Snip 2 04 08 87 updated edition. Gas supply

2. GAS SUPPLY SYSTEMS AND GAS PRESSURE RATES

2.2 . Gas pipelines of gas supply systems, depending on the pressure of the transported gas, are divided into:

High-pressure gas pipelines of category 1 - with operating gas pressure over 0.6 MPa (6 kgf/cm2) up to 1.2 MPa (12 kgf/cm2) inclusive. for natural gas and gas-air mixtures and up to 1.6 MPa (16 kgf/cm2) for liquefied hydrocarbon gases (LPG);

High-pressure gas pipelines of category II - with operating gas pressure over 0.3 MPa (3 kgf/cm2) to 0.6 MPa (6 kgf/cm2);

Medium pressure gas pipelines - at operating gas pressure over 0.005 MPa (0.05 kgf/cm2 to 0.3 MPa (3 kgf/cm2);

Low pressure gas pipelines - at operating gas pressure up to 0.005 MPa (0.05 kgf/cm2) incl.

2.3 . The classification of gas pipelines included in the gas supply system is given in reference Appendix 1.

2.4 . The gas pressure in gas pipelines laid inside buildings should be no more than the values given in table. 1.

Table 1

Gas consumers	Gas pressure, MPa (kg/cm2)
1. Production buildings of industrial and agricultural enterprises, as well as free-standing boiler houses and consumer service enterprises of an industrial nature (baths, laundries, dry cleaning factories, enterprises for the production of bread and confectionery, etc.)	0,6 (6)
2. Consumer service enterprises of a production nature, listed in pos. 1, attached to buildings for other industrial purposes or built into these buildings	0,3 (3)
3. Non-production consumer service enterprises and public buildings	0,005 (0,05)
4. Residential buildings	0,003 (0,03)

For heating installations of industrial enterprises and free-standing boiler houses, the use of gas with a pressure of up to 1.2 MPa (12 kgf/cm2) is allowed, if such pressure is required by the conditions of the production technology.

It is allowed to use gas with a pressure of up to 0.6 MPa (6 kgf/cm2) in boiler rooms located in extensions to industrial buildings.

2.5 .Gas pressure in front of household gas appliances should be taken in accordance with the passport data of the devices, but no more than specified in pos. 4 tables 1.

6. INTERNAL GAS SUPPLY DEVICES

GAS SUPPLY TO RESIDENTIAL BUILDINGS

6.29. Installation of gas stoves in residential buildings it is necessary to provide kitchens with a height not less than 2.2 m having a window with a window (transom), an exhaust ventilation duct and natural lighting. In this case, the internal volume (m3) of kitchen premises must be no less than: for a gas stove with 2 burners - 8 m3, 3 - 12 m3, 4 - 15 m3

6.30. In existing residential buildings, it is allowed to install gas stoves:
- indoors, kitchens with a height of at least 2.2 m and a volume of not less than that specified in clause 6.29 in the absence of a ventilation duct and the impossibility of using chimneys as such a duct, but if there is a window in the room with a window or transom in the upper part of the window;
- in the corridors for individual use if there is a window in the corridor with a window or transom in the upper part of the window, the passage between the slab and the opposite wall must be at least 1 m wide, the walls and ceilings of the corridors made of flammable materials must be plastered, and the living quarters must be separated from the corridor by dense partitions and doors;
-in kitchens with sloping ceilings having a height in the middle part of at least 2 m, the installation of gas equipment should be provided in that part of the kitchen where the height is at least 2.2 m.

6.31. In existing residential buildings owned by citizens as personal property, it is allowed to install gas stoves in premises that meet the requirements of clauses 6.29 or 6.30, but have a height of less than 2.2 m up to 2 m inclusive, if these premises have a volume of at least 1 .25 times more than the normative value. At the same time, in houses that do not have a dedicated kitchen, the volume of the room. where the gas stove is installed, should be twice as large as specified in clause 6.29.
If it is impossible to meet these requirements, the installation of gas stoves in such premises may be allowed on a case-by-case basis with the approval of the local sanitary inspection authority.

6.32. The possibility of installing gas stoves, heating and other devices in buildings located outside a residential building is decided by the design organization and operational organization of the gas industry, taking into account specific local conditions, including the availability of gas for these purposes. At the same time, the premises in which the installation of gas appliances is planned must comply with the requirements for the premises of residential buildings where the placement of such appliances is allowed.

6.33. Wooden unplastered walls and walls made of other combustible materials in places where slabs are installed should be insulated with non-combustible materials: plaster, roofing steel on an asbestos sheet with a thickness of at least 3 mm, etc. The insulation must protrude beyond the dimensions of the slab by 10 cm on each side and at least 80 cm on top.
Distance from the stove to those insulated with non-combustible materials the walls of the room must be at least 7 cm; distance between plate and the opposite wall must be at least 1 m.

6.34. For hot water supply, instantaneous or capacitive gas water heaters should be provided, and for heating - capacitive gas water heaters, small heating boilers or other heating devices designed to operate on gas fuel.
The number of floors of residential buildings in which the installation of the specified gas appliances and apparatus is permitted should be taken in accordance with SNiP 2.08.01-89.

6.35. It is allowed to convert small-sized (small-sized) factory-made heating boilers intended for solid or liquid fuels to gas fuel.
Heating installations converted to gas fuel must be equipped with gas burner devices with automatic safety in accordance with the requirements provided for in Section 11.
It is not allowed to install in one room more than two DHW cylinders or two small heating boilers or two other heating devices.

6.36 . The installation of chimneys must comply with the requirements of SNiP 2.04.05-91 *as for heating stoves. When deciding on the possibility of connecting gas appliances to chimneys, it is permissible to be guided by the data given in reference Appendix 6.

6.37.* The installation of water heaters, heating boilers and heating devices should be provided in kitchens and non-residential premises intended for their placement and meeting the requirements of paragraphs. 6.42* and 6.43. Installation of these devices in bathrooms is not allowed.. The issue of the need to move gas water heaters from bathrooms, in which they were placed in accordance with previously existing standards, to kitchens or other non-residential premises of a residential building during the reconstruction of a house or gas supply system, should be decided on a case-by-case basis by the design organization in agreement with local operating organizations gas industry.
In existing residential buildings, it is allowed to provide for the installation of gas heating appliances and heating units in corridors for individual use that meet the requirements of paragraphs. 6.42*and 6.43.
The distance from the protruding parts of gas burners or fittings to the opposite wall must be at least 1 m.

