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August 12, 2017 18:07

SNIP 3.05.01-85 - Internal sanitary systems

SNIP 3.05.01-85 - Internal sanitary systems

building regulations


SNIP 3.05.01-85

USSR State Committee for Construction

Moscow 1988


developed by the State design Institute Proektpromventilyatsiya and All-Union scientific research Institute of jetting, sanitary and special construction works (VNIIGS) Minmontazhspetsstroya USSR (Candidate of technical Sciences, PA Ovchinnikov - the head of the theme; EN Zaretsky, LG. Sukhanov, V. Nefedova;. candidates of Technical Sciences AG Yashkul, GS Shkalikov).

INCLUDED Minmontazhspetsstroya USSR.

prepared for approval Glavtehnormirovaniem USSR State Construction Committee (NA SHishov).

With the introduction of SNIP 3.05.01-85 "Internal sanitary systems" lose force SNIP III-28-75 «sanitary equipment of buildings and structures."

When using the standard document should take into account the changes approved by the state building codes and standards, published in the "Bulletin of construction machinery" magazine, "Compendium o

f changes to building regulations," State Construction Committee of the USSR and the information signs "State Standards of the USSR" State Standard.


USSR Committee for
construction (Gosstroy USSR)

Building Regulations

SNIP 3.05.01-85

Internal sanitary systems

SNIP III-28-75

These rules apply to the installation of internal systems, hot and cold water, heating, sewerage, drains, ventilation, air conditioning (including pipelines for ventilation units), with a pressure boilersteam up to 0.07 MPa (0.7 kgf / cm2) and a water temperature of up to 388 K (115 ° C) in the construction and reconstruction of enterprises, buildings and structures, as well as for the manufacture of air ducts, nodes and details of the pipes.


1.1.Building sanitation systems should be carried out in accordance with the requirements of these Regulations, CH 478-80 and SNIP 3.01.01-85, SNIP III-4-80, SNIP III-3-81, standards, specifications and guidelines plants- equipment manufacturers.

during installation and manufacture of components and parts of heating systems and piping for ventilation units (hereinafter - the "heat") with a water temperature above 388 K (115 ° C) and steam with an operating pressure of more than 0.07 MPa (0.7 kgf /cm) should perform installation and safe operation of steam and hot water, approved by the State Technical Supervision of the USSR.

1.2.Installation of internal plumbing systems and boiler must be performed by industrial methods of piping components, ducting and equipment supplied complete with large blocks.

When installing industrial buildings covering of large blocks of ventilation and other sanitary system should be installed in the blocks before installing them in the design position.

Installation of sanitary-engineering systems should be carried out at the construction readiness of the object (zahvatki) in the amount of:


USSR State Committee
construction of 13 December 1985. number 224


into effect July 1, 1986

for industrial buildings - the whole building with the volume of 5000 m3 and part of the building for a volume of more than 5000 m3, including on the basis of the location of individual manufacturingroom, workshop, span, and so on, or set of devices (including internal drains, heater, ventilation system, one or more air conditioners, etc...)..;

for residential and public buildings up to five storeys - a separate building, one or more sections;over five floors - 5 floors of one or more sections.

1.3.Prior to the installation of internal plumbing systems, the general contractor of the following work to be performed:

installation of intermediate floors, walls and partitions, for which sanitary equipment will be installed;

device bases or sites for the installation of boilers, water heaters, pumps, fans, air conditioners, exhaust fans, heaters and other plumbing equipment;

erection of building constructions of ventilation chambers of air supply systems;

sealing device in the place of installation of air conditioning, air handling ventilation chambers, wet filters;

device trenches for sewage issues from the first to the building of wells and wells with trays, as well as the laying of external communications inputs sanitation systems in the building;

floor installation (or appropriate training) in the field installation of heaters and fans in the stands mounted on spring shock absorbers, as well as "floating" reason for installing ventilation equipment;

device supports for the installation of roof fans, exhaust shafts and vents on the roof of the building, as well as supports for pipelines, built in underground ducts and technical subfields;

