 0,33 0,30 0,27 0,25 0,17 0,14
20 0,66 0,56 0,51 0,48 0,44 0,40 0,38 0,34 0,30 0,28 0,25 0,17 0,14
24 0,67 0,57 0,52 0,48 0,45 0,41 0,38 0,35 0,31 0,28 0,26 0,17 0,15
28 0,68 0,58 0,53 0,49 0,46 0,42 0,39 0,36 0,31 0,29 0,27 0,18 0,15
32 0,68 0,59 0,53 0,50 0,47 0,43 0,40 0,36 0,32 0,30 0,27 0,18 0,15
36 0,69 0,59 0,54 0,51 0,47 0,43 0,40 0,37 0,33 0,30 0,28 0,19 0,16
40 0,70 0,60 0,55 0,52 0,48 0,44 0,41 0,37 0,33 0,31 0,28 0,19 0,16
100 0,77 0,69 0,64 0,60 0,56 0,52 0,49 0,45 0,40 0,37 0,34 0,23 0,20
500 0,95 0,92 0,89 0,88 0,86 0,83 0,81 0,77 0,73 0,70 0,66 0,50 0,44
1000 0,99 0,98 0,97 0,97 0,96 0,95 0,94 0,93 0,91 0,90 0,88 0,77 0,71
Note. The length of the outlet pipeline should be taken
distance from the last riser on the design section to the nearest
connecting the next riser or, in the absence of such connections,
to the nearest sewer well.

5. Plumbing system

5.1. Water quality and temperature in the water supply system
5.1.1. The quality of cold and hot water (sanitary and epidemiological indicators) supplied for household and drinking needs must comply with SanPiN 2.1.4.1074 and SanPiN 2.1.4.2496. The quality of water supplied for production needs is determined by the design specifications (technological requirements).
5.1.2. The temperature of hot water at water supply points must comply with the requirements of SanPiN 2.1.4.1074 and SanPiN 2.1.4.2496 and, regardless of the heat supply system used, must be no lower than 60 °C and no higher than 75 °C.
Note. The requirement of this paragraph does not apply to places of water collection for production (technological) needs, as well as to places of water collection for the needs of service personnel of these institutions.

5.1.3. In the premises of preschool institutions, the temperature of hot water supplied to the water fittings of showers and washbasins should not exceed 37 °C.
5.1.4. The choice of hot water preparation scheme and, if necessary, its treatment should be carried out in accordance with SP 124.13330.
5.1.5. In hot water supply systems of public catering establishments and others, whose consumers require water with a temperature higher than that specified in 5.1.2, additional heating of water should be provided in local water heaters.
5.1.6. In populated areas and enterprises, in order to save potable quality water, with a feasibility study and in agreement with Rospotrebnadzor authorities, it is allowed to supply non-potable quality water to urinals and toilet flush tanks.