6.38. Installation of gas instantaneous water heaters should be provided on walls made of non-combustible materials at a distance of at least 2 cm from the wall(including from the side wall).
If there are no walls made of non-combustible materials in the room, it is allowed to install an instantaneous water heater on plastered, as well as on walls lined with non-combustible or difficult-to-combustible materials at a distance at least 3 cm from the wall.
The surface of fire-resistant walls should be insulated with roofing steel on an asbestos sheet with a thickness of at least 3 mm. The insulation must protrude for the dimensions of the water heater body by 10 cm.

6.39. The installation of gas heating boilers, heating devices and capacitive gas water heaters should be provided near walls made of non-combustible materials at a distance of at least 10 cm from the wall.
If there are no walls made of non-combustible materials in the room, it is allowed installation of the above heating devices near walls protected in accordance with the instructions of clause 6.38, at a distance at least 10 cm from the wall.

6.40. Horizontal clear distance between protruding parts instantaneous water heater and gas stove should be taken at least 10cm.

6.41.* When installing a gas stove and instantaneous water heater in the kitchen, the volume of the kitchen should be taken in accordance with clause 6.29.
When installing in the kitchen a gas stove and a cylinder water heater, a gas stove and a heating boiler or heating device, as well as a gas stove with built-in devices for heating water (heating, hot water supply) The volume of the kitchen should be 6 m3 more than the volume provided by l. 6.29.

6.42.* A room intended to house a gas water heater, as well as a heating boiler or heating apparatus, the combustion products of which are discharged into the chimney, must have height not less than 2 m. The volume of the room must be at least 7.5 m3 when installing one device and at least 13.5 m3 when installing two heating devices.

6.43. The kitchen or room where boilers, appliances and gas water heaters are installed must have a ventilation duct. For air flow, a grille or gap between the door and the floor with a clear cross-section of at least 0.02 m2 should be provided at the bottom of the door or wall opening into the adjacent room.

6.44.* It is not allowed to place all gas appliances in the basement floors (cellars), and for gas supply in the basements and ground floors of buildings for any purpose.
Note. The requirements of this paragraph do not apply to residential buildings owned by citizens on the basis of personal property rights, if the basements of these houses have natural light and their gas supply is from natural gas.

6.45. It is allowed to convert heating and heating-cooking furnaces to gas fuel, provided that:
- stoves, smoke and ventilation ducts meet the requirements of departmental standards for the installation of heating stoves converted to gas fuel, approved in the prescribed manner;
- gas burners installed in the furnaces of heating and heating-cooking furnaces are equipped with automatic safety systems in accordance with the requirements of GOST 16569-86.

6.46. The fireboxes of gasified stoves should be provided, as a rule, on the side of the corridor or other non-residential (non-office) premises.
If it is impossible to meet the specified requirement, it is allowed to provide fireboxes for gasified stoves on the side of residential (office) premises. In this case, the gas supply to the furnaces should be provided by independent branches, on which, at the point of connection to the gas pipeline, a shut-off device should be installed outside the above premises.
The rooms into which the fireboxes of gasified heating and heating-cooking stoves open must have an exhaust ventilation duct or a window with a window, or a door opening onto a non-residential premises or vestibule. A passage at least 1 m wide must be provided in front of the furnace.

6.47. For space heating, it is allowed to install gas fireplaces, air heaters and other factory-made appliances with combustion products discharged into the chimney. The gas burner devices of these devices must be equipped with automatic safety devices in accordance with the requirements provided for in Section. eleven.
The room in which a gas fireplace heater is to be installed must have a window with a window or an exhaust ventilation duct.
When installing these devices, it is necessary to comply with the requirements provided for in clause 6.39.

6.48. The possibility of using and placement conditions for household gas appliances not specified in this section should be determined taking into account the purpose of the appliances, their thermal load, the need to remove combustion products and other parameters regulated by this section.

Description:

Status: not valid (Reissue with changes and additions approved by the State Committee for Construction of the USSR, the State Committee for Construction of Russia and the Ministry of Construction of Russia as of April 4, 1995)

Designation: SNiP 2.04.08-87*

Russian name: Gas supply

Date of introduction: 1988-01-01

Expiration date: 2003-07-01

Designed in:

VNIPIenergoprom

Approved in: Gosstroy USSR (03/16/1987)

Area and conditions of application: These standards apply to the design of new, expanded and reconstructed gas supply systems constructed on the territory of settlements and are intended to supply natural (gas and oil fields) gases and gas-air mixtures with an excess pressure of no more than 1.2 MPa, liquefied hydrocarbon gases with an excess pressure of up to 1. 6 MPa including consumers using these gases as fuel. These standards also apply to the design of inter-settlement gas pipelines and off-site gas pipelines of industrial enterprises using gas as fuel and raw materials. These standards do not apply to the design of gas supply systems for ferrous metallurgy, oil refining and other industries, for which the design of gas supply is carried out in accordance with industry regulations approved in the prescribed manner, as well as to the design of automobile natural gas filling stations, on-site gas pipelines of enterprises using gas as a raw material, and gas equipment for mobile vehicles.

Replaces: SNiP II-37-76
SN 493-77 (regarding design standards)

Replaced with: SNiP 42-01-02 “Gas distribution systems”

Table of contents: 1. General Provisions
2 Gas supply systems and gas pressure standards
3 Estimated gas costs, hydraulic calculation of gas pipelines
Estimated gas costs
4 External gas pipelines and structures
General instructions
Underground gas pipelines
Overhead and ground gas pipelines
Gas pipeline crossings through water barriers and ravines
Gas pipeline crossings across railways, tramways and roads
Placement of shut-off devices on gas pipelines
Gas pipeline structures
Corrosion protection
Gas pipelines made of polyethylene pipes
5 Gas control points (GRP) and gas control units (GRU)
Placement of hydraulic fracturing
GRU deployment
Hydraulic fracturing and gas distribution equipment
Placement of combined regulators
6 Internal gas supply devices
General instructions
Laying gas pipelines
Gas supply to residential buildings
Gas supply to public buildings
Gas supply for production plants and boilers
Infrared burners
7 Gas supply systems for thermal power plants
General instructions
External gas pipelines and devices
Gas control points
Indoor gas equipment
Pipelines and instrumentation
8 Gas filling stations, gas filling points, intermediate cylinder warehouses, automobile gas filling stations
General instructions
Gas filling stations for liquefied gases
Main buildings and structures of the State Tax Service
Placement of buildings and structures of the State Tax Service
Territory planning, roads, requirements for buildings and structures
Drainage devices
Tanks for LPG
Technological equipment of GNS
Gas pipelines, fittings and instrumentation
Water supply, sewerage, heating and ventilation
Gas filling points
Intermediate cylinder warehouses
Automotive liquefied gas filling stations
Power supply, electrical equipment, lightning protection and communications
9 Gas supply with liquefied gases from tank and cylinder units
General instructions
Tank installations
Evaporation and mixing plants
Group cylinder installations
Pipelines for group cylinder and tank installations
Individual cylinder installations
10 Additional requirements for gas supply systems in special natural and climatic conditions
Permafrost soils
Mining territories
Seismic areas
Areas with heaving, subsidence and swelling soils
11 Materials and technical products
General instructions
Steel pipes
Connecting parts and fittings
Protective anti-corrosion materials
Pipes and connecting parts made of polyethylene
Shut-off and control equipment, instruments and other technical products
Additional requirements for special natural and climatic conditions
12 Telemechanization and automated process control systems in gas supply systems
Appendix 1 Classification of gas pipelines included in the gas supply system
Appendix 2 The value of the coefficients of the hourly maximum gas consumption by industry sector
Appendix 3 The value of the simultaneity coefficient Ksim for residential buildings
Appendix 4 canceled
Appendix 5 Hydraulic calculation of gas pipelines
Appendix 6 Removal of combustion products
Appendix 7 Selection of steel pipes for gas supply systems
Appendix 8 Scope of measurements, alarms, automatic regulation and control in gas supply systems of thermal power plants
Appendix 9 Number of apartments that are advisable to be supplied with LPG vapor from one tank installation
Appendix 10 Number of apartments that it is advisable to supply with a gas-air mixture from one tank installation
Appendix 11 Structure, functions and technical means of telemechanization and automated process control systems

