2-3215/2015

SOLUTION

IN THE NAME OF THE RUSSIAN FEDERATION

Oktyabrsky District Court of the city of Kirov, composed of

judge S.A. Starodumova,

under the secretary E.S. Kultysheva,

Having considered in open court a civil case at the suit of G.A. Prokasheva. to JSC Gazprom gazoraspredelenie Kirov on the obligation to replace the expired gas pipeline,

U S T A N O V I L:

Prokasheva G.A. applied to the court with a statement of claim against OAO Gazprom Gazoraspredelenie Kirov represented by its branch in Kirov on the obligation to replace the expired gas pipeline. In support of the claims, she indicated that the plaintiff lives in a house at:, built in 1972. In the same year, a gas pipeline to this house was put into operation, i.e. the gas pipeline was laid 43 years ago. According to clause 5.3.7 of the Safety Rules for facilities using liquefied petroleum gases, approved. By the Decree of the Federal Mining and Industrial Supervision of Russia dated May 27, 2003 No. 40, existing external gas pipelines must be subject to periodic by-passes, instrumental inspection, technical condition diagnostics, as well as current and overhaul repairs. Underground gas pipelines with a service life of: steel - 40 years; polyethylene - 50 years. Gas equipment (technical devices) are subject to diagnostics after the service life established by the manufacturer, but not more than 20 years of operation. In the event of a gas pipeline failure due to a leak, if there is damage to the gas pipeline, an explosion at home may occur. They can appear from loose connections, from damage to the gas pipeline itself (corrosion, panic effects). Diagnostics involves checking the wall thickness of the gas pipeline, the presence of corrosion. The gas pipeline can be laid not only by the underground method, but by aboveground and aboveground ones. According to clause 4.3 of SNiP 2.04.08-87 "Gas supply", the laying of external gas pipelines on the territory of settlements should be provided, as a rule, underground in accordance with the requirements of SNiP 2.07.01-89 *. Aboveground and aboveground laying of external gas pipelines is allowed inside residential areas and courtyards, as well as on other separate sections of the route. Clause 4.22. * Of the same SNiP stipulates that above-ground gas pipelines should be laid on free-standing supports, stacks and columns made of non-combustible materials and along the walls of buildings. In this case, it is allowed to lay: on free-standing supports, columns, ramps and a stack of gas pipelines of all pressures; along the walls of industrial buildings with rooms of categories B, D and D - gas pipelines with a pressure of up to 0.6 MPa (6 kgf / cm2); on the walls of public buildings and residential buildings not lower than III-IIIa degree of fire resistance - gas pipelines with a pressure of up to 0.3 MPa (3 kgf / cm2); on the walls of public buildings and residential buildings of IV-V degrees of fire resistance - low pressure gas pipelines with a nominal pipe diameter, as a rule, no more than 50 mm, and when placing gas pressure regulators on the outer walls and other structures of these buildings - gas pipelines with a pressure of up to 0.3 MPa - in the areas before entering them into the regulators. The transit laying of gas pipelines is prohibited: along the walls of buildings of children's institutions, hospitals, schools and entertainment enterprises - gas pipelines of all pressures; along the walls of residential buildings - medium and high pressure gas pipelines. According to clause 4.1 * of the Code of Rules “Gas distribution systems. Updated version of SNiP 42-01-2002 ", design, construction, overhaul, expansion and technical re-equipment of gas distribution and gas consumption networks should be carried out in accordance with the gas supply schemes developed as part of the federal, interregional and regional gasification programs of the constituent entities of the Russian Federation in order to ensure the envisaged these programs of the level of gasification of housing and communal services, industrial and other organizations. The construction of gas distribution networks and the reconstruction of worn-out steel gas pipelines should be carried out: using mainly polymer pipes and fittings (for example, made of polyethylene and its modifications, polyamides); with the installation of regulating and safety devices at each consumer; with laying gas pipelines in places of limited access. In gas consumption networks, the safety of gas use must be ensured by technical means and devices. When designing gas pipelines made of polyethylene and steel pipes, it is allowed to provide for their connection to existing gas pipelines without reducing the pressure. In accordance with clause 4.16 *, the operability and safety of operation of gas distribution and gas consumption networks and LPG facilities must be maintained and maintained through maintenance and repairs in accordance with operational documents, technical regulations, national standards and sets of rules approved by federal executive authorities, and other regulatory legal documents. The connection of gas pipelines without pressure reduction should be carried out using special equipment that ensures the safety of work on technologies and production instructions, approved in accordance with the established procedure. As indicated in 5.1.2 *, gas pipelines should be laid underground. In exceptional cases, above-ground laying of gas pipelines is allowed along the walls of buildings inside residential yards and quarters, as well as on certain sections of the route, including on sections of crossings through artificial and natural barriers, when crossing engineering networks. Such a laying of gas pipelines is allowed to be provided with appropriate justification and carried out in places where access of unauthorized persons to the gas pipeline is restricted. To the plaintiff's numerous requests to the defendant about replacing the old underground gas pipeline with a gas pipeline along the facade of the building, the defendant replied that the gas pipeline was diagnosed in 2010 by a specialized organization Kostromadiagnostika LLC, and according to the conclusion, the gas pipeline is suitable for further operation. However, the conclusion itself was not presented. The presence of a gas pipeline on the land plot is the reason for the establishment, in accordance with the Rules for the Protection of Gas Distribution Networks, approved by Decree of the Government of the Russian Federation of November 20, 2000 N 878, a security zone for the gas pipeline, within the boundaries of which it is prohibited (clause 14 of the Rules): to build production facilities; arrange warehouses, dig and cultivate the soil with agricultural and land reclamation tools and mechanisms to a depth of more than 0.3 meters, i.e. That is, residents of the first floors of the house cannot attach balconies. The plaintiff asks to oblige the defendant to replace the expired underground gas pipeline with a ground one, along the facade of the house .; recover from the defendant the costs of paying state fees and legal fees - 6,200 rubles.

Plaintiff Prokasheva G.A. and its representatives Shulepov A.B., Prokashev V.N. at the hearing supported the arguments and requirements of the claim. In addition, the court was explained that the diagnostics of the gas pipeline did not meet the requirements of the standards, the presented opinion was not trusted, it was falsified, since in fact the state of the gas pipeline in proper condition was not verified by the drilling method, their house was not indicated in the act. They believe that the underground gas pipeline violates their right as owners to use the land and build balconies. It is also believed that since there was no opening of the land plot, they fear corrosion on the gas pipeline, which poses a threat to life. An elevated gas pipeline is easier to control. They are not ready to bear the burden of payment for the replacement of the gas pipeline, because this is the property of Gazprom.