5.2. Cold and hot water plumbing systems
5.2.1. Cold water supply systems can be centralized or local. The choice of a building's internal water supply system (centralized or local) should be made depending on sanitary, hygienic and fire safety requirements, production technology requirements, as well as taking into account the adopted external water supply scheme.
A hot water supply system should, as a rule, have a closed water supply with the preparation of hot water in heat exchangers and water heaters (water-water, gas, electric, solar, etc.). According to the design assignment, it is allowed to provide a hot water supply system in the building with an open (directly from the heating network) water supply.
5.2.2. In buildings (structures), depending on their purpose, internal water supply systems should be provided:
household and drinking water;
hot;
fire protection according to 5.3;
negotiable;
production
The fire-fighting water supply system in buildings with drinking water or industrial water supply systems should, as a rule, be combined with one of them, provided that the requirements of SP 10.13130 and this set of rules are met:
utility and drinking water supply with fire-fighting water supply (service and fire-fighting water supply);
industrial water supply with fire-fighting water supply (industrial and fire-fighting water supply);
Networks of cold and hot drinking water supply systems are not allowed to be combined with networks of water supply systems supplying non-potable water.
5.2.3. Internal water supply systems (domestic and drinking, hot water supply, industrial, fire protection) include: inputs to buildings, metering units for cold and hot water consumption, distribution network, risers, connections to sanitary fixtures and technological installations, water supply, mixing, shut-off and control valves . Depending on local conditions and production technology, it is allowed to provide spare (battery) and control tanks in the internal water supply system.
5.2.4. The choice of heating and water treatment scheme for centralized hot water supply systems should be provided in accordance with SP 124.13330.
5.2.5. In centralized hot water supply systems, if it is necessary to maintain the water temperature in places where water is drawn at least as specified in 5.1.2, a hot water circulation system should be provided during the period when water is not drawn.
In hot water supply systems with time-regulated consumption of hot water, hot water circulation may not be provided if its temperature at the water supply points does not drop below that established in 5.1.2.
5.2.6. Heated towel rails installed in bathrooms and shower rooms to maintain a given air temperature in them in accordance with SP 60.13330 and SanPiN 2.1.2.2645 should be connected to the supply pipelines of the hot water supply system or to the consumer's power supply system. When justified, heated towel rails may be connected to the circulation pipes of the hot water supply system, provided that a shut-off valve and a closing section are installed.
5.2.7. In residential and public buildings with a height of more than 4 floors, water risers should be combined by ring jumpers into sectional units with each water outlet connected by one circulation pipeline to the combined circulation pipeline of the system.
From three to seven water risers should be combined into sectional units. Ring jumpers should be laid: in a warm attic, in a cold attic if the pipes are thermally insulated, under the ceiling of the upper floor when supplying water to the water risers from below, or in the basement when supplying water to the risers from above.
5.2.8. In a hot water supply system, connecting water taps to circulation pipelines is not allowed.
5.2.9. Pipelines of hot water supply systems, except for connections to appliances, should be insulated to protect against heat loss. Pipelines of the cold water supply system (except for dead-end fire risers) laid in channels, shafts, sanitary cabins, tunnels, as well as in rooms with high humidity, should be insulated to prevent moisture condensation in accordance with SP 61.13330.
5.2.10. The hydrostatic pressure in the drinking water or fire-fighting water supply system at the level of the lowest located sanitary fixture should be no more than 0.45 MPa (for buildings designed in existing buildings no more than 0.6 MPa), at the level of the highest located devices - according to the passport data of these devices, and in the absence of such data, not less than 0.2 MPa.
In the fire-fighting water supply system, during fire extinguishing, it is allowed to increase the pressure to 0.6 MPa at the level of the lowest located sanitary fixture.
In a two-zone fire-fighting water supply system (in schemes with overhead piping), in which fire risers are used to supply water to the upper floor, the hydrostatic pressure should not exceed 0.9 MPa at the level of the lowest located sanitary fixture.
5.2.11. When the design pressure in the network exceeds the pressure specified in 5.2.10, it is necessary to provide devices (pressure regulators) that reduce the pressure. Pressure regulators installed in the drinking water supply system must provide after themselves the design pressure both in static and dynamic modes of operation of the system. In buildings where the design water pressure of sanitary fixtures, water taps and mixing fittings exceeds the permissible values specified in 5.2.10, the use of fittings with built-in water flow regulators is allowed.

5.3. Fire water systems
5.3.1. For residential, public, as well as administrative buildings of industrial enterprises, as well as for industrial and warehouse buildings, the need to install an internal fire-fighting water supply system, as well as the minimum water consumption for fire extinguishing, should be determined in accordance with the requirements of SP 10.13130.
5.3.2. For integrated fire-fighting water supply systems, the pipeline networks should be taken according to the highest calculated water flow and pressure:
for water consumption needs in accordance with this set of rules;
for fire extinguishing needs in accordance with SP 10.13130.