List of changes: Giproniigaz of the Ministry of Housing and Utilities of the RSFSR
TsNIIEP of engineering equipment of Gosgrazhdanstroy 117853, Moscow, st. Profsoyuznaya, 93A
Lengiproinzhproekt Lengorispolkom
Mosgazniiproekt of the Moscow City Executive Committee
UkrNIIinzhproekt of the Ministry of Housing and Communal Services of the Ukrainian SSR
VNIPIenergoprom
Institute "Atomteploelektroproekt" Ministry of Energy of the USSR
No. 1 dated 04/25/1989, published in the publication “BST 10-89”
No. 2 dated 10/09/1990, published in the publication “BST 1-91”
No. 3 dated 08/10/1994, published in the publication “BST 10-94”
No. 4 dated 04/04/1995, published in the publication “BST 7-95”

Text of document SNiP 2.04.08-87*

SNiP 2.04.08-87* Gas supply (section "Gas supply of residential buildings")

GAS SUPPLY TO RESIDENTIAL BUILDINGS

6.29. The installation of gas stoves in residential buildings should be provided in kitchens with a height of at least 2.2 m, having a window with a window (transom), an exhaust ventilation duct and natural lighting.

In this case, the internal volume of the kitchen premises must be, m3, not less than: for a gas stove with 2 burners .... 8, “3 “ .... 12, “4 “ .... 15

6.30. In existing residential buildings, it is allowed to install gas stoves:

in rooms, kitchens with a height of at least 2.2 m and a volume not less than that specified in clause 6.29 in the absence of a ventilation duct and the impossibility of using chimneys as such a duct, but if there is a window in the room with a window or transom in the upper part of the window;

in private corridors, if there is a window in the corridor with a window or transom in the upper part of the window, the passage between the slab and the opposite wall must be at least 1 m wide, the walls and ceilings of the corridors made of flammable materials must be plastered, and the living quarters must be separated from corridor with dense partitions and a door;

in kitchens with sloping ceilings with a height in the middle part of at least 2 m, the installation of gas equipment should be provided in that part of the kitchen where the height is at least 2.2 m.

6.31.* In existing residential buildings owned by citizens as personal property, it is allowed to install gas stoves in premises that meet the requirements of paragraphs 6.29 or 6.30, but have a height of less than 2.2 m up to 2 m inclusive, if these premises have a volume of at least than 1.25 times more than the normative value. At the same time, in houses that do not have a dedicated kitchen, the volume of the room. where the gas stove is installed, should be twice as large as specified in clause 6.29.

If it is impossible to meet these requirements, the installation of gas stoves in such premises may be allowed on a case-by-case basis with the approval of the local sanitary inspection authority.

6.32.* The possibility of installing gas stoves, heating and other devices in buildings located outside a residential building is decided by the design organization and operational organization of the gas industry, taking into account specific local conditions, including the availability of gas for these purposes. At the same time, the premises in which the installation of gas appliances is planned must comply with the requirements for the premises of residential buildings where the placement of such appliances is allowed.

6.33. Wooden unplastered walls and walls made of other combustible materials in places where the slabs are installed should be insulated with non-combustible materials: plaster, roofing steel on an asbestos sheet with a thickness of at least 3 mm, etc. The insulation should protrude beyond the dimensions of the slab by 10 cm on each side and at least 80 cm above.

The distance from the stove to the walls of the room insulated with non-combustible materials must be at least 7 cm; the distance between the slab and the opposite wall must be at least 1 m.

6.34. For hot water supply, instantaneous or capacitive gas water heaters should be provided, and for heating - capacitive gas water heaters, small heating boilers or other heating devices designed to operate on gas fuel.

The number of floors of residential buildings in which the installation of the specified gas appliances and apparatus is permitted should be taken in accordance with SNiP 2.08.01-89.

6.35. It is allowed to convert small-sized (small-sized) factory-made heating boilers intended for solid or liquid fuels to gas fuel.

Heating installations converted to gas fuel must be equipped with gas burner devices with automatic safety in accordance with the requirements provided for in Section 11.

In one room it is not allowed to install more than two capacitive water heaters or two small heating boilers or two other heating devices.

6.36. The installation of chimneys must comply with the requirements of SNiP 2.04.05-91 *as for heating stoves. When deciding on the possibility of connecting gas appliances to chimneys, it is permissible to be guided by the data given in reference Appendix 6.

6.37.* Installation of water heaters, heating boilers and heating devices should be provided in kitchens and non-residential premises intended for their placement and meeting the requirements of paragraphs. 6.42* and 6.43. Installation of these devices in bathrooms is not permitted. The issue of the need to move gas water heaters from bathrooms, in which they were placed in accordance with previously existing standards, to kitchens or other non-residential premises of a residential building during the reconstruction of a house or gas supply system, should be decided on a case-by-case basis by the design organization in agreement with local operating organizations gas industry.

In existing residential buildings, it is allowed to provide for the installation of gas heating appliances and heating units in corridors for individual use that meet the requirements of paragraphs. 6.42*and 6.43.

The distance from the protruding parts of gas burners or fittings to the opposite wall must be at least 1 m.

6.38. Installation of gas instantaneous water heaters should be provided on walls made of non-combustible materials at a distance of at least 2 cm from the wall (including from the side wall).