The representative of the defendant JSC "Gazprom Gazoraspredelenie Kirov" by proxy Sannikova E.S. She did not recognize the claims, explained to the court that the underground low-pressure gas pipeline laid in the city of Kirov at the addresses: owned by JSC Gazprom Gazoraspredeleniye Kirov is a distribution gas pipeline for supplying natural gas. Due to the fact that the underground low-pressure gas pipeline, including at the address, was put into operation in 1972, at the request of JSC Gazprom Gazoraspredelenie Kirov (formerly JSC Kirovoblgaz), technical diagnostics of the said underground gas pipeline was carried out for an assessment of the facility's compliance with the industrial safety requirements of KostromaDiagnostika LLC in 2010. Based on the results of the wellbore inspection, no damage to the welded joints of the gas pipeline was found during the examination, the insulating coating of the gas pipeline is good, and there is no corrosion of the surface layer of the pipe metal. According to conclusion No. 17.2010 / 0006-5-3, the low-pressure underground gas pipeline complies with the industrial safety requirements for it and is allowed for further operation. The safe operation period of the gas pipeline has been extended until October 2020, taking into account the results of this opinion. After the expiration of the specified period, it is necessary to conduct an industrial safety examination. Relocation of a low-pressure underground gas pipeline at the address is impractical, because according to conclusion No. 17.2010 / 0006-5-3, this underground low-pressure gas pipeline complies with the industrial safety requirements imposed on it and is approved for further operation. The removal of the gas pipeline to the facade of a residential building will contradict clause 4.7 of SP 42-101-2003, since the laying of gas pipelines on the territory of settlements is predominantly underground. When the gas pipeline is removed to the facade of a residential one, there is no possibility to restrict the access of unauthorized persons to the gas pipeline and to protect an indefinite circle of persons from accidents and the consequences of these accidents. Due to the fact that the underground gas pipeline is a distribution gas pipeline, when the gas pipeline is removed to the facade (a complex of construction and installation works) for some time, some of the residential buildings at the address will be left without gas supply services. JSC Gazprom gazoraspredelenie Kirov bears the burden of maintaining the specified gas pipeline (operation, maintenance, diagnostics, repairs, emergency dispatch support). In the event that a gas pipeline is removed for further operation on the facade of a residential building, these costs must be reimbursed to the owner of the gas pipeline at the expense of the owners who initiate the said removal. The submitted act of technical research in the period from 07/08/2015 to 09/17/2015 confirms the inspection of the entire gas pipeline, including the one passing through the land plot of the disputed house, since the gas pipeline is a single object. Prokasheva G.A. is asked to refuse. in the claim.

The representative of the third party - LLC MC "Paritet" Myshkin D.S. claims Prokasheva G.A. supported.

The court, having heard the parties, having examined the written evidence, came to the following.

DECIDED:

In meeting the claims Prokasheva G.A. to OJSC "Gazprom gazoraspredelenie Kirov" Kirov on the obligation to replace the expired gas pipeline to refuse

The decision can be appealed to Kirovsky regional court through the Oktyabrsky District Court of the city of Kirov within a month from the date of the decision in the final form - October 06, 2015.

Judge S.A. Starodumova

INTERNAL GAS SUPPLY UNITS

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 building codes and regulations for the design of the corresponding buildings.
LAYING OF GAS PIPELINES

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

For the connection of 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. The connection of pipes should be provided, as a rule, for welding. Detachable (threaded and flanged) connections may be provided only at the places of installation of valves, gas appliances, instrumentation, pressure regulators and other equipment.

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 be provided, as a rule, open. It is allowed to provide for hidden laying of gas pipelines (except for LPG gas pipelines and gas pipelines inside residential buildings and public buildings of a non-production nature) in the grooves of the walls, which are closed by easily removable shields with holes for ventilation.

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

At the points of entry and exit of the gas pipeline from the floor, cases should be provided, the ends of which should protrude at least 3 cm above the floor.

6.6. In industrial 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 channels must exclude the possibility of gas spreading under the floor.

Laying gas pipelines in channels is not allowed in places where, according to production conditions, it is possible for substances that cause pipe corrosion to 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 the channels, it is necessary to provide for the device of sealing bridges and the laying of gas pipelines in cases of steel pipes. The ends of the cases should be brought out of the jumpers by 30 cm in both directions.

6.8. Gas pipelines, when laid jointly with other pipelines on common supports, 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 production facilities where gas is not used may be provided for low and medium pressure gas pipelines, provided that no fittings are installed on the gas pipeline and unhindered round-the-clock access to these rooms is provided for personnel serving the gas pipeline.

6.10. It is not allowed to provide for the laying of gas pipelines in rooms classified as explosive and fire hazard categories A and B; in explosive zones of all premises; in basements; in warehouse buildings of explosive and combustible materials; in the premises of substations and switchgears; through ventilation chambers, shafts and channels; elevator shafts; premises for waste bins; chimneys; through rooms where the gas pipeline can be subject to corrosion, as well as in places where the impact of aggressive substances and in places where gas pipelines can 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 should be possible to compensate for temperature deformations.

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

6.13. Disconnecting devices on gas pipelines in industrial premises of industrial and agricultural enterprises, enterprises of consumer services of an industrial nature should include:

at the inlet of the gas pipeline inside the premises;

on branches to each unit;

in front of burners and igniters;

on blowdown pipelines, in the places where they are connected to gas pipelines.

If there is a gas meter or GRU inside the room, located at a distance of no more than 10 m from the gas pipeline inlet, a gate valve or valve in front of the GRU or the meter is considered a disconnecting device at the inlet.

The installation of fittings on gas pipelines laid in channels, in the concrete floor or in the grooves of the walls is not allowed.

6.14. * The need to meter gas consumption and the choice of metering system at gas supply facilities should be determined in accordance with the instructions of the "Rules for the use of gas in the national economy" approved by the Ministry , transport, agricultural and communal enterprises and organizations "approved by the State Committee for Science and Technology, the USSR State Planning Committee, 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 in apartment, individual house) gas metering device - meter.

6.15. Gas metering devices should be placed in hydraulic fracturing or gasification rooms. It is allowed to place devices for metering gas consumption in other rooms not lower than II degree of fire resistance, with exhaust ventilation.

It is allowed to install no more than two gas meters in parallel on one gas pipeline.