5.4. Cold and hot water supply networks
5.4.1. Cold water supply networks should be:
dead-end, if a break in the water supply is allowed and the number of fire hydrants is less than 12;
ring or with looped inputs with two dead-end pipelines with branches to consumers from each of them to ensure a continuous supply of water;
ring fire risers for a combined service and fire water supply system in buildings with a height of 6 floors or more. At the same time, to ensure the replacement of water in the building, it is necessary to provide for a ringing of fire risers with one or several water risers with the installation of shut-off valves.
5.4.2. Two or more inputs should be provided for buildings:
residential with more than 400 apartments, clubs and leisure and entertainment institutions with a stage, cinemas with more than 300 seats;
theaters, clubs and leisure and entertainment institutions with a stage, regardless of the number of seats;
baths with a number of places of 200 or more;
laundries for 2 or more tons of linen per shift;
buildings with 12 or more fire hydrants;
with ring cold water networks or with looped inputs in accordance with 5.4.1;
buildings equipped with sprinkler and deluge systems in accordance with SP 5.13130 with more than three control units.
5.4.3. When installing two or more inlets, provision should be made for connecting them, as a rule, to different sections of the outer ring water supply network. Shut-off devices should be installed between inputs to the building on the external network to ensure water supply to the building in the event of an accident in one of the network sections.
5.4.4. If it is necessary to install pumps in a building to increase pressure in the internal water supply network, the inlets must be combined in front of the pumps with the installation of shut-off valves on the connecting pipeline to ensure water supply to each pump from any inlet.
When installing independent pumping units at each input, there is no need to combine inputs.
5.4.5. It is necessary to provide for the installation of check valves at water supply inlets if several inlets are installed on the internal water supply network, having measuring devices and interconnected by pipelines inside the building.
The horizontal clear distance between the inlets of the drinking water supply and the outlets of the sewerage system or drains should be no less than:
1.5 m - with an input pipeline diameter of up to 200 mm inclusive;
3 m - with an input pipeline diameter of more than 200 mm.
Joint installation of water supply inlets for various purposes is allowed.
5.4.6. On the inlet pipelines, stops should be provided at pipe turns in the vertical or horizontal plane, when the resulting forces cannot be absorbed by the pipe connections.
5.4.7. The intersection of the input pipeline with the walls of the building should be carried out:
in dry soils - with a gap of 0.2 m between the pipeline and building structures and sealing the hole in the wall with waterproof and gas-tight (in gasified areas) elastic materials; in wet soils - with the installation of seals.
5.4.8. The laying of distribution networks of cold and hot water supply pipelines in residential and public buildings should be provided in undergrounds, basements, technical floors and attics, and in the absence of attics - on the ground floor in underground channels together with heating pipelines or under the floor with a removable covering device, and also on building structures where open laying of pipelines is allowed, or under the ceiling of non-residential premises on the upper floor.
5.4.9. Water risers and cold and hot water inlets into apartments and other premises, as well as shut-off valves, measuring instruments, and regulators should be placed in communication shafts with the installation of special technical cabinets that provide free access to them for technical personnel.
The laying of risers and wiring may be provided in shafts, openly - along the walls of showers, kitchens and other similar premises, taking into account the placement of the necessary shut-off, regulating and measuring devices.
For premises with high finishing requirements, and for all networks with pipelines made of polymeric materials (except for pipelines in sanitary facilities), hidden installation should be provided.
Hidden installation of steel pipelines connected with threads (with the exception of elbows for connecting wall-mounted water fittings) without access to the butt joints is not permitted.
5.4.10. The laying of water supply networks inside industrial buildings, as a rule, should be provided open - along trusses, columns, walls and under ceilings. It is allowed to provide for the placement of water pipelines in common channels with other pipelines, except for pipelines transporting flammable, combustible or toxic liquids and gases.
The joint laying of utility and drinking water pipelines with sewerage pipelines may be provided in through channels, while the sewerage pipelines should be placed below the water supply system.
Water pipelines may be laid in special channels during a feasibility study and according to design instructions.
Pipelines supplying water to process equipment may be laid in the floor or under the floor, with the exception of basements.
5.4.11. When installed together in channels with pipelines transporting hot water or steam, the cold water supply network must be placed below these pipelines with a thermal insulation device.
5.4.12. The laying of pipelines should be provided with a slope of at least 0.002; for justification, a slope of 0.001 is allowed.
5.4.13. Pipelines, except for fire risers, laid in channels, shafts, cabins, tunnels, as well as in rooms with high humidity, should be insulated from moisture condensation.
5.4.14. The installation of year-round internal cold water supply should be provided in rooms with air temperatures above 2 °C in winter. When laying pipelines in rooms with air temperatures below 2 °C, it is necessary to take measures to protect pipelines from freezing (electric heating or thermal support).
If it is possible to temporarily reduce the room temperature to 0 °C or lower, as well as when laying pipes in the area influenced by external cold air (near external entrance doors and gates), thermal insulation of the pipes should be provided.
5.4.15. Air release devices should be provided at the highest points of the pipelines of hot water supply systems. The release of air from the pipeline system is allowed through water fittings located at the highest points of the system (upper floors).
Drainage devices should be provided at the lowest points of pipeline systems, except in cases where water dispensing fittings are provided at these points.
5.4.16. When designing hot water supply networks, measures should be taken to compensate for temperature changes in pipe length.
5.4.17. Thermal insulation should be provided for supply and circulation pipelines of hot water supply systems, except for connections to water taps.
5.4.18. Pressure losses in sections of pipelines of cold and hot water supply networks, including when combining risers into water supply units, should be determined taking into account the roughness of the pipe material and the viscosity of water.