If there are no walls made of non-combustible materials in the room, it is allowed to install a flow-through water heater on plastered, as well as on walls lined with non-combustible or difficult-to-combustible materials at a distance of at least 3 cm from the wall.

The surface of fire-resistant walls should be insulated with roofing steel over an asbestos sheet with a thickness of at least 3 mm. The insulation should protrude 10 cm beyond the dimensions of the water heater body.

6.39. The installation of gas heating boilers, heating devices and capacitive gas water heaters should be provided near walls made of non-combustible materials at a distance of at least 10 cm from the wall.

If there are no walls made of non-combustible materials in the room, it is allowed to install the above-mentioned heating devices near the walls, protected in accordance with the instructions of clause 6.38, at a distance of at least 10 cm from the wall.

6.40. The horizontal clear distance between the protruding parts of the instantaneous water heater and the gas stove should be at least 10 cm.

6.41.* When installing a gas stove and instantaneous water heater in the kitchen, the volume of the kitchen should be taken in accordance with clause 6.29.

When installing a gas stove and a cylinder water heater, a gas stove and a heating boiler or heating device in the kitchen, as well as a gas stove with built-in devices for heating water (heating, hot water supply), the volume of the kitchen should be 6 m3 greater than the volume provided by l. 6.29.

6.42.* The room intended to accommodate a gas water heater, as well as a heating boiler or heating apparatus, the combustion products of which are discharged into the chimney, must have a height of at least 2 m. The volume of the room must be at least 7.5 m3 when installing one device and not less than 13.5 m3 when installing two heating devices.

6.43. The kitchen or room where boilers, appliances and gas water heaters are installed must have a ventilation duct. For air flow, a grille or gap between the door and the floor with a clear cross-section of at least 0.02 m2 should be provided at the bottom of the door or wall opening into the adjacent room.

6.44.* It is not allowed to place all gas appliances in the basement floors (basements), and in the case of gas supply, in the basement and ground floors of buildings for any purpose.

Note. The requirements of this paragraph do not apply to residential buildings owned by citizens as personal property if the basements of these houses have natural light and their gas supply is from natural gas.

6.45. It is allowed to convert heating and heating-cooking furnaces to gas fuel, provided that:

stoves, smoke and ventilation ducts meet the requirements of departmental standards for the installation of heating stoves converted to gas fuel, approved in the prescribed manner;

gas burners installed in the furnaces of heating and heating-cooking furnaces are equipped with automatic safety systems in accordance with the requirements of GOST 16569-86.

6.46. The fireboxes of gasified stoves should be provided, as a rule, on the side of the corridor or other non-residential (non-office) premises.

If it is impossible to meet the specified requirement, it is allowed to provide fireboxes for gasified stoves on the side of residential (office) premises. In this case, the gas supply to the furnaces should be provided by independent branches, on which, at the point of connection to the gas pipeline, a shut-off device should be installed outside the above premises.

The rooms into which the fireboxes of gasified heating and heating-cooking stoves open must have an exhaust ventilation duct or a window with a window, or a door opening onto a non-residential premises or vestibule. A passage at least 1 m wide must be provided in front of the furnace.

6.47. For space heating, it is allowed to install gas fireplaces, air heaters and other factory-made appliances with combustion products discharged into the chimney. The gas burner devices of these devices must be equipped with automatic safety devices in accordance with the requirements provided for in Section. eleven.

The room in which a gas fireplace heater is to be installed must have a window with a window or an exhaust ventilation duct.

When installing these devices, it is necessary to comply with the requirements provided for in clause 6.39.

6.48. The possibility of using and placement conditions for household gas appliances not specified in this section should be determined taking into account the purpose of the appliances, their thermal load, the need to remove combustion products and other parameters regulated by this section.

"Instructions for the placement of thermal units" Ministry of Construction of Russia 09/13/1996 No. 18-69

Instructions for the placement of thermal units intended for heating and hot water supply of single-family or semi-detached residential buildings

1 area of use

1.1. The requirements of this instruction must be observed when designing premises
in single-family or semi-detached residential buildings that house thermal units (heat generators) using natural gas as fuel in accordance with GOST 5542-87, intended for heating and hot water supply of these buildings.

1.2. The provisions of this document are mandatory for all enterprises, organizations and individuals carrying out design and construction, regardless of their form of ownership
and accessories.

SNiP 2.04.08-87* “Gas supply”

SNiP 2.04.05-91* “Heating, ventilation and air conditioning”

SNiP 2.08.01-89 “Residential buildings”

GOST 5542-87 “Natural flammable gases for industrial and municipal purposes. Technical specifications"

“Safety rules in the gas industry”

NPB-106-95 “Individual residential buildings. Fire safety requirements"

3. Definitions

The following terms and definitions are used throughout this document:

3.1. blocked residential building - an apartment-type building consisting of two or more apartments,
each of which has direct access to the apartment area
(according to SNiP 2.08.01-89);

3.2. ground floor - a floor when the floor level of the room is below the planning level of the ground by more than half the height of the room (according to SNiP 2.08.01-89).

4. General provisions

4.1. As sources of thermal energy, automated heat generators of full factory readiness with a coolant temperature - water up to 115º C and a coolant pressure up to 1.0 MPa, produced in domestic or foreign countries should be accepted,

having permission to use them in the prescribed manner.

4.2. The placement of thermal units is provided:

In the kitchen, with a heating unit power of up to 60 kW inclusive,
regardless of the presence of a gas stove and gas water heater;

In a separate room on any floor (including the basement or basement)
with their total power for heating and hot water supply systems up to 150 kW inclusive;

In a separate room on the first, ground or basement floor, as well as in a room attached to a residential building, with their total capacity for the heating and hot water supply system up to 500 kW inclusive.

5. Planning and design solutions

5.1. When placing a gas stove or instantaneous water heater for hot water supply in the kitchen
and a thermal unit for heating with a power of up to 60 kW, the kitchen room must meet the following requirements:

Height not less than 2.5 meters;

The volume of the room is at least 15 cubic meters. m. plus 0.2 cubic meters. m per 1 kW of power of a thermal unit for heating;

In the kitchen, ventilation should be provided at the rate of: hood in the volume of 3 times the air exchange of the room per hour, inflow in the volume of the hood plus the amount of air
for gas combustion:

The kitchen should have a window with a window. For air flow it is necessary to provide
at the bottom of the door there is a grille or a gap with a clear cross-section of at least 0.025 square meters. m.