6.16. The laying of gas pipelines in residential buildings should be provided for 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 in the absence of the possibility of another laying. Transit gas pipelines within residential premises should not have threaded connections and fittings.

It is not allowed to provide for the laying of risers of gas pipelines in living rooms and sanitary facilities.

6.17. * The installation of disconnecting devices on gas pipelines laid in residential buildings and public buildings (with the exception of public catering establishments and consumer services of an industrial nature) should include:

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 every gas appliance, oven or installation;

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

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

On supplying gas pipelines to gas appliances, in which a disconnecting device in front of the burners is provided in their design (gas stoves, water heaters, furnace burners, etc.), one disconnecting device must be installed.

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

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

6.18. The distance from gas pipelines laid openly and in the floor inside the premises to building structures, technological 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 the gas pipelines should not cross ventilation grilles, window and doorways. In industrial premises, it is allowed to cross skylights filled with glass blocks, as well as to lay a gas pipeline along the frames of non-opening windows.

6.19. The minimum clear distances between the gas pipeline laid along the wall of the building and communication and wire broadcasting facilities should be taken in accordance with the "Safety Rules for Working on Cable Communication Lines and Wire Broadcasting", approved by the USSR Ministry of Communications in the prescribed manner.

6.20. The distances between gas pipelines and utility lines of power supply located inside the premises, at the 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 in the presence of 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 inspection and repair of the gas pipeline and the fittings installed on it.

The distance between the support fasteners 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 the intersection of building structures should be laid in cases. The space between the gas pipeline and the case must be sealed with tarred tow, rubber grommets or other elastic material. The end of the case should protrude at least 3 cm above the floor, and its diameter should be taken from the condition that the annular gap between the gas pipeline and the case should be at least 5 mm for gas pipelines with a nominal diameter of not more than 32 mm and not less than 10 mm for gas pipelines with a larger diameter.

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

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 burner devices and units installed in the shops of industrial enterprises may be provided after the shut-off valve with rubber-fabric hoses. Rubber 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, enterprises of consumer services of an industrial nature, purge pipelines should be provided from the gas pipeline sections farthest from the place of entry, as well as from branches to each unit before the last disconnecting device along the gas path.

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 the air density.

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

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

In some cases (for example, for cutting and welding stations, small industrial furnaces), with a supply gas pipeline with a diameter of not more than 32 mm, it is allowed to provide for the installation of a shut-off device with a blind plug-in 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 purge piping leads should be grounded.
GAS SUPPLY OF 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, with a window with a vent (transom), an exhaust ventilation duct and natural lighting.

At the same time, the internal volume of kitchen premises should be, m3, not less:

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 rooms with a height of at least 2.2 m and a volume of at least 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 vent or a transom in the upper part of the window;

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

in kitchens with sloping ceilings with a height of at least 2 m in the middle part, 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 on the basis of personal property rights, it is allowed to install gas stoves in rooms that meet the requirements of paragraphs. 6.29 or 6.30, but having a height of less than 2.2 m to 2 m inclusive, if these rooms have a volume of at least 1.25 times the standard. At the same time, 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 fulfill these requirements, the installation of gas stoves in such rooms can be allowed in each specific case as agreed by 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 the operating organization of the gas economy, taking into account specific local conditions, including the availability of gas for these purposes. In this case, the premises in which the installation of gas appliances is envisaged 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 the places where the boards 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 board 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, flow-through or capacitive gas water heaters should be provided, and for heating - capacitive gas water heaters, small-sized heating boilers or other heating devices designed to operate on gas fuel.

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

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

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

It is not allowed to provide for the installation of more than two storage water heaters or two small-sized heating boilers or two other heating devices in one room.

6.36. The chimney arrangement 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 allowed 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. The installation of these appliances in bathrooms is not permitted. The question of the need to rearrange gas water heaters from the bathrooms, in which they were located in accordance with previously valid standards, to kitchens or other non-residential premises of a residential building during the reconstruction of a house or a gas supply system should be decided in each specific case by the design organization in agreement with the local operating organizations gas facilities.

In existing residential buildings, it is allowed to provide for the installation of heating gas appliances and heating devices in the 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).

In the absence of walls made of non-combustible materials in the room, it is allowed to provide for the installation instantaneous water heater on plastered walls, as well as on walls lined with non-combustible or hardly combustible materials at a distance of at least 3 cm from the wall.

The surface of non-combustible 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 gas storage water heaters should be provided against 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 heating devices near the walls protected in accordance with the instructions in clause 6.38, at a distance of at least 10 cm from the wall.

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

6.41. * When installing a gas stove and an 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 storage 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 more than the volume provided for in clause 6.29.

6.42. * A room intended for placing a gas water heater, as well as a heating boiler or heating device, the removal of combustion products from which is provided in 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 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 grate or a gap between the door and the floor with a free cross-section of at least 0.02 m2 should be provided in the lower part of the door or wall opening into the adjacent room.

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

Note. The requirements of this clause do not apply to residential buildings owned by citizens on the basis of personal property rights, if the basements of these houses have natural lighting, and they are supplied with gas from natural gas.

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

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

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

6.46. The furnaces of gasified furnaces should be provided, as a rule, from the side of the corridor or other non-residential (unofficial) premises.

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

The rooms into which the fireboxes of gasified heating and heating-cooking stoves go out must have an exhaust ventilation duct or a window with a vent, or a door leading to a non-residential premises or a vestibule. There must be a passage in front of the oven with a width of at least 1 m.

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

The room in which it is planned to install a gas fireplace or air heater 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 the conditions for placing household gas appliances not specified in this section should be determined taking into account the purpose of the devices, their thermal load, the need to remove combustion products and other parameters specified in this section.

CONDITION 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 device, unit or furnace 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, not closer than 0.75 m from one another, or at the same level with a device in the chimney cut to a height of at least 0.75 m.

2. In existing buildings, in the absence of chimneys, it is allowed to provide for the device of side chimneys.

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

The connection of the flue gas pipe of the gas appliance to the chimney turns of the heating stove is not allowed.

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

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

It is allowed to provide connecting flue pipes common to several units.

The introduction of combustion products into a common chimney for several devices should be provided at different levels or at the same level with the diffuser according to clause 1.

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

6. * Chimneys must be vertical, without ledges. The slope of the chimneys from the vertical up to 30 ° with a deviation to the side up to 1 m is allowed, 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. For the removal of combustion products from restaurant stoves and other non-household gas appliances, it is allowed to provide for 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-fighting device for combustible floor 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 the sections of the connecting pipe in new buildings should be taken no more than 3 m, in existing buildings - no more than 6 m.