5.5. Calculation of the cold water supply network
5.5.1. Hydraulic calculations of cold water water supply networks must be made based on maximum second water flow rates. Hydraulic calculation of cold water pipelines includes: determination of estimated water flow rates, selection of diameters of supply pipelines, ring jumpers and risers, pressure losses and establishment of normalized free pressure at control points of water collection.
For groups of buildings for which hot water is prepared and/or water pressure is increased in separate (or internal) pumping stations and heating points, the determination of the estimated water flow rates and hydraulic calculations of pipelines should be carried out in accordance with these standards.
5.5.2. Networks of combined utility-fire-fighting and industrial-fire-fighting water supply systems must be checked to pass the calculated water flow for fire extinguishing at the calculated maximum second flow for household, drinking and production needs. At the same time, water costs for using showers, washing floors, and watering the territory are not taken into account.
Hydraulic calculation of water supply networks is carried out for design diagrams of ring networks without excluding any sections of the network, risers or equipment.
Note. For residential areas, during fire extinguishing and liquidation of an emergency on the external water supply network, it is allowed not to provide water supply to a closed hot water supply system.

5.5.3. When calculating utility, drinking and industrial networks, including those combined with a fire water supply system, it is necessary to ensure the necessary water pressure for devices located highest and furthest from the input.
5.5.4. Hydraulic calculations of water supply networks fed by several inputs should be made taking into account the shutdown of one of them.
With two inputs, each of them must be designed for 100% water flow.
5.5.5. The diameters of the pipes of internal water supply networks should be taken based on the use of the maximum guaranteed water pressure in the external water supply network.
The diameters of the ring jumper pipelines should be no less than the larger diameter of the water riser.
5.5.6. The speed of water movement in the pipelines of internal networks should not exceed 1.5 m/s, with the capacity of pipelines of integrated economic-fire-fighting and industrial-fire-fighting systems being checked at a speed of 3 m/s.
The diameters of the pipelines of water risers in the water distribution unit should be selected according to the calculated maximum second water flow in the riser with a coefficient of 0.7.

5.6. Calculation of hot water supply network
5.6.1. Hydraulic calculations of hot water circulation systems should be made for two water supply modes (water withdrawal and circulation):
a) determination of the calculated second water consumption, selection of the diameters of the supply pipelines and determination of pressure losses along the supply pipelines in water collection mode;
b) selection of diameters of circulation pipelines, determination of the required circulation flow per second and linking pressure losses along individual rings of hot water supply networks in circulation mode.
5.6.2. The selection of the diameters of the supply pipelines of hot water supply networks in water collection mode should be carried out at the calculated maximum second flow of hot water with a coefficient taking into account the residual circulation flow in water collection mode. The coefficient should be taken:
1.1 - for water heaters and sections of supply pipelines of hot water supply networks to the last water outlet of the main settlement branch;
1.0 - for other sections of supply pipelines.
In the minimum water withdrawal mode at night, the value of the circulation flow of hot water should be taken equal to 30 - 40% of the calculated average second water flow.
5.6.3. The diameters of the water risers in the water distribution unit should be selected according to the estimated maximum second water flow rate in the riser with a coefficient of 0.7, provided that the length of the ring jumpers from the place of the last water withdrawal (along the direction of water movement) of one water riser to a similar point in another water riser does not exceed the length of the water riser itself.
The diameters of the ring jumpers should be no less than the maximum diameter of the water riser.
5.6.4. In networks of open hot water withdrawal from pipelines of the heating network, pressure losses should be determined taking into account the pressure in the return pipeline of the heating network.
5.6.5. The circulation flow in hot water supply networks should be determined:
when distributing the circulation flow rate in proportion to heat loss (due to the variable resistance of the circulation risers) - according to the sum of heat losses of the supply pipelines and the temperature difference from the outlet of the heater to the point of water selection.
Changing the resistance of circulation risers must be done by selecting their diameter, using balancing valves, automatic control devices and throttling diaphragms (diameter of at least 10 mm).
5.6.6. If there is a ring jumper between the water risers, when calculating the heat loss of the water distribution unit, the heat loss of the pipelines of the ring jumper is taken into account.
5.6.7. Pressure losses in circulation mode in individual branches of the hot water supply system (including circulation pipelines) should not differ for different branches by more than 10%.
5.6.8. The speed of movement of hot water in the pipelines of the hot water supply system should not exceed 1.5 m/s.

SNiP 2.04.01-85*

BUILDING REGULATIONS

INTERNAL WATER PIPELINE AND

BUILDING SEWERAGE

Date of introduction 1986-07-01

DEVELOPED BY GPI Santekhproekt of the State Construction Committee of the USSR (Yu.N. Sargin), TsNIIEP of engineering equipment of the State Civil Engineering Committee (Candidate of Technical Sciences L.A. Shopensky), MNIITEP GlavAPU of the Moscow City Executive Committee (Candidate of Technical Sciences N.N. Chistyakov; I.B. Pokrovskaya ), Donetsk Industrial Construction Project of the USSR State Construction Committee (E.M. Zaitseva), SKTB Rostrubplast of the Roskolkhozstroyobedinenie (Candidate of Technical Sciences A.Ya. Dobromyslov), Mosstroy Research Institute (Candidate of Technical Sciences Ya.B. Alesker), NPO | Stroypolymer" (prof. V.S. Romeiko, V.A. Ustyugov), MGSU (prof. V.N. Isaev), Mosvodokanalproekt (A.S. Verbitsky).