5.2. When placing thermal units with a total power of up to 150 kW in a separate room located on any floor of a residential building, the room must meet the following requirements:

Height not less than 2.5 meters;

Volume and area from the conditions for convenient maintenance of thermal units and auxiliary equipment, but not less than 15 cubic meters. meters;

Natural lighting based on glazing 0.03 sq. m per 1 cubic meter m of premises;

5.3. When placing thermal units with a total power of up to 500 kW in a separate room
on the ground floor, in the basement or basement of a residential building, the premises must meet the following requirements:

Height not less than 2.5 meters;

The room must be separated from adjacent rooms by enclosing walls
with a fire resistance limit of 0.75 hours, and the limit of fire spread throughout the structure is zero;

Ventilation in the room should be provided at the rate of: exhaust volume
3 times the air exchange of the room per hour, the influx in the exhaust volume plus the amount of air for gas combustion;

The volume and area of the room from the conditions of convenient thermal units and auxiliary equipment.

5.4. When placing thermal units with a total thermal power of up to 500 kW in an extension
for residential buildings, the extension premises must meet the following requirements:

The extension must be located near the blank part of the building wall with a horizontal distance from window and door openings of at least 1 meter;

The wall of the extension should not be connected to the wall of the residential building;

Enclosing walls and extension structures must have a fire resistance limit of 0.75 hours,
and the limit of fire spread through the structure is zero;

Height of at least 2.5 meters;

The volume and area of the room from the conditions of convenient thermal units and auxiliary equipment;

Natural lighting based on glazing 0.03 sq. m per 1 cubic. m of premises;

Ventilation in the room should be provided at the rate of: exhaust volume
3 times the air exchange of the room per hour, the influx in the exhaust volume plus the amount of air for gas combustion.

5.5. When placing heat generators in a separate room on the first, ground or basement floors, it must have access directly to the outside. It is allowed to provide a second exit to the utility room, the door must be fireproof
Type 3.

6. Gas supply

6.1. The design of the gas supply system for thermal units using natural gas as fuel should be carried out in accordance with the requirements of SNiP 2.04.08-87*
and “Safety rules in the gas industry.”

6.2. Natural gas must be supplied from a gas pipeline with a pressure of up to 0.003 MPa
(0.03 kgf/cm2).

6.3. The gas pipeline should be entered directly into the room where the heating units are installed.

6.4. The removal of flue gases should be provided in accordance with the requirements
SNiP 2.04.05-91*.

It is allowed to provide for the removal of flue gases from heat generators equipped with a built-in installation for forced removal of flue gases through the outer wall of the room.

Requirements for rooms with gas hot water boilers

When placing thermal units with a total power of up to 150 kW in a separate room located on any floor of a residential building, the room must meet the following requirements:

The height of the room is at least 2.5 meters;

The volume and area of the room from the conditions of convenient maintenance, but not less than 15 m3;

The room must be separated from adjacent rooms by enclosing walls with a fire resistance limit of 0.75 hours, and the limit of fire spread through structures is zero;

Natural lighting based on glazing 0.03 m2 per 1 m3 of room;

The room must be provided with ventilation at the rate of: exhaust in the volume of 3 times the air exchange of the room per hour, inflow in the exhaust volume plus the amount of air required for combustion (minimum area of the lower opening (inflow) for air supply at the rate of 5 cm2 for every 1, 16 kW of equipment power, but not less than 150 cm2, the area of the upper ventilation opening (exhaust) is selected at the rate of 10 cm2 per 1.7 kW of installed power);

When placed in a separate room on the first, ground or basement floors, it must have direct access to the outside. It is allowed to provide a second exit to the utility room, the door must be fireproof type 3;

Buildings equipped with autonomous water supply and heat supply systems must have grounding loops. The entry into the building of an underground gas pipeline must pass through an insulating flange.

The boiler room must be equipped with a sewerage system or a drainage pit with a pump.

INTERNAL GAS SUPPLY DEVICES

GENERAL INSTRUCTIONS

6.1. The provisions of this section apply to design of gas pipelines and gas equipment, placed inside buildings and structures for various purposes.

Possibility of installing gas equipment and laying gas pipelines in specific buildings should be determined in accordance with the building codes and regulations for the design of the relevant buildings.
LAYING GAS PIPELINES

6.2. Gas pipelines laid inside buildings and structures should be made of steel pipes that meet the requirements of Section. eleven.

To connect mobile units, portable gas burners, gas appliances, instrumentation and automation devices, it is allowed to provide rubber and rubber-fabric hoses. When choosing hoses, one should take into account their resistance to the transported gas at a given pressure and temperature.

6.3. Pipe connections should usually be made by welding. Detachable (threaded and flanged) connections may be provided only in places where shut-off valves, gas appliances, instrumentation, pressure regulators and other equipment are installed.

The installation of detachable connections of gas pipelines should be provided in places accessible for inspection and repair.

6.4. The laying of gas pipelines inside buildings and structures should, as a rule, be open. It is allowed to provide for the hidden installation of gas pipelines (except for LPG gas pipelines and gas pipelines inside residential buildings and public buildings of a non-industrial nature) in the grooves of the walls, covered with easily removable shields that have holes for ventilation.

6.5. In the production premises of industrial enterprises, including boiler houses, buildings of consumer service enterprises for industrial purposes and public catering, as well as laboratories, it is allowed to lay gas supply pipelines to individual units and gas appliances in the floors of a monolithic structure, followed by sealing the pipes with cement mortar. In this case, it is necessary to provide for painting the pipes with oil or nitro-enamel waterproof paints.

At the points where the gas pipeline enters and exits the floor, cases should be provided, the ends of which should protrude above the floor by at least 3 cm.

6.6. In the production premises of industrial enterprises, it is allowed to lay gas pipelines in the floor in channels covered with sand and covered with slabs.

The design of the ducts must exclude the possibility of gas spreading under the floor.

Laying gas pipelines in channels is not allowed in places where, due to production conditions, substances causing corrosion of pipes may enter the channels.

6.7. Channels intended for laying gas pipelines, as a rule, should not intersect with other channels.

If it is necessary to cross channels, provision should be made for the installation of sealing bridges and the laying of gas pipelines in cases made of steel pipes. The ends of the cases must be extended beyond the jumpers by 30 cm in both directions.

6.8. When laid together with other pipelines on common supports, gas pipelines should be placed above them at a distance that ensures ease of inspection and repair.

6.9. The laying of gas pipelines in transit through industrial premises where gas is not used is allowed for low and medium pressure gas pipelines, provided that no fittings are installed on the gas pipeline and unhindered 24-hour access to these premises is provided for personnel servicing the gas pipeline.

6.10. It is not allowed to provide for the laying of gas pipelines in premises classified as explosion and fire hazard categories A and B; in explosive zones of all premises; in basements; in warehouse buildings of explosive and flammable materials; in the premises of substations and distribution devices; through ventilation chambers, shafts and channels; elevator shafts; waste disposal rooms; chimneys; through rooms where the gas pipeline may be subject to corrosion, as well as in places of possible exposure to aggressive substances and in places where gas pipelines may be washed by hot combustion products or come into contact with heated or molten metal.