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

On chimneys, 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 place where the chimney is connected from the device to the chimneys, a “pocket” device with a hatch for cleaning should be provided.

Flue pipes laid through unheated rooms should be covered with thermal insulation, if necessary.

9. The distance from the connecting chimney to the ceiling or wall made of non-combustible materials should be at least 5 cm, to plastered wooden ceilings and walls - at least 25 cm. It is allowed to reduce the specified distance from 25 to 10 cm provided that the wooden plastered walls or ceiling are upholstered. roofing steel on an asbestos sheet with a thickness of 3 mm. The upholstery should protrude 15 cm from each side of the chimney.

10. When connecting one device to the chimney, as well as devices with draft stabilizers, gates on the chimneys are not provided.

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

11. In dampers installed on chimneys from boilers, holes with a diameter of at least 50 mm must be provided.

12. Chimneys from gas appliances in buildings should be removed:

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

not lower than a straight line drawn from the ridge down at an angle of 10 ° to the horizon, 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, consumer services is allowed to be provided through steel chimneys.
APPENDIX 7 *
Mandatory
SELECTION OF STEEL PIPES FOR GAS SUPPLY SYSTEMS

1. Steel pipes for gas supply systems with a pressure of 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 earth's surface, should be taken:

according to table 1 * - for external overhead gas pipelines laid in areas with an estimated outside air temperature of at least minus 40 ° С, as well as for underground and internal gas pipelines that are not cooled to temperatures below minus 40 ° С;

according to table 2 - for aboveground gas pipelines laid in areas with a design temperature of the outside air below minus 40 ° С and underground gas pipelines that can be cooled to temperatures below minus 40 ° С.

2. For gas supply systems, 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 should be accepted.

3. For gas pipelines of the liquid phase of LPG, as a rule, seamless pipes should 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% non-destructive testing of the welded seam, and pipes with a diameter of 50 mm or more must also undergo a tensile test of the welded seam.

Table 1*

Steel pipes for the construction of external overground gas pipelines laid in areas with a design outside air temperature of at least minus 40 ° С, as well as underground and internal gas pipelines that are not cooled to temperatures below minus 40 ° С

4. * Pipes in accordance with GOST 3262-75 are allowed to be used for the construction of external and internal low pressure gas pipelines. Pipes in accordance with GOST 3262-75 with a nominal diameter up to 32 mm incl. it is allowed to use for the construction of impulse gas pipelines with a pressure of up to 1.2 MPa (12 kgf / cm2) inclusive. In this case, the bent sections of impulse gas pipelines must have a bend radius of at least 2De and the pipe wall temperature during operation must not be lower than 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 ° С incl. At the same time, do not use these pipes for performing elastic bending (turning) of the gas pipeline in vertical and horizontal planes with a radius of less than 1500 pipe diameters, 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 annex, but made of semi-calm and boiling steel, is regulated by paragraphs 11.7, 11.8. 7. Pipes in accordance with GOST 8731 - 87, made from ingots, should not be used without 100% non-destructive testing of pipe metal. When ordering pipes according to GOST 8731-87, indicate that pipes according to this standard, made from ingots, cannot be supplied without 100% non-destructive testing.

Gas pipeline laying along the walls of buildings

Gasification is a complex process from a technological point of view, which should be carried out exclusively by professionals. The most important stage in laying a gas pipeline is its design taking into account the smallest details and a preliminary assessment of the specifics of the building. Do not forget about the equipment, without which it is impossible to mount a gas pipeline at a height (for example, rental of construction cradles). Within the framework of this stage, it is determined:
The location of the pipeline,
· Type of equipment,
· Locations of chimneys and ventilation openings.
Illiterate technical solutions can lead to serious problems regarding the safety of building residents and lead to insufficient functioning of the system. It is necessary to carry out work at a height using special equipment; in this case, you can use the service of renting construction cradles.

Gas pipelines along the walls: specifics of installation

This type of gasification refers to land-based. Its advantages are: unimpeded access to the system for service personnel at any time; they are less susceptible to deformation than underground; service can be performed without shutting down consumer access points.
Only low and medium pressure systems can be mounted on the outer walls of residential buildings and public facilities. At the same time, requirements are also imposed on the structure: the degree of fire resistance of the structure must be at least IV degree, the supports used in its construction are non-combustible and free-standing.
Lay low-pressure gas pipelines along the walls of residential buildings, the boundary diameter of the pipes is 50 mm.
For the installation procedure, you will need to rent front lifts in the absence of proper equipment. It is not recommended to install flanged or threaded connections under window openings, as well as at the bottom of balconies. It is necessary to protect the pipes from mechanical damage and unfavorable environmental conditions, cover them with heat-insulating material. The pipe must be installed at a slope (not less than 0.003); at the lowest point, structures must be installed to receive the accumulated condensate.
The pipes are installed using a welding machine, after fixing along the wall (observing the distance between its surface and the gas pipeline), the entire system is tested for the absence of gaps and holes. This reduces the risk of gas leakage, ensuring complete safety for users. The lease of front elevators, ordered from any reliable company, will greatly facilitate the process of installing the gas pipeline for specialists.

5.1.1 The location of external gas pipelines in relation to buildings, structures and parallel neighboring utilities should be carried out in accordance with the requirements of SNiP 2.07.01, and on the territory of industrial enterprises - SNiP II-89.

When laying underground gas pipelines with a pressure of up to 0.6 MPa in cramped conditions (when it is not possible to fulfill the distances regulated by regulatory documents), on certain sections of the route, between buildings and gifts of buildings, as well as gas pipelines with a pressure of over 0.6 MPa when they are brought together with detached ancillary buildings (buildings without the constant presence of people), it is allowed to reduce the distances specified in SNiP 2.07.01 and SNiP II-89 by up to 50%. At the same time, in the areas of convergence and at a distance of at least 5 m in each direction from these areas, the following should be applied:

seamless or electrically welded steel pipes laid in a protective case, with 100% physical control of factory welded joints;

polyethylene pipes laid in a protective case, without welded joints or connected by parts with embedded heaters (ZN), or butt-welded with 100% control of joints by physical methods.

When laying gas pipelines at distances corresponding to SNiP 2.07.01, but less than 50 m from railways common use in the area of ​​approach and 5 m in each direction, the depth of laying must be at least 2.0 m. Butt welded joints must pass 100% control by physical methods.

