Ball gas valve and its features. Master class: how to make an audit of Soviet gas taps Installing gas taps

Gas / Gasification and gas supply

We publish a couple of answers to topical issues on the distribution of gas pipes in the apartment. What distance should be from gas pipe to the sockets? And at what height from the floor can the gas tap be placed? Mosgaz's answers.

At what height should the gas tap be installed and what should be the distance from the gas pipe to the outlet?

Good day! Please tell me what is the minimum distance from the gas pipe to the gas hob and to the sockets? And also, is there standard height the location of the tap-off from the floor level? Thank you in advance!

Answer: Dear Irina Sergeevna! On your appeal dated 10/22/2014 OJSC "MOSGAZ" informs the following.

According to paragraphs. 3.7 and 3.9 of the Moscow standard for the operation of the housing stock "Gas pipelines and gas equipment of residential buildings" (ZhNM-2004/03), approved and enacted by the Moscow Government decree of 02.11.2004 No. 758-PP:

- the disconnecting device is installed at the level of the connecting nipple of the gas stove (approximately 80 cm from the floor, depending on the brand of equipment) at a distance of 20 cm from the device; with top wiring, the shut-off valve is installed at the lowering to the slab at a height of 1.5-1.6 m from the floor;

- gas pipelines inside the house are laid openly. It is not allowed to close the gas pipeline with a false wall. At the intersections of an electric wire and a cable with a gas pipeline, the distance between them in the light should be at least 100 mm, with parallel laying - at least 400 mm.

Best regards, Koloskov Yury Evgenievich, First Deputy general director OJSC "MOSGAZ"

The kitchen is often the main place in the home where people spend most of their time - cooking, eating, meeting and socializing. That is why, when repairing it, you want to get the perfect result, create coziness and comfort.

Therefore, it is important at this stage to think over the entire ergonomics of the space. If you do enough sockets are not a problem, then the communications available in the kitchen in the form various pipes create a number of problems during repairs.

If taped or sewer pipes can be moved, removed under a screed or in a wall, or hidden behind a curtain in the case of a heating pipe, then in most cases this will not work with a gas pipe.

According to the existing standards, it is strictly forbidden to close the gas pipe "dull". Free access to it must be ensured, otherwise during the check you will be fined and forced to break the structures covering the pipe.

It is impossible to shorten the gas pipe in the kitchen on your own, you cannot move it to another place - the approval and permission of gas services is necessary.

And in some cases, it is simply not possible to do this, for example, if the pipe runs almost throughout the entire kitchen. But even if everyone required permissions on the changes received, it will still not work to completely cut the gas pipe in the kitchen.

This begs the question of what to do in this case, how to proceed so that the pipe does not spoil the appearance of the kitchen. Do not despair. There are a lot of options on how to hide a gas pipe in the kitchen. Moreover, most of them will not require high costs... Let's consider the main ones.

The easiest and cheapest way to hide a pipe in an existing interior is decorating. You can make it yourself, or use the services of a decorator. Used for decoration available materials and the result will impress you.

Note! Green kitchen: ideas, tips, design photos

How to decorate a gas pipe in the kitchen?

With paint

One of the simplest and inexpensive ways is the painting of the gas pipe in the color of the walls, or vice versa, in a bright contrasting color.

For a perfect result, use paints intended for painting pipes, which, in addition to the aesthetic component, protect metal pipes from corrosion.

Using decoupage

Decorate the gas pipe by transferring a pattern or ornament from a special film, or ordinary napkins to it, cutting out the fragment you like (see the photo of the gas pipe in the kitchen), and then cover it with glue and varnish to preserve the image and create a visual effect.

Do not forget to clean and degrease the pipe first.

Paint the pipe with patterns

To give the appearance of the pipe individuality, apply a pattern or ornament on it using stencils or patterns for spot painting, which can be continued on interior items, furniture, walls.

There are many options for patterns - these are Khokhloma and exotic Indian patterns, or simple geometric figures... The choice is limited only by your imagination and desire.

Use textiles, cords, twines

Use a rope or rope to wrap the gas pipe, having previously covered it with glue.

For beauty, you can weave or glue various decorative elements - plastic flowers or leaves, rhinestones and beads, shells brought from the sea. This method suitable for country or eco-style interiors.

Another natural material is bamboo. Here's how to hide a gas pipe with it. Pick up bamboo stick with inner diameter slightly larger than the diameter of the gas pipe, cut it lengthwise and wrap the gas pipe. The result will impress you.

Use a gas pipe or hose as part of the rail system

The option will do you, if the gas pipe runs along the entire work surface kitchen, while it is impossible to hide it inside the cabinet or close it with a false panel. In this case, paint the pipe with a chrome-like paint.

And above or below it, fix the rails on which you will hang hooks for kitchen utensils, light shelves. At the same time, it is forbidden to hang them on the gas pipe itself.