6.11. For internal gas pipelines experiencing temperature effects, it is necessary to provide for the possibility of compensating for temperature deformations.

6.12. For gas pipelines transporting wet gas and laid in rooms where the air temperature may be below 3 °C, thermal insulation made of non-combustible materials should be provided.

6.13. Shut-off devices on gas pipelines in production premises of industrial and agricultural enterprises, industrial consumer service enterprises should be provided with:

at the gas pipeline entrance indoors;

on branches to each unit;

in front of burners and igniters;

on purge pipelines, at places where they are connected to gas pipelines.

If there is a gas meter or gas control unit inside the room, located at a distance of no more than 10 m from the gas pipeline entry point, the shut-off device at the input is considered to be a valve or tap in front of the gas pipeline or meter.

Installation of fittings on gas pipelines laid in channels, in concrete floors or in wall grooves is not allowed.

6.14.* The need to meter gas consumption and the choice of metering system at gas supply facilities must be determined in accordance with the instructions of the “Rules for the use of gas in the national economy” approved by the Ministry of Gas Industry and the “General Provisions on the Procedure for Accounting and Control of Fuel, Electrical and Heat Energy Consumption for Industrial , transport, agricultural and public utility enterprises and organizations” approved by the State Committee for Science and Technology, the State Planning Committee of the USSR, and the State Standard.

According to the decision of the executive authorities of the constituent entities of the Russian Federation on the procedure for recording gas consumption by consumers and regulating gas prices in gasified residential buildings, as well as during gasification of greenhouses, bathhouses and other household buildings, it must be possible to record the gas consumption of each subscriber by installing it on the gas pipeline (in apartment, individual house) gas consumption meter - meter.

6.15. Gas flow metering devices should be placed in gas distribution centers or gasified premises. It is allowed to place gas flow metering devices in other rooms of at least II degree of fire resistance that have exhaust ventilation.

No more than two gas meters can be installed in parallel on one gas pipeline.

6.16. The laying of gas pipelines in residential buildings should be provided in non-residential premises.

In existing and reconstructed residential buildings, it is allowed to provide for the transit laying of low-pressure gas pipelines through living rooms if no other installation is possible. Transit gas pipelines within residential premises should not have threaded connections or fittings.

It is not allowed to provide gas pipeline risers in living rooms and sanitary facilities.

6.17.* The installation of shut-off devices on gas pipelines laid in residential buildings and public buildings (with the exception of public catering establishments and consumer service enterprises of an industrial nature) should be provided for:

to disconnect risers serving more than five floors;

in front of the meters (if a disconnecting device at the input cannot be used to turn off the meter);

in front of each gas appliance, stove or installation;

on branches to heating stoves or appliances in accordance with the requirements of clause 6.46.

On gas supply pipelines to cooking boilers, restaurant stoves, heating stoves and other similar equipment, it is necessary to install two shut-off devices in series: one to turn off the device (equipment) as a whole, the other to turn off the burners.

On gas supply pipelines to gas appliances that have a shut-off device in front of the burners in their design (gas stoves, water heaters, stove burners, etc.), it is necessary to install one shut-off device.

The need to install devices for disconnecting risers (entrances) of 5-story or less residential buildings is decided by the design organization depending on local specific conditions, including the number of floors of buildings and the number of apartments to be disconnected in the event of emergency and other work.

Devices provided for disconnecting risers (entrances) should be installed, whenever possible, outside the building.

6.18. The distance from gas pipelines laid openly and in the floor indoors to building structures, process equipment and pipelines for other purposes should be taken from the condition of ensuring the possibility of installation, inspection and repair of gas pipelines and fittings installed on them, while gas pipelines should not cross ventilation grilles, window and doorways. In industrial premises, it is allowed to cross light openings filled with glass blocks, as well as lay a gas pipeline along the sashes of non-opening windows.

6.19. The minimum clear distances between a gas pipeline laid along the wall of a building and communication and wired broadcasting structures should be taken in accordance with the “Safety Rules for Work on Cable Communication and Wired Broadcasting Lines” approved by the USSR Ministry of Communications in the prescribed manner.

6.20. The distances between gas pipelines and electrical utilities located indoors, at points of convergence and intersection, should be taken in accordance with the PUE.

6.21. The laying of gas pipelines in places where people pass should be provided at a height of at least 2.2 m from the floor to the bottom of the gas pipeline, and if there is thermal insulation - to the bottom of the insulation.

6.22.* Fastening of openly laid gas pipelines to walls, columns and ceilings inside buildings, frames of boilers and other production units should be provided using brackets, clamps, hooks or hangers, etc. at a distance that allows for inspection and repair of the gas pipeline and the fittings installed on it.

The distance between the support fastenings of gas pipelines should be determined in accordance with the requirements of SNiP 2.04.12-86.

6.23. The laying of gas pipelines transporting wet gas (except for the vapor phase of low-pressure LPG) should be provided with a slope of at least 3 o/oo.

If there is a gas meter, the slope of the gas pipeline should be provided from the meter.

6.24. Vertical gas pipelines at intersections of building structures should be laid in cases. The space between the gas pipeline and the case must be sealed with tarred tow, rubber bushings or other elastic material. The end of the casing must protrude above the floor by at least 3 cm, and its diameter must be taken from the condition that the annular gap between the gas pipeline and the casing is at least 5 mm for gas pipelines with a nominal diameter of no more than 32 mm and at least 10 mm for gas pipelines of larger diameter.

6.25. Internal gas pipelines, including those laid in channels, should be painted. For painting, waterproof paints and varnishes should be used.

6.26. Gas appliances and gas burners should be connected to gas pipelines, as a rule, with a rigid connection.

Connection to the gas pipeline of gas appliances, laboratory burners, as well as portable and mobile gas-burning devices and units installed in the workshops of industrial enterprises may be provided after the shut-off valve with rubber-fabric hoses. Rubber-fabric hoses for connecting household gas appliances and laboratory burners should not have butt joints.

6.27. On gas pipelines of industrial (including boiler houses), agricultural enterprises, consumer service enterprises of a production nature, purge pipelines should be provided from the sections of the gas pipeline that are most remote from the point of entry, as well as from bends to each unit before the last shut-off device along the gas flow.

It is allowed to combine purge pipelines from gas pipelines with the same gas pressure, with the exception of purge pipelines for gases with a density greater than that of air.

The diameter of the purge pipeline should be at least 20 mm.