In this case, the wall thickness of steel pipes should be 2-3 mm more than the calculated one, and polyethylene pipes should have a safety factor of at least 2.8.

5.1.2 Laying of gas pipelines should be provided for underground and surface.

In justified cases, above-ground laying of gas pipelines is allowed along the walls of buildings inside residential yards and quarters, as well as on certain sections of the route, including at sections of crossings through artificial and natural barriers when crossing underground utilities.

Aboveground and aboveground gas pipelines with embankment can be laid in rocky, permafrost soils, in swampy areas and under other difficult soil conditions. The material and dimensions of the embankment should be taken on the basis of the heat engineering calculation, as well as ensuring the stability of the gas pipeline and the embankment.

5.1.3 Laying gas pipelines in tunnels, collectors and channels is not allowed. The exception is the laying of steel gas pipelines with a pressure of up to 0.6 MPa in accordance with the requirements of SNiP II-89 on the territory of industrial enterprises, as well as in channels in permafrost soils under roads and railways.

5.1.4 Pipe connections should be permanent. Connections of steel pipes with polyethylene and

in the places of installation of fittings, equipment and instrumentation (instrumentation). Detachable joints of polyethylene pipes with steel pipes in the ground can only be provided if a case with a control tube is installed.

5.1.5 Gas pipelines at the points of entry and exit from the ground, as well as gas pipelines inlets to buildings should be enclosed in a case. The space between the wall and the case should be filled up to the full thickness of the structure to be crossed. The ends of the case should be sealed with elastic material.

5.1.6 Entries of gas pipelines into buildings should be provided directly to the room where the gas-using equipment is installed, or to an adjacent room connected by an open opening.

Gas pipelines are not allowed to enter the premises of the basement and basement floors of buildings, except for natural gas pipelines in single-family and blocked houses.

5.1.7 Disconnecting devices on gas pipelines should include:

in front of detached or blocked buildings;

to disconnect risers of residential buildings above five floors;

in front of outdoor gas-using equipment;

in front of gas control points, except for hydraulic fracturing of enterprises, on the branch of the gas pipeline to which there is a disconnecting device at a distance of less than 100 m from the hydraulic fracturing;

at the exit from gas control points looped by gas pipelines;

on branches from gas pipelines to settlements, individual microdistricts, quarters, groups of residential buildings, and with more than 400 apartments to a separate house, as well as on branches to production consumers and boiler houses;

when crossing water barriers with two or more lines, as well as one line with a water barrier width with a low water level of 75 m or more;

at the intersection of railways of the general network and highways of categories I – II, if the disconnecting device that ensures the cessation of gas supply at the crossing section is located at a distance of more than 1000 m from the roads.

5.1.8 Disconnecting devices on overground gas pipelines laid along the walls of buildings and on supports should be placed at a distance (within a radius) from door and opening window openings at least:

for low pressure gas pipelines - 0.5 m;

for gas pipelines of medium pressure - 1 m;

for high pressure gas pipelines of the II category - 3 m;

for high-pressure gas pipelines of category I - 5 m.

Installation of disconnecting devices on the sections of transit laying of gas pipelines along the walls of buildings is not allowed.

5.2.1 Laying of gas pipelines should be carried out at a depth of at least 0.8 m to the top of the gas pipeline or case. In places where the movement of vehicles and agricultural machinery is not foreseen, the depth of laying steel gas pipelines can be at least 0.6 m.

5.2.2 The vertical distance (in the light) between the gas pipeline (case) and underground utilities and structures at their intersections should be taken taking into account the requirements of the relevant regulatory documents, but not less than 0.2 m.

5.2.3 At the intersection of gas pipelines with underground communication collectors and channels for various purposes, as well as at the places where gas pipelines pass through the walls of gas wells, the gas pipeline should be laid in a case.

The ends of the case should be brought out at a distance of at least 2 m in both directions from the outer walls of the structures and utilities to be crossed, when crossing the walls of gas wells - at a distance of at least 2 cm. The ends of the case should be sealed with waterproofing material.

At one end of the case, at the upper point of the slope (except for the intersection of the walls of the wells), a control tube should be provided that goes under the protective device.

In the annular space of the case and the gas pipeline, it is allowed to lay a service cable (communication, telemechanics and electrical protection) with a voltage of up to 60 V, intended for servicing gas distribution systems.

5.2.4 Polyethylene pipes used for the construction of gas pipelines must have a safety factor of at least 2.5 in accordance with GOST R 50838.

Laying of gas pipelines from polyethylene pipes is not allowed:

on the territory of settlements at a pressure of over 0.3 MPa;

outside the territory of settlements at a pressure of over 0.6 MPa;

for transportation of gases containing aromatic and chlorinated hydrocarbons, as well as the liquid phase of LPG;

at a gas pipeline wall temperature under operating conditions below minus 15 ° C.

When using pipes with a safety factor of at least 2.8, it is allowed to lay polyethylene gas pipelines with a pressure of more than 0.3 to 0.6 MPa in the territories of settlements with mainly one-two-story and cottage residential buildings. On the territory of small rural settlements, it is allowed to lay polyethylene gas pipelines with a pressure of up to 0.6 MPa with a safety factor of at least 2.5. In this case, the laying depth must be at least 0.8 m to the top of the pipe.

5.3.1 Aboveground gas pipelines, depending on pressure, should be laid on supports made of non-combustible materials or along structures of buildings and structures in accordance with Table 3

Table 3

5.3.2 Transit laying of gas pipelines of all pressures along the walls and over the roofs of buildings of children's institutions, hospitals, schools, sanatoriums, public, administrative and residential buildings with a mass presence of people is not allowed.

It is prohibited to lay gas pipelines of all pressures along the walls, above and below rooms of categories A and B, determined by fire safety standards, with the exception of hydraulic fracturing buildings.

In justified cases, transit laying of gas pipelines not higher than average pressure with a diameter of up to 100 mm is allowed along the walls of one residential building not lower than III degree of fire resistance of class CO and at a distance of at least 0.2 m from the roof.

5.3.3 High-pressure gas pipelines should be laid along blank walls and sections of walls or at least 0.5 m above window and door openings of the upper floors of industrial buildings and administrative and household buildings interlocked with them. The distance from the gas pipeline to the roof of the building must be at least 0.2 m.

Low and medium pressure gas pipelines can also be laid along the bindings or imposts of non-opening windows and cross the window openings of industrial buildings and boiler rooms filled with glass blocks.

5.3.4 The height of the laying of aboveground gas pipelines should be taken in accordance with the requirements of SNiP 11-89.