INTRODUCED GPI Santekhproekt of the USSR State Construction Committee.

PREPARED FOR APPROVAL BY Glavtekhnormirovanie Gosstroi USSR (Ministry of Construction of Russia) - B.V. Tambovtsev, V.A. Glukharev.

APPROVED by Decree of the USSR State Committee for Construction Affairs dated October 4, 1985 No. 189.

AGREED BY THE USSR Ministry of Health, GUPO USSR Ministry of Internal Affairs.

INSTEAD SNiP II-30-76 and SNiP II-34-76.

SNiP 2.04.01-85* is a reissue of SNiP 2.04.01-85 with amendment No. 1, approved by Resolution of the USSR State Construction Committee of November 28, 1991 No. 20, and amendment No. 2, approved by Resolution of the Ministry of Construction of Russia of July 11, 1996 No. 18 -46.

Items and tables to which changes have been made are marked in these building codes and regulations with an asterisk.

1. GENERAL PROVISIONS

1.1. These standards apply to the design of internal cold and hot water supply, sewerage and drainage systems under construction and reconstruction.

1.2. When designing systems for internal cold and hot water supply, sewerage and drains, it is necessary to comply with the requirements of other regulatory documents approved or agreed upon by the Ministry of Construction of Russia.

1.3. These standards do not apply to the design of:

automatic fire extinguishing systems;

heating points;

hot water treatment plants;

hot water supply systems that supply water for the technological needs of industrial enterprises (including medical procedures) and water supply systems within technological equipment;

special industrial water supply systems (deionized water, deep cooling, etc.).

1.4. Internal water supply is a system of pipelines and devices that provides water supply to sanitary fixtures, fire hydrants and technological equipment, serving one building or group of buildings and structures and having a common water-measuring device from the water supply network of a settlement or industrial enterprise.

In the case of supplying water from the system for external fire extinguishing, the design of pipelines laid outside buildings must be carried out in accordance with SNiP 2.04.02-84*.

Notes: 1. Hot water preparation should be provided for

installations in accordance with the thermal design guidelines

points and heating units.

2. Local wastewater treatment plants should be designed in accordance with

in accordance with SNiP 2.04.03-85 and departmental building standards.

1.5. In all types of buildings erected in sewer areas, internal water supply and sewerage systems should be provided.

In non-sewered areas of populated areas, internal water supply and sewerage systems with the installation of local sewage treatment facilities must be provided in residential buildings over two floors high, hotels, nursing homes (in rural areas), hospitals, maternity hospitals, clinics, outpatient clinics, dispensaries, sanitary and epidemiological stations, sanatoriums, rest homes, boarding houses, pioneer camps, nurseries, boarding schools, educational institutions, secondary schools, cinemas, clubs, catering establishments, sports facilities, bathhouses and laundries.

Notes: 1. In production and auxiliary buildings

internal water supply and sewerage systems are not allowed

provide in cases where the enterprise does not have

centralized water supply and the number of employees is no more

25 people per shift.

2. In buildings equipped with internal drinking water or

industrial water supply, it is necessary to provide a system

internal sewerage.

1.6. In non-sewered areas of settlements, it is allowed to equip the following buildings (structures) with backlash closets or cesspools (without installing water supply inlets):

production and auxiliary buildings of industrial enterprises with up to 25 employees. per shift;

residential buildings 1-2 floors high;

dormitories with a height of 1-2 floors for no more than 50 people;

pioneer camps with no more than 240 places, used only in the summer;

Type I clubs;

open planar sports facilities;

catering establishments with no more than 25 seats.

Note. Backlash closets may be provided when

designing buildings for climatic regions I-III.

1.7. The need to install internal drains is established by the architectural and construction part of the project.

1.8. Pipes, fittings, equipment and materials used in the installation of internal systems of cold and hot water supply, sewerage and drains must comply with the requirements of these norms, state standards, norms and technical specifications approved in the prescribed manner.

1.9. The main technical decisions taken in projects and the order of their implementation must be justified by comparing the indicators of possible options. Technical and economic calculations should be performed for those options whose advantages (disadvantages) cannot be established without calculation.