After the shut-off device, a fitting with a tap for sampling should be provided on the purge pipeline, if a fitting for connecting an igniter cannot be used for this purpose.

In some cases (for example, for cutting and welding stations, small industrial furnaces) with a supply gas pipeline with a diameter of no more than 32 mm, it is allowed to install a shut-off device with a blind fitting instead of purge pipelines.

6.28. The distance from the end sections of the purge pipelines to the intake ventilation devices must be at least 3 m.

When the building is located outside the lightning protection zone, the outlets of the purge pipelines should be grounded.
GAS SUPPLY TO RESIDENTIAL BUILDINGS

In this case, the internal volume of kitchen premises must be, m3, not less than:

for gas stove with 2 burners 8

« « « « 3 « 12

« « « « 4 « 15

6.30. In existing residential buildings, it is allowed to install gas stoves:

in kitchen premises with a height of at least 2.2 m and a volume not less than that specified in clause 6.29 in the absence of a ventilation duct and it is impossible to use chimneys as such a duct, but if there is a window in the room with a window or transom in the upper part of the window;

6.31.* In existing residential buildings owned by citizens as personal property, it is allowed to install gas stoves in premises that meet the requirements of paragraphs. 6.29 or 6.30, but having a height of less than 2.2 m up to 2 m inclusive, if these premises have a volume of at least 1.25 times the standard. Moreover, in houses that do not have a dedicated kitchen, the volume of the room where the gas stove is installed must be twice as large as specified in clause 6.29.

If it is impossible to meet these requirements, the installation of gas stoves in such premises may be allowed on a case-by-case basis with the approval of the local sanitary inspection authority.

The distance from the stove to the walls of the room insulated with non-combustible materials must be at least 7 cm; the distance between the slab and the opposite wall must be at least 1 m.

The number of floors of residential buildings in which the installation of the specified gas appliances and apparatus is permitted should be taken in accordance with SNiP 2.08.01-89.

6.35. It is allowed to convert small-sized (small-sized) factory-made heating boilers intended for solid or liquid fuels to gas fuel.

Heating installations converted to gas fuel must be equipped with gas burner devices with automatic safety in accordance with the requirements provided for in Section. eleven.

In one room it is not allowed to install more than two capacitive water heaters or two small heating boilers or two other heating devices.

6.36. The installation of chimneys must comply with the requirements of SNiP 2.04.05-91* as for heating stoves. When deciding on the possibility of connecting gas appliances to chimneys, it is permissible to be guided by the data given in reference Appendix 6.

The distance from the protruding parts of gas burners or fittings to the opposite wall must be at least 1 m.

6.38. Installation of gas instantaneous water heaters should be provided on walls made of non-combustible materials at a distance of at least 2 cm from the wall (including from the side wall).

6.40. The horizontal clear distance between the protruding parts of the instantaneous water heater and the gas stove should be at least 10 cm.

6.41.* When installing a gas stove and instantaneous water heater in the kitchen, the volume of the kitchen should be taken in accordance with clause 6.29.

When installing a gas stove and a cylinder water heater, a gas stove and a heating boiler or heating device in the kitchen, as well as a gas stove with built-in devices for heating water (heating, hot water supply), the volume of the kitchen must be 6 m3 greater than the volume provided for in clause 6.29.

6.44.* It is not allowed to place all gas appliances in the basement floors (basements), and for LPG gas supply - in the basement and ground floors of buildings for any purpose.

6.45. It is allowed to convert heating and heating-cooking furnaces to gas fuel, provided that:

stoves, smoke and ventilation ducts meet the requirements of departmental standards for the construction of heating stoves converted to gas fuel, approved in the prescribed manner;

gas burners installed in the furnaces of heating and heating-cooking furnaces are equipped with automatic safety systems in accordance with the requirements of GOST 16569-86.

6.46. The fireboxes of gasified stoves should be provided, as a rule, on the side of the corridor or other non-residential (non-office) premises.

The room in which a gas fireplace or heater is to be installed must have a window with a window or an exhaust ventilation duct.

When installing these devices, it is necessary to comply with the requirements provided for in clause 6.39.

RESULTS OF COMBUSTION PRODUCTS

1. The removal of combustion products from household gas appliances, stoves and other household gas equipment, the design of which provides for the removal of combustion products into the chimney, should be provided from each appliance, unit or stove through a separate chimney.

In existing buildings, it is allowed to provide for the connection to one chimney of no more than two water heaters or heating stoves located on the same or different floors of the building, provided that combustion products are introduced into the chimney at different levels, no closer than 0.75 m from one another, or at the same level with a device in the chimney for cutting to a height of at least 0.75 m.

2. In existing buildings in the absence of chimneys, it is allowed to install attached chimneys.

3. It is allowed to connect to the chimney of a periodically operating heating stove a gas water heater used for hot water supply, or another gas appliance that does not operate continuously, provided that it operates at different times and the chimney cross-section is sufficient to remove combustion products from the connected appliance.

Connecting the smoke exhaust pipe of a gas appliance to the chimney revolutions of a heating stove is not allowed.

4. The cross-sectional area of the chimney should not be less than the area of the gas appliance pipe connected to the chimney. When connecting two appliances, stoves, etc. to a chimney, the cross-section of the chimney should be determined taking into account their simultaneous operation. The structural dimensions of chimneys must be determined by calculation.

5. Non-household gas appliances (restaurant stoves, cooking boilers, etc.) are allowed to be connected to both separate and common chimneys.

It is allowed to provide connecting smoke exhaust pipes common to several units.

The introduction of combustion products into a common chimney for several appliances should be provided at different levels or at the same level with the cutting device in accordance with paragraph 1.

The cross-sections of chimneys and connecting pipes must be determined by calculation based on the condition of simultaneous operation of all devices connected to the chimney.

6.* Chimneys must be vertical, without ledges. A slope of chimneys from the vertical is allowed up to 30° with a sideways deviation of up to 1 m, provided that the cross-sectional area of the inclined sections of the chimney is not less than the cross-section of the vertical sections.

7. To remove combustion products from restaurant stoves and other non-household gas appliances, it is allowed to provide horizontal sections of chimneys with a total length of no more than 10 m.

It is allowed to provide chimneys in the ceiling with a fire-prevention cutting device for combustible ceiling structures.

8. Connection of gas water heaters and other gas appliances to chimneys should be provided with pipes made of roofing steel.

The total length of connecting pipe sections in new buildings should be no more than 3 m, in existing buildings - no more than 6 m.

The slope of the pipe should be at least 0.01 towards the gas appliance.

On smoke exhaust pipes it is allowed to provide no more than three turns with a radius of curvature not less than the diameter of the pipe.