training holes, grooves, recesses and nests in foundations, walls, partitions, ceilings and surfaces required for piping and ducts;

application on interior and exterior walls of all rooms auxiliary marks equal to the design level of the finished floor plus 500 mm;

installation of window boxes, and in public buildings - window sills;

plastering (or lining) of walls and niches in the field of sanitary installations and heating appliances, piping and ductwork, as well as plastering surface grooves for hidden piping in exterior walls;

preparation of installation openings in walls and ceilings for supplying large equipment and ducts;

installation in accordance with the operational documentation, embedded parts in constructions for mounting of equipment, ductwork and piping;

ensure the possibility of including power tools and electric welding machines at a distance of no more than 50 m apart;

glazing window openings in the exterior fences, insulation of entrances and openings.

1.4.Civil, sanitary and other special work should be done in the lavatories in the following order:

training under the floors, plastering walls and ceilings, beacon device to install ladders;

installation fastening means, the laying of pipelines and holding their hydrostatic test or gauge;waterproofing ceilings;

priming the walls, the device clean floors;

install baths, sinks under the brackets and mountings cisterns;

first painting of walls and ceilings, tiling;

installing wash basins, toilet bowls and cisterns;

second painting walls and ceilings;installation of water fittings.

Construction, sanitary and other special work plenums must be performed in the following order:

training under the flooring, installation of foundations, plastering walls and ceilings;

device mounting openings, installation of crane beams;

work on the device ventilation chambers;waterproofing ceilings;

heaters installation with strapping pipelines;

installation of ventilation equipment and air ducts and other plumbing, and electrical work;

test bulk water irrigation camera pan;insulation work (heat and sound insulation);

finishing work (including sealing holes in ceilings, walls and partitions after piping and ducts);

device clean floors.

When installing sanitary systems and carrying out related civil works should not be damaged before the work performed.

1.5 Dimensions of holes and grooves for piping in ceilings, walls and partitions of buildings and structures are taken according to the recommended application 5, if other dimensions are not provided for the project.

1.6.Welding steel pipes must be carried out in any way regulated standards.

types of welded joints of steel pipe, shape, structural weld sizes must comply with the requirements of GOST 16037-80.

welding galvanized steel pipe should be made self-protective wire grade Sv-15GSTYUTSA CE, GOST 2246-70 diameter 0,8-1,2 mm or electrodes with a diameter of not more than 3 mm with rutile or rutile-coated calcium, if the use of other consumablesIt agreed in the prescribed manner.

compound of galvanized steel tubes, welded parts and assemblies for installation and processing plant should be carried out provided that local exhaust toxic emissions or cleaning the zinc coating on the length of 20-30 mm from the pipe ends to be joined, followed by coating the outer surface of the weld and heat affected zonepaint containing 94% of zinc dust (by mass), and 6% of synthetic binder (Polyethylene, chlorinated rubber, epoxy resin).

should meet the requirements of GOST 12.3.003-75 When welding steel pipes, parts and assemblies.

compound steel pipe (galvanized and non-galvanized), as well as their parts and assemblies of nominal bore diameter up to 25 mm inclusive, at the construction site should be done by welding overlap (with the distribution of one end of the pipe coupling or threadless).Butt joint pipe diameter nominal bore up to 25 mm inclusive may be performed on the processing plant.When welding

threaded surface and the mirror surface of the flanges should be protected from splashes and droplets of molten metal.

The weld should be free of cracks, cavities, pores, undercuts, nezavarennyh craters and crater line burns and stains deposited metal.

holes in pipes with diameter up to 40 mm for welding the pipes must be performed, usually by drilling, milling or cutting down on the press.

diameter should be equal to the inner diameter of the pipe to permissible deviations 1 mm.

1.7.Installation of sanitary-engineering systems in complex, unique and experimental buildings should be carried out according to the requirements of these rules and special instructions documentation.


for units and parts of steel pipe

2.1.Production of components and parts of steel pipe should be carried out in accordance with the specifications and standards.Manufacturing tolerances must not exceed the values ​​specified in the table.1.