The optimal calculation option is determined by the lowest value of the reduced costs, taking into account the reduction in the consumption of material resources, labor costs, electricity and fuel.

1.10. When designing, it is necessary to provide for the use of progressive technical solutions and work methods: mechanization of labor-intensive work, automation of technological processes and maximum industrialization of construction and installation work through the use of prefabricated structures, standard and standard products and parts manufactured in factories and procurement workshops.

1.11. The main letter designations adopted in these standards are given in the mandatory Appendix 1.

2. WATER QUALITY AND TEMPERATURE

IN WATER SUPPLY SYSTEMS

2.1. The quality of cold and hot water supplied for domestic and drinking needs must comply with GOST 2874-82*. The quality of water supplied for production needs is determined by technological requirements.

2.2. The temperature of hot water at water intake points should be provided:

a) not lower than 60°C - for centralized hot water supply systems connected to open heat supply systems;

b) not lower than 50°C - for centralized hot water supply systems connected to closed heat supply systems;

c) not higher than 75°C - for all systems specified in subparagraphs | a" and | b".

2.3. In the premises of preschool institutions, the temperature of hot water supplied to the water fittings of showers and washbasins should not exceed 37°C.

2.4. At catering establishments and for other water consumers who need hot water at a temperature higher than that specified in clause 2.2, local water heaters should be provided for reheating the water.

2.5. The temperature of hot water supplied by water heaters to the distribution pipelines of centralized hot water supply systems must comply with the recommendations of the manual for the design of heating points.

2.6. In settlements and enterprises where sources of drinking water supply do not meet all the needs of consumers, with a feasibility study and in agreement with the sanitary and epidemiological service authorities, it is allowed to supply non-potable quality water to urinals and toilet flush tanks.

3. DETERMINATION OF ESTIMATED COSTS

WATER IN WATER SUPPLY SYSTEMS AND

SEWERAGE AND HEAT FOR NEEDS

HOT WATER SUPPLY

3.1. Cold, hot water supply and sewerage systems must provide water supply and wastewater disposal (flow) corresponding to the estimated number of water consumers or installed sanitary fixtures.

assigned to one device, the following should be determined:

a separate device - in accordance with mandatory Appendix 2;

various devices serving the same water consumers in the dead-end network section - in accordance with mandatory Appendix 3;

different devices serving different water consumers - according to the formula

Probability of action of sanitary fixtures determined for

each group of water consumers according to clause 3.4;

Secondary water consumption (total, hot, cold), l/s, draw-off

fittings (device), accepted in accordance with mandatory Appendix 3,

for each group of water consumers.

should be determined for the network as a whole and accepted the same for all

plots.

2. In residential and public buildings and structures for which

there is no information on water consumption and technical characteristics

l/s, should be determined by the formula

			Secondary water flow, the value of which should be determined according to clause 3.2;
			4 depending on the total number of devices N in the design area networks and the probability of their action P, calculated according to clause 3.4. At be guided by P > 0.1 and N
			coefficient
			applications 4.

With known calculated values of P, N and values of q(0) = 0.1; 0.14; 0.2; 0.3 l/s To calculate the maximum second water flow rate, it is allowed to use nomograms 1-4 of the recommended Appendix 4.

Notes: 1. Water flow at the end sections of the network should be

accepted according to calculation, but not less than the maximum second flow rate

water using one of the installed sanitary fixtures.

2. Water consumption for technological needs of industrial enterprises

should be determined as the sum of water consumption by process

equipment, provided that the operation of the equipment coincides in time.

3. For auxiliary buildings of industrial enterprises, the value of q

may be determined as the amount of water consumption for domestic needs according to

formula (2) and shower needs - according to the number of installed shower nets according to

mandatory appendix 2.

b) with different groups of water consumers in a building (buildings) or structure (structures) for various purposes

Notes: 1. In the absence of data on the number of sanitary facilities

devices in buildings or structures, the P value can be determined

according to formulas (3) and (4), taking N = 0.

2. For several groups of water consumers, for which periods

the highest water consumption will not coincide by time of day,

the probability of the devices operating for the system as a whole is acceptable

calculated using formulas (3) and (4) taking into account reduction factors,

determined during the operation of similar systems.

and hot water supply serving a group of devices, according to the formula

a) with identical water consumers in the building (buildings) or structure (structures) in accordance with mandatory Appendix 3;

b) with different water consumers in the building (buildings) or structure (structures) - according to the formula

Note. In residential and public buildings (structures), according to

which lack information about the number and technical characteristics

sanitary appliances, it is allowed to accept:

depending on the total number of devices N served by the designed

system, and the likelihood of their use

Calculated according to clause 3.7.

and N coefficient

Note. For auxiliary buildings of industrial enterprises

use of showers and household and drinking needs, taken according to

mandatory Appendix 3 on the number of water consumers in the most

numerous shifts.