5.3.5 On pedestrian and road bridges built of non-combustible materials, it is allowed to lay gas pipelines with a pressure of up to 0.6 MPa from seamless or electric-welded pipes that have passed 100% inspection of factory welded joints by physical methods. The laying of gas pipelines on pedestrian and road bridges built of combustible materials is not allowed.

5.4.1 Underwater and surface gas pipelines in places where they cross water barriers should be located at a distance from bridges horizontally in accordance with Table 4.

5.4.2 Gas pipelines at underwater crossings should be laid with deepening into the bottom of the crossed water barriers. If necessary, according to the results of calculations for ascent, it is necessary to ballast the pipeline. The elevation of the top of the gas pipeline (ballast, lining) should be at least 0.5 m, and at crossings through navigable and floatable rivers - 1.0 m lower than the predicted bottom profile for a period of 25 years. When performing works using the directional drilling method - not less than 2.0 m below the predicted bottom profile.

5.4.3 On underwater crossings the following should be applied:

steel pipes with a wall thickness of 2 mm more than the calculated one, but not less than 5 mm;

polyethylene pipes having a standard dimensional ratio of the outer diameter of the pipe to the wall thickness (SDR) no more than 11 (according to GOST R 50838) with a safety factor of at least 2.5 for transitions up to 25 m wide (at the level of maximum water rise) and at least 2.8 otherwise.

When laying a gas pipeline with a pressure of up to 0.6 MPa by directional drilling, in all cases, polyethylene pipes with a safety factor of at least 2.5 can be used.

5.4.4 The height of the laying of the above-water passage of the gas pipeline from the design level of water rise or ice drift according to SNiP 2.01.14 (high water horizon - GVV or ice drift - GVL) to the bottom of the pipe or superstructure should be taken:

at the intersection of ravines and beams - not lower

Table 4

0.5 m above the hot water supply with 5% coverage;

when crossing non-navigable and non-floating rivers - at least 0.2 m above the GWV and GVL with a 2% supply, and if there is a grubber on the rivers - taking it into account, but not less than 1 m above the GWV with a 1% supply;

when crossing navigable and floating rivers - not less than the values ​​established by the design standards for bridge crossings on navigable rivers.

Stop valves should be placed at a distance of at least 10 m from the boundaries of the transition. The places where the gas pipeline crosses the high water horizon with 10% coverage are taken as the border of the crossing.

5.5.1 Distances horizontally from the intersection of underground gas pipelines of tram and railway tracks and highways must be at least:

to bridges and tunnels on public railways, tramways, highways of categories I – III, as well as to pedestrian bridges, tunnels through them - 30 m, and for non-public railways, roads IV – V categories and pipes - 15 m ;

to the turnout zone (the beginning of the wits, the tail of the crosses, the points of connection to the rails of the suction cables and other crossings of the track) - 4 m for tram tracks and 20 m for the railways;

to the overhead supports - 3m.

It is allowed to reduce the indicated distances in agreement with the organizations in charge of the crossed structures.

5.5.2 Underground gas pipelines of all pressures at intersections with railway and tram tracks, highways of categories I – IV, as well as main streets of city-wide significance should be laid in cases. In other cases, the question of the need for the device of cases is decided by the design organization.

Cases must meet the conditions of strength and durability. A test tube should be provided at one end of the case, which extends under the protective device.

5.5.3 The ends of the cases when crossing the gas pipelines of public railways should be removed at a distance from them not less than the established SNiP 32-01. When laying inter-settlement gas pipelines in cramped conditions and gas pipelines on the territory of settlements, it is allowed to reduce this distance to 10 m, provided that an exhaust plug with a sampling device is installed at one end of the case, brought out at a distance of at least 50 m from the edge of the roadbed (the axis of the outer rail is at zero marks).

In other cases, the ends of the cases should be spaced apart:

not less than 2 m from the end rail of the tramway and 750 mm gauge railways, as well as from the edge of the carriageway of streets;

not less than 3 m from the edge of the drainage structure of roads (ditch, ditch, reserve) and from the extreme rail of non-public railways, but not less than 2 m from the foot of the embankments.

5.5.4 When gas pipelines cross public railway lines of 1520 mm gauge, the gas pipeline laying depth must comply with SNiP 32-01.

In other cases, the depth of laying the gas pipeline from the foot of the rail or the top of the road surface, and in the presence of an embankment, from its bottom to the top of the case, must meet safety requirements, but not less than:

when performing work by open-cut method –1.0 m;

when performing works by punching shear or directional drilling and shield penetration –1.5 m;

when performing work by the puncture method - 2.5m.

5.5.5 The wall thickness of the pipes of a steel gas pipeline when it crosses public railways should be 2–3 mm more than the calculated one, but not less than 5 mm at distances of 50 m in each direction from the edge of the roadbed (the axes of the outer rail at zero marks) ...

For polyethylene gas pipelines in these sections and at the intersections of categories I – III highways, polyethylene pipes of no more than SDR 11 with a safety factor of at least 2.8 should be used.

5.6.1 Gas supply to cities with a population of over 1 million people. with seismicity of the terrain more than 6 points, as well as cities with a population of more than 100 thousand people. if the seismicity of the area is more than 7 points, it should be provided from two or more sources - main gas distribution stations with their placement on opposite sides of the city. At the same time, gas pipelines of high and medium pressure should be designed as looped-back ones with their division into sections by disconnecting devices.

5.6.2 Crossings of gas pipelines through rivers, ravines and railway tracks in excavations, laid in areas with seismicity more than 7 points, should be provided for aboveground. The structures of the supports should provide the ability to move gas pipelines that occur during an earthquake.

5.6.3 During the construction of underground gas pipelines in seismic areas, in undermined and karst areas, at the intersection with other underground utilities, at the bends of gas pipelines with a bend radius of less than 5 diameters, at the branching points of the network, the transition from underground to aboveground, the location of permanent connections "Polyethylene-steel", as well as within settlements on linear sections after 50 m, control tubes should be installed.

5.6.4 The depth of laying gas pipelines in soils of an unequal degree of heaving, as well as in bulk soils, should be taken to the top of the pipe - not less than 0.9 of the standard freezing depth, but not less than 1.0 m.

With uniform heaving pounds, the depth of the gas pipeline to the top of the pipe should be:

not less than 0.7 standard freezing depth, but not less than 0.9 m for medium porous soils;

not less than 0.8 of the standard freezing depth, but not less than 1.0 m for strongly and excessively heaving soils.