Table 1

Content tolerance

tolerance magnitude


squareness of cut ends of the pipes

not more than 2 °

length billet parts

± 2 mm and a length of 1 m and ± 1 mm for each subsequent meter

Dimensions burrs in the holes and the ends of the cut pipe

not more than 0.5 mm

oval pipes in the bending zone

not more than 10%

number of threads with incomplete or stripped threads


Deviation thread length:


- 10%


+ 5 mm

2.2.Steel pipes, as well as parts and assemblies of them should be carried out on welding, thread, union nut and flange (to fittings and equipment).

Galvanized pipes, parts of it must be connected, as a rule, on the thread with galvanized steel or non-galvanized connecting parts made of ductile cast iron, on the union nut and flange (to fittings and equipment).

For threaded joints of steel pipes should be used a cylindrical pipe thread, performed in accordance with GOST 6357-81 (class B) on the knurled threaded tubes and lungs - at the ordinary and reinforced.When manufacturing

thread by rolling the pipe may be reduced at its inner diameter to 10% the entire length of the thread.

2.3.Turns piping in heating and district heating systems should be performed by bending the pipes or the use of seamless welded bends of carbon steel according to GOST 17375-83.

radius bending of pipes with nominal diameters up to 40 mm inclusive shall be at least 2.5 Dnar and a nominal width of 50 mm or more - not less than 3.5 Dnar pipe.

2.4.The cold and hot water supply piping bends should be done by setting the angles in accordance with GOST 8946-75, bends or bend pipe.Galvanized pipe should bend only in the cold state.

For pipes 100 mm in diameter and allowed to use a bent and welded taps.The minimum radius of the bends must be at least one and a half nominal bore pipe.

When bending welded pipe welded seam should be positioned on the outside billets and at an angle of at least 45 ° to the plane of bending.

2.5.Jelly weld on curved portions of the pipes in the heating elements of heating panels is not allowed.

2.6.When assembling nodes threaded joints must be sealed.As a sealant for threaded connections at medium temperatures up to 378 K (105 ° C) inclusive must apply PTFE tape of sealing material (FUM), or a linen lock impregnated with lead oxide or whitewash, zameshennymi on drying oil.

as a sealant for threaded connections at medium temperatures above 378 K (105 ° C) and for condensing lines must be used tape FUM or asbestos strand with a strand of flax, impregnated graphite, zameshennym on drying oil.

Tape FUM and linen lock should be imposed evenly over the course of the thread, and not to act in and out of the pipe.

as a sealant for flange connections For medium temperatures less than 423 K (150 ° C) should be used paronite 2-3 mm or PTFE-4, and at a temperature of no more than 403 K (130 ° C) - heat-resistant gasketsrubber.

For threaded and flanged connections are permitted and other sealing materials, pressure-tight joints at the design temperature coolant and agreed in the prescribed manner.

2.7.The flanges are connected to the pipe by welding.

deviation from perpendicularity of the flange is welded to the pipe with respect to the axis of the pipe to be 1% of the outer diameter of the flange, but not more than 2 mm.

flange surfaces must be smooth and free of burrs.Bolt heads should be located on one side of the connection.

The vertical pipe sections nuts should be placed at the bottom.The ends of the bolts

usually should not protrude from the nut over the bolt diameter of 0.5 or 3 thread pitch.

end of the pipe, including seam welding of the flange to the pipe must not protrude beyond the mirror flange.

Gaskets in flanged joints must not overlap the bolt holes.

installation between flanges, or multiple tapered shims are not allowed.

2.8.Deviations linear dimensions of assembled units must not exceed ± 3 mm and a length of 1 m and ± 1 mm for each subsequent meter.

2.9.Nodes sanitation systems must be tested for leaks at the point of manufacture.

Nodes of pipelines heating systems, heat supply, domestic one and hot water, including those intended for incorporation into the heating plates, valves, cranes, latches, mudguards, air tanks, silos, etc. N. You must try hydrostatic (hydraulic) orbubble (pneumatic) method in accordance with GOST 25136-82 and GOST 24054-80.