3.10. When designing direct water collection from the pipelines of a heating network for the needs of hot water supply, the average temperature of hot water in the water collection risers should be maintained at 65°C, and the hot water consumption rates should be taken in accordance with the mandatory Appendix 3 with a coefficient of 0.85, while the total amount of water consumed should not be changed .

3.11. The maximum hourly wastewater flow rate should be taken equal to the calculated flow rate determined in accordance with clause 3.8.

3.12. Daily water consumption should be determined by summing the water consumption of all consumers, taking into account the water consumption for irrigation. The daily flow of wastewater must be taken equal to water consumption without taking into account the water consumption for irrigation.

a) within an hour

WATER PIPES

4. COLD WATER WATER SYSTEMS

4.1. Internal water supply systems (drinking, industrial, fire) include: inputs to buildings, water metering units, distribution network, risers, connections to sanitary fixtures and technological installations, water supply, mixing, shut-off and control valves. Depending on local conditions and production technology, the internal water supply system should include pumping units and spare and control tanks connected to the internal water supply system.

4.2. The choice of internal water supply system should be made depending on the technical and economic feasibility, sanitary, hygienic and fire safety requirements, as well as taking into account the adopted external water supply system and the requirements of production technology.

Connecting household drinking water supply networks with water supply networks supplying non-potable water is not permitted.

4.3. For groups of buildings that differ in height by 10 m or more, measures should be taken to ensure the required water pressure in the water supply systems of these buildings.

4.4. Industrial water supply systems must meet technological requirements and not cause corrosion of equipment and pipelines, salt deposits and biological fouling of pipes and devices.

4.5. In buildings (structures), depending on their purpose, the following internal water supply systems should be provided:

household and drinking;

fire protection;

production (one or more).

The fire-fighting water supply system in buildings (structures) that have drinking or industrial water supply systems should, as a rule, be combined with one of them.

4.6. In production and auxiliary buildings, depending on the requirements of production technology and in accordance with the instructions for the construction design of enterprises, buildings and structures of various industries, in order to reduce water consumption, systems of circulating water supply and water reuse should be provided.

Note. When justifying circulating systems, it is not allowed

provide.

4.7. If technically possible, recycling water supply systems for cooling process solutions, products and equipment should be designed, as a rule, without breaking the stream with water supplied to the coolers using the residual pressure.

4.8. When designing water supply systems, it is necessary to take measures to reduce unproductive water consumption and reduce noise.

5. HOT WATER SYSTEMS

5.1. Depending on the mode and volume of hot water consumption for domestic and drinking needs of buildings and structures for various purposes, centralized water supply systems or local water heaters should be provided.

Note. If it is necessary to supply hot drinking water

quality for technological needs, it is allowed to provide for the supply

hot water simultaneously for domestic and drinking water and technological

5.2. It is not allowed to connect the pipelines of the hot water supply system with pipelines supplying hot water of non-potable quality for technological needs, as well as direct contact with technological equipment and installations of hot water supplied to the consumer with a possible change in its quality.

5.3. The choice of heating and water treatment scheme for centralized hot water supply systems should be made in accordance with SNiP 2.04.07-86* and | Guidelines for the design of heating points."

5.4. In centralized hot water supply systems, it is necessary to provide for the placement of water heating points, as a rule, in the center of the hot water consumption area.

5.5. It is permitted not to provide for the circulation of hot water in centralized hot water supply systems with time-regulated consumption of hot water, if its temperature at the water supply points does not drop below that established in Section. 2 of these standards.

5.6.* In buildings and premises of medical institutions, preschool and residential buildings, in bathrooms and showers it is necessary to install heated towel rails connected to hot water supply systems, as a rule, according to a scheme that ensures constant heating with hot water.

Notes: 1. When supplying hot water by centralized systems

hot water supply connected to heating networks with

direct water supply, it is allowed to connect

heated towel rails for independent heating systems

year-round use of bathrooms and showers.

2. Shut-off valves should be provided on heated towel rails

to turn them off in the summer.

5.7. In residential and public buildings over 4 floors high, groups of water risers should be combined with ring jumpers into sectional units with each sectional unit connected by one circulation pipeline to the combined circulation pipeline of the system. From three to seven water risers should be combined into sectional units. Ring jumpers should be laid in a warm attic, in a cold attic under a layer of thermal insulation, under the ceiling of the upper floor when supplying water to the water risers from below, or in the basement when supplying water to the water risers from above.