5.6.5 For LPG tank installations with underground reservoirs in heaving (except for slightly heaving), medium and strongly swelling soils, an above-ground laying of liquid and vapor gas pipelines connecting the reservoirs should be provided.

5.6.6 When the seismicity of the area is more than 7 points, in undermined and karst areas, in areas of permafrost for polyethylene gas pipelines, pipes with a safety factor of at least 2.8 should be used. Butt welded joints must be 100% tested by physical methods.

5.7.1 For restoration (reconstruction) of worn-out underground steel gas pipelines outside and on the territory of urban and rural settlements, the following should be used:

at a pressure of up to 0.3 MPa inclusively, broaching polyethylene pipes in a gas pipeline with a safety factor of at least 2.5 without welded joints or connected using parts with ZN, or butt-welded using welding equipment of a high degree of automation;

at a pressure of 0.3 to 0.6 MPa, inclusive, pulling polyethylene pipes in a gas pipeline without welded joints or connected using parts with ZN or butt welding using welding equipment of a high degree of automation with a safety factor for gas pipelines in the territory of settlements of at least 2, 8, and outside settlements - not less than 2.5. The space between the polyethylene pipe and the steel worn out gas pipeline (frame) along the entire length must be filled with a sealing (sealing) material (cement-sand mortar, foam material);

at a pressure of up to 1.2 MPa, lining (using the Phoenix technology) of the cleaned inner surface of gas pipelines with a synthetic fabric hose on a special two-component glue, subject to confirmation in the established order of their suitability for these purposes at the specified pressure or in accordance with the standards (technical conditions) ; the scope of which applies to this pressure.

5.7.2 The restoration of worn-out steel gas pipelines is carried out without changing the pressure, with an increase or decrease in pressure in comparison with the existing gas pipeline.

At the same time, it is allowed to save:

intersections of rehabilitated areas with underground utilities without installing additional cases;

the depth of the restored gas pipelines;

the distance from the restored gas pipeline to buildings, structures and utilities according to its actual location, if the pressure of the restored gas pipeline does not change or when the pressure of the restored gas pipeline rises to 0.3 MPa.

The restoration of worn-out steel gas pipelines with an increase in pressure to high is allowed if the distances to buildings, structures and utilities meet the requirements for a high-pressure gas pipeline.

5.7.3 The ratio of the sizes of polyethylene and steel pipes during reconstruction by the pulling method should be selected based on the possibility of free passage of polyethylene pipes and parts inside steel pipes and ensuring the integrity of polyethylene pipes. The ends of the reconstructed sections between the polyethylene and steel pipes must be sealed.

Aboveground gas pipelines should be laid on free-standing supports, stacks and columns made of non-combustible materials or along the walls of buildings. In this case, laying is allowed:

On freestanding supports, columns, ladders and stacks - gas pipelines of all pressures;

On the walls of industrial buildings with rooms related to fire hazard categories G and D - gas pipelines with a pressure of up to 0.6 MPa;

On the walls of public and residential buildings of at least 3 degrees of fire resistance - gas pipelines with a pressure of up to 0.3 MPa;

On the walls of public buildings and residential buildings of 4-5 degrees of fire resistance - low pressure gas pipelines with a nominal pipe diameter of no more than 50 mm. The height of laying gas pipelines along the walls of residential and public buildings should be taken in agreement with the operating organization.

It is prohibited to lay transit gas pipelines:

On the walls of buildings of children's institutions, hospitals, sanatoriums, cultural, entertainment, leisure and religious institutions - gas pipelines of all pressures;

On the walls of residential buildings - medium and high pressure gas pipelines.

The connection of underground steel gas pipelines-inputs with the riser of the above-ground (basement) input must be welded using bent or steeply bent branches. Welded butt joints in the sections of underground gas pipelines-inputs must be checked by non-destructive testing methods.

High-pressure gas pipelines up to 0.6 MPa are allowed to be laid along the walls, above windows and doorways of one-story buildings and above the windows of the upper floors of industrial buildings with rooms classified as fire hazard categories D and D, as well as buildings of detached boiler rooms.

It is not allowed to provide detachable connections and shut-off valves on gas pipelines under balconies and under window openings of residential and public buildings.

In a free area outside the passage of vehicles and the passage of people, it is allowed to lay gas pipelines on low supports at a height of at least 0.5 m, provided that one or more pipes are laid on the support. Gas pipelines in places where they exit from the ground should be enclosed in cases, the above-ground part of which should be at least 0.5 m. The end of the above-ground parts of the cases must be sealed with bitumen to prevent atmospheric precipitation from entering the inter-tube space.

Distance to buildings and structures see table

In places where people pass, the height of the gas pipeline on the supports is 2.2 m.

When laying the gas pipeline on supports closer than 2 m to the edge of the carriageway, a protective fence must be provided. The minimum distance of the protective gas pipeline to buildings should be at least 2 m. Gas pipelines are fastened to the supports using clamps.

Allowable spans between supports:

Pipe d- 20mm - 3 m

25mm - 3.5m

The gas pipeline is laid along the walls using brackets according to the 5.905-8 series (Fastening the gas pipeline along the walls of the building). The distance between gas lines and walls should provide easy access for inspection and repair.

To combat corrosion, metal structures and pipes are painted twice with a preliminary application of a primer.

Insulating flanges. Purpose and place of installation.

Insulating flange connection (IFS). Protection of gas pipelines with the help of IFS and inserts consists in the fact that the gas pipeline is divided into separate sections, due to which the conductivity of the pipe decreases, and at the same time the current flowing through the gas pipeline decreases and the solution of the issue of their protection is simplified.

Installation of EIF at the inputs provides for the impossibility of electrical contact between the house and the gas pipeline. Installation of EIF on gas pipelines - inputs into the house not higher than 2.2 m (usually 1.6-1.8 m from the ground for ease of maintenance).

Flange connections when installing valves, compensators must be bridged with permanent jumpers.

Placement of disconnecting devices on the gas pipeline.

Disconnecting devices on gas pipelines should include:

At the inputs, residential, public, industrial buildings, in front of external gas-consuming installations (mobile boilers, bitumen-cooking boilers, ovens for drying sand and burning building materials, etc.)