Below the point of connection of the smoke exhaust pipe from the appliance to the chimneys, a “pocket” device with a hatch for cleaning should be provided.

Smoke exhaust pipes laid through unheated rooms must, if necessary, be covered with thermal insulation.

9. The distance from the connecting smoke exhaust pipe to the ceiling or wall made of non-combustible materials should be at least 5 cm, to wooden plastered ceilings and walls - at least 25 cm. The specified distance can be reduced from 25 to 10 cm, provided that wooden plastered walls or ceilings are upholstered roofing steel on an asbestos sheet 3 mm thick. The upholstery should protrude beyond the dimensions of the chimney by 15 cm on each side.

10. When connecting one device to the chimney, as well as devices with draft stabilizers, dampers are not provided on the smoke exhaust pipes.

When connecting several appliances to a common chimney: restaurant stoves, boilers and other gas appliances that do not have draft stabilizers, dampers (dampers) with a hole with a diameter of at least 15 mm must be provided on the smoke exhaust pipes from the appliances.

11. Dampers installed on chimneys from boilers must have holes with a diameter of at least 50 mm.

12. Chimneys from gas appliances in buildings must be led out:

above the boundary of the wind support zone, but not less than 0.5 m above the roof ridge when they are located (counting horizontally) no further than 1.5 m from the roof ridge;

level with the roof ridge, if they are located at a distance of up to 3 m from the roof ridge;

not lower than a straight line drawn from the ridge down at an angle of 10° to the horizontal, when the pipes are located at a distance of more than 3 m from the ridge of the roof.

In all cases, the height of the pipe above the adjacent part of the roof must be at least 0.5 m, and for houses with a combined roof (flat roof) - at least 2.0 m.

The installation of umbrellas and deflectors on chimneys is not allowed.

13.* The removal of combustion products from gasified installations of industrial enterprises, boiler houses, and public service enterprises may be provided through steel chimneys.
APPENDIX 7*
Mandatory
SELECTION OF STEEL PIPES FOR GAS SUPPLY SYSTEMS

1. Steel pipes for gas supply systems with pressure up to 1.6 MPa (16 kgf/cm2), depending on the design temperature of the outside air of the construction area and the location of the gas pipeline relative to the ground surface, should be taken:

according to table 1* - for external above-ground gas pipelines laid in areas with a design temperature of external air not lower than minus 40 °C, as well as underground and internal gas pipelines that are not cooled to a temperature below minus 40 °C;

according to table 2 - for above-ground gas pipelines laid in areas with a design outside air temperature below minus 40 °C and underground gas pipelines that can be cooled to a temperature below minus 40 °C.

2. For gas supply systems, you should accept pipes made, as a rule, of ordinary quality carbon steel in accordance with GOST 380-88 and high-quality steel in accordance with GOST 1050-88.

3. For gas pipelines of the liquid phase of LPG, seamless pipes should, as a rule, be used.

It is allowed to use electric-welded pipes for these gas pipelines. In this case, pipes with a diameter of up to 50 mm must undergo 100% inspection of the weld using non-destructive methods, and pipes with a diameter of 50 mm or more must also undergo a tensile test of the weld.

Table 1*

Steel pipes for the construction of external above-ground gas pipelines laid in areas with a design temperature of outside air not lower than minus 40 °C, as well as underground and internal gas pipelines that are not cooled to a temperature below minus 40 °C

Standard or specification for pipes	Steel grade, steel standard	Pipe outer diameter (incl.), mm
1. Electric welded longitudinal welded GOST 10705-80 (group B) "Technically skies Slovenia " and GOST 10704-91 "Assortment"	VSt2sp, VSt3sp no less than 2nd category GOST 380-88; 10, 15, 20 GOST 1050-88
2. Electric welded TU 14-3-943-80	10 GOST 1050-88	219-530
3. Electric welded for main gas and oil pipelines (straight seam and spiral welded) GOST 20295-85	VSt3sp no less e 2nd category (K38) GOST 380-88; 10 ( K34 ), 15 (K38), 20 (K42) GOST 1050-88	According to GOST 20295-74
4. Electric welded straight-seam GOST 10706-76 (group B) “Technical requirements” and GOST 10704-91 “Assortment”	VSt2sp, VSt3sp not me not 2nd category GOST 380-88
5. Electros welded with a spiral seam GOST 8696-74 (group B)	VSt2sp, VSt3sp no less than 2nd category GOST 380-88
6. Seamless hot-deformed GOST 8731-87 (group B and D) “Technical requirements” and GOST 8732-78 “Assortment”	10, 20 GOST 1050-88
7. Seamless cold-deformed, heat-deformed GOST 8733-87 (gr Unit B and D) “Technical Requirements” and GOST 8734-75 “Assortment”	10, 20 GOST 1050-88
8. Electric welded spiral welded TU 14-3-808-78	TU 14-3-808-78	530-820; 1020; 1220
9. Seamless hot-deformed according to TU 14-3-190-82 (only for thermal power plants)	10, 20 GOST 1050-88
Notes: 1. Pipes according to paragraphs. 6 and 7 follows when change like For example, for gas pipelines of the liquid phase of LPG. 2. Excluded. 3. For heat fishing elect Rostanz I'm working would be used from steel 20 in areas with a design temperature of up to minus 30 ° C

4.* Pipes in accordance with GOST 3262-75 may be used for the construction of external and internal low-pressure gas pipelines. Pipes in accordance with GOST 3262-75 with a nominal diameter of up to 32 mm inclusive. may be used for the construction of impulse gas pipelines with pressures up to 1.2 MPa (12 kgf/cm2) inclusive. In this case, bent sections of pulse gas pipelines must have a bend radius of at least 2De and the temperature of the pipe wall during operation should not be below 0 °C. 5.* Pipes with a spiral seam in accordance with TU 102-39-84 with an anti-corrosion coating in accordance with TU 102-176-85 are allowed to be used only for underground inter-settlement natural gas pipelines with a pressure of up to 1.2 MPa (12 kgf/cm2) in areas with a design outside air temperature up to minus 40 °C incl. At the same time, do not use these pipes for elastic bending (rotation) of a gas pipeline in the vertical and horizontal planes with a radius of less than 1500 times the pipe diameter, as well as for laying gas pipelines in settlements. 6. Possibility of using pipes according to state standards and technical conditions given in table. 1 and 2* of this appendix, but made of semi-quiet and boiling steel, is regulated by clauses 11.7, 11.8. 7. Pipes in accordance with GOST 8731 - 87, made from ingots, should not be used without carrying out 100% non-destructive testing of the pipe metal. When ordering pipes in accordance with GOST 8731-87, indicate that pipes according to this standard, made from ingots, should not be supplied without 100% control by non-destructive methods.