Note. It is allowed not to loop water risers when

the length of the ring jumper exceeding the total

length of circulation risers.

5.8. In buildings up to 4 floors high, as well as in buildings in which there is no possibility of laying ring jumpers, it is allowed to install heated towel rails:

on the circulation risers of the hot water supply system;

on a year-round bathroom heating system, while water risers and distribution pipelines should be laid together with heating pipelines in general insulation.

5.9. Connecting water taps to circulation risers and circulation pipelines is not permitted.

5.10. For rural populated areas and towns, the choice of the type of hot water supply system is determined by a technical and economic calculation.

5.11. The installation of storage tanks in a centralized hot water supply system should be provided in accordance with Section. 13.

5.12.* The pressure in the hot water supply system at sanitary appliances should be no more than 0.45 MPa (4.5 kgf/sq.cm).

6. FIRE WATER SYSTEMS

6.1.* For residential and public buildings, as well as administrative buildings of industrial enterprises, the need to install an internal fire-fighting water supply system, as well as the minimum water consumption for fire extinguishing, should be determined in accordance with Table. 1*, and for industrial and warehouse buildings - in accordance with table. 2.

The water consumption for fire extinguishing, depending on the height of the compact part of the jet and the diameter of the spray, should be clarified according to the table. 3.

The need to install automatic fire extinguishing systems must be taken in accordance with the requirements of the relevant estimated norms and rules and lists of buildings and premises to be equipped with automatic fire extinguishing equipment, approved by the ministries. In this case, the simultaneous operation of fire hydrants and sprinkler or deluge installations should be taken into account.

Table 1*

Residential, public and administrative buildings and premises		Minimum water consumption for internal fire extinguishing, l/s, per jet
1. Residential buildings:
with the number of floors from 12 to 16
the same, with a total corridor length of over 10 m
with the number of floors St. 16 to 25
the same, with the total length of the corridor of St. 10 m
2. Office buildings:
height from 6 to 10 floors and volume up to



3. Clubs with a stage, theaters, cinemas, assembly and conference halls equipped with film equipment	According to SNiP 2.08.02-89*
4. Dormitories and public buildings not listed in pos. 2:
with the number of floors up to 10 and volume from 5000 to 25000 cubic meters
the same, volume of St. 25000 cubic meters
with the number of floors St. 10 and volume up to
the same, volume of St. 25000 cubic meters
5. Administrative buildings industrial enterprises volume, cubic meters:
from 5000 to 25000

Notes: 1. The minimum water flow rate for residential buildings can be taken equal to 1.5 l/s in the presence of fire nozzles, hoses and other equipment with a diameter of 38 mm. 2. The volume of the building is taken to be the construction volume determined in accordance with SNiP 2.08.02-89.

table 2

Degree of fire instability of buildings	on fire danger	Number of jets and minimum water consumption, l/s, per jet, for internal fire extinguishing in industrial and warehouse buildings up to 50 m high and volume, thousand cubic meters
			St. 50 to 200	St. 200 to 400	St. 400 to 800





Notes: 1. For laundry factories, fire extinguishing should be provided in the dry laundry processing and storage areas. 2. Water consumption for internal fire extinguishing in buildings or premises with a volume exceeding the values indicated in table. 2, should be agreed upon in each specific case with the territorial fire authorities. 3. The number of jets and water consumption of one jet for buildings of fire resistance class: IIIb - buildings of predominantly frame construction. Frame elements made of solid or laminated wood and other combustible materials of enclosing structures (mainly wood) subjected to fire retardant treatment; IIIa - buildings predominantly with an unprotected metal frame and enclosing structures made of fireproof sheet materials with low-flammable insulation; IVa - predominantly one-story buildings with a metal unprotected frame and enclosing structures made of sheet fireproof materials with combustible insulation are accepted according to the specified table depending on the location of categories of production in them, both for buildings of II and IV fire resistance degrees, taking into account the requirements of paragraph 6.3* (equating fire resistance degrees IIIa to II, IIIb and IVa to IV).

Table 3

Height of the compact part of the jet or

Produce

activity

fire department

jets, l/s

Pressure, m, y

hot tap

with sleeves

length, m

Produce

activity

fire department

jets, l/s

Pressure, m, y

hot tap

with sleeves

length, m

Produce

activity

fire department

jets, l/s

Pressure, m, y

hot tap

with sleeves

length, m

premises,

Fire nozzle tip spray diameter, mm

Fire hydrants d = 50 mm

Fire hydrants d = 65 mm