At the inputs to the hydraulic fracturing, at the outputs from the hydraulic fracturing with looped gas pipelines in systems with two or more hydraulic fracturing;

On the branches of inter-settlement gas pipelines to settlements or enterprises;

On branches from gas distribution pipelines to individual microdistricts, neighborhoods and individual groups of residential buildings;

For sectioning distribution pipelines of medium and high pressure for the possibility of performing emergency and repair work;

When gas pipelines cross water barriers, as well as one line with a water barrier width with a low-water horizon of 75 m or more;

When gas pipelines cross the railways of the general network and highways of categories 1 and 2, disconnecting devices should be placed:

In front of the territories of industrial, municipal and other enterprises.

Disconnecting devices on external gas pipelines should be placed in wells, ground fireproof cabinets or fences, as well as on the walls of buildings. A well-free underground installation of disconnecting devices connected by welding, intended for a well-free installation and requiring no maintenance, is allowed.

Disconnecting devices intended for installation on the walls of buildings should be placed at distances from doorways and opening window gaps, at least, m:

For low pressure gas pipelines - 0.5 m;

For gas pipelines of medium pressure horizontally - 1.0 m;

For high pressure gas pipelines up to 0.6 MPa horizontally -3.0 m.

The distance from the disconnecting devices on the gas pipeline placed on the walls of the buildings to the intake ventilation devices must be at least 5 m horizontally. When the disconnecting devices are located at a height of more than 2.2 m

platforms made of non-combustible materials with ladders should be provided.

Purpose, device of shut-off and control valves?

Industrial pipeline fittings are:

1.locking

2. regulating

3. safety

4. control

Shut-off valves are designed to turn on and off individual sections of pipelines during operation. It includes taps, valves, gate valves.

Control valves are designed to change the pressure or temperature, or the flow rate of the transported medium.

Safety valves are designed to protect pipelines, gas equipment, containers from unnecessarily

high pressure, as well as to maintain the required pressure in the pipeline.

The shut-off valves must be airtight with respect to the external environment. Gates, taps, gate valves and rotary gates provided for gas supply systems as shut-off valves (shut-off devices) must be designed for hydrocarbon gases. The tightness of the gates must correspond to class 1 in accordance with GOST 9544.

Valves and butterfly valves shall have swing stops and open-close position indicators.

The valves are made of gray cast iron, ductile iron, carbon steel, copper-based alloys.

Shut-off valves in accordance with GOST 4666 must be marked on the body and have a distinctive color. Marking must contain the manufacturer's trademark, nominal or working pressure, nominal bore and flow direction indicator, if necessary.

KPO on underground gas pipelines. Terms of inspection of gas pipelines. Paperwork.

Underground gas pipelines (made of metal and polyethylene pipes) in operation must undergo technical inspection, incl. and complex instrumental examination. KPO, with the help of devices according to specially developed instructions, and, if necessary, drilling is also carried out. During technical inspection

gas pipelines, the actual location of gas pipelines, the state of structures and equipment on them, tightness, the state of the protective coating and electrochemical protection must be determined.

When performing KPO, the following are checked:

location and, if necessary, the depth of the gas pipeline;

tightness of the gas pipeline;

continuity and condition of the protective coating.

Technical inspection of underground steel gas pipelines is carried out:

with a service life of up to 25 years - at least once every 5 years. The first one a year after commissioning;

when operating over 25 years and before the expiration of the amortization period of operation - at least once every 3 years;

when included in the plan overhaul or replacement, as well as with a protective coating below the "very reinforced" type - at least once a year.

Extraordinary KPO gas pipelines must be carried out:

In the event that the service life exceeds for steel gas pipelines - 40 years, for semi-finished ones - 50 years;

When detecting leaks or ruptures of welded joints, through corrosion damage;

When the potential "gas pipeline-ground" decreases to values ​​below the minimum permissible, subject to a break in the operation of electrical protection installations for more than 1 month - in the zones of influence of stray currents and more than 6 months - in other cases provided for by DSTU B V.2.5-29: 2006 " Engineering equipment for houses and structures. External networks and facilities. Gas supply systems. Underground steel gas pipelines. General requirements for corrosion protection ".

On gas pipelines with a protective coating below the "very reinforced" type, in addition to KPO, control pitting should be carried out to determine the condition of the pipes and the quality of welded joints. Technical inspection of the condition of polyethylene gas pipelines is carried out within the time frame established for steel gas pipelines.

At KPO, a worksheet is drawn up 2 copies, one is given to the master of the network section.

Pitting on a gas pipeline. Purpose of pitting. The order of the work. Registration of documentation.

Inspection of underground steel gas pipelines in order to determine the state of the protective coating, where the use of devices is hampered by industrial interference, is carried out by opening control pits on the gas pipelines with a length of at least 1.5 m every 500 m.

The places of opening the control pits, their number in the zones of industrial interference are determined by the gas company or the company operating the gas facilities on its own.

For visual inspection, areas are selected that are subject to the greatest corrosion hazard, the intersection of gas pipelines with other underground utilities, condensate collectors. At the same time, at least one pit should be opened for every kilometer of gas distribution pipelines and for every 200 m - for a yard or intra-block gas pipeline, but at least one hole for a driveway, yard or block.

Checking the tightness and detecting places of gas leaks from underground gas pipelines during the period of freezing of the soil, as well as in areas located under improved road surfaces, should be carried out by drilling wells (or pinning), followed by taking air samples from them.

On gas distribution pipelines and inlets, wells are drilled at the joints. In the absence of the location of the joints, the wells should be drilled every 2 m.

The depth of their drilling in winter should be no less than the depth of freezing of the soil, in the warm season - correspond to the depth of pipe laying. Wells are laid at a distance of at least 0.5 m from the gas pipeline wall.

When using highly sensitive gas detectors, it is allowed to reduce the depth of the wells and place them along the axis of the gas pipeline, provided that the distance between the top of the pipe and the bottom of the well is at least 40 cm.

The use of open fire to determine the presence of gas in wells is not allowed.

Pit inspection of polyethylene gas pipelines is carried out only in places where steel inserts are installed.

At least 1 insert is checked for 1 km of gas distribution pipelines and for each quarterly distribution. To be able to inspect the joints of the joints of a polyethylene gas pipeline with a steel insert, the length of the pit should be 1.5-2 m. The opening of the pits is performed using mechanisms or manually. Insulation and metal inspection of steel inserts must be carried out at least once every 5 years.

Based on the results of a technical inspection of steel and polyethylene gas pipelines, a protocol should be drawn up, in which, taking into account the identified defects and an assessment of the technical condition, an opinion should be given on the possibility of further operation of the gas pipeline, the need for the timing of its repair and replacement. Information about the work performed and the results of the survey is entered into the passport of the gas pipeline.