One of effective ways remove the gas pipe from your eyes so that it does not spoil the interior - close it with kitchen cabinets.

There are several secrets on how to close the gas pipe in the kitchen with kitchen furniture.

When designing kitchen set it is necessary to provide in advance the necessary niches and slots for the gas pipe, cabinets in which gas pipes are hidden should not have back walls.

If a gas meter is placed in them, provide sufficient space for it and do not overlap it with shelves or kitchen utensils, when placing gas boiler provide for the possibility of installing an effective ventilation system.

Do not pinch the gas pipe from above or below, do not hang interior items on it. In cabinets through which a gas pipe passes, use blind doors, since the pipe will be visible through the transparent doors. The main condition is to ensure free access for servicing gas equipment.

The most difficult way without using the transfer of the gas pipe in the kitchen is to hide it with the help of false panels or a decorative collapsible box. This option allows you to hide the elements of gas equipment, while maintaining free access to it, as required by safety precautions.

Using drywall

It is easiest to make a collapsible box using drywall, which is the most versatile and convenient material for installation and subsequent finishing.

The principles of working with it are simple and known to any master, if desired, these works can be done independently. The main point is that the box should not look bulky, have an easily dismantled or removable part for access to the pipe at any time.

Instead of drywall, for the manufacture of false panels, you can use chipboard, plywood or wall panels.

The main thing to remember is that gas equipment carries an increased danger and apply the above methods with caution and taking into account the requirements for accessibility to it.

Photo of the design of the gas pipe in the kitchen

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 according to building codes and rules for the design of the respective 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 connecting mobile units, portable gas burners, gas appliances, Instrumentation and automation devices are allowed to provide rubber and rubber-fabric sleeves. 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 are allowed 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. V industrial premises industrial enterprises, including boiler houses, buildings of enterprises 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 monolithic construction with the subsequent termination of pipes 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.

The laying of 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 premises 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 premises 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; waste bins premises; 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 where the air temperature can be below 3 ° C, it should be provided thermal insulation from non-combustible materials.

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

at the entrance of the gas pipeline inside the premises;

on branches to each unit;

in front of burners and igniters;

on blowdown pipelines, at the points of their connection 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 shut-off device at the inlet is considered to be a valve or a crane in front of the GRU or the meter.

Installation of fittings on gas pipelines laid in channels, in concrete floor or in furrows of walls is not allowed.

6.14. * The need for gas consumption metering 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 of Gasprom, and " General provisions on the procedure for accounting and control of fuel consumption, electric and thermal energy for industrial, 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.

By 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.

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

6.16. 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 furnaces or devices in accordance with the requirements of clause 6.46.

On the gas supply pipelines to cooking boilers, restaurant stoves, heating stoves 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 gas pipelines should not cross ventilation grates, window and doorways. In industrial premises, the intersection of light openings filled with glass blocks is allowed, as well as the laying of a gas pipeline along the frames of non-opening windows.

6.19. Minimum distances in the light 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 lines communications and wire broadcasting ", approved by the Ministry of Communications of the USSR in the prescribed manner.

6.20. Distances between gas pipelines and engineering communications 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.

The connection to the gas pipeline of gas appliances, laboratory burners, as well as portable and mobile gas burner devices and units installed in the workshops of industrial enterprises is allowed to 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 an installation instead of blowdown pipelines locking device with a blind plug.

6.28. Distance from the end sections of the purge pipelines to the intake devices supply ventilation 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 window (transom), exhaust ventilation duct and daylight.

In this case, 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 kitchens with a height of at least 2.2 m and a volume of at least 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 window or 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 sloped 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 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, 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 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. At the same time, 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 plates 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 plate 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 devices is allowed 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.

In one room, 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.

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 for rearrangement gas water heaters from the bathrooms, in which they were placed 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 case by the design organization in agreement with the local operating organizations of the gas economy.

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

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

6.38. Installation of gas flowing 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. * The room intended for the placement of a gas water heater, as well as a heating boiler or heating apparatus, 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 grating 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 basements and basement floors buildings for 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 light, and they are supplied with gas from natural gas.

6.45. It is allowed to transfer heating and heating and 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 fireboxes 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 window, or a door opening into non-residential premises or 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 automatics in accordance with the requirements provided for in Sec. eleven.

The room in which the installation of a gas fireplace or air heater is envisaged 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.

COMBUSTION PRODUCTS CONDITIONER

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, subject to the introduction of combustion products into the chimney on different levels, not closer than 0.75 m from one another, or at the same level with the device in the chimney cut to a height of not less than 0.75 m.

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

3. Connection to the chimney is allowed heating furnace intermittent operation of a gas water heater used for hot water supply, or other gas appliance that does not work continuously, provided that it operates at different times and has a sufficient chimney section 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 for 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 horizontal sections of chimneys with a total length of not 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 assigned 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 appliance to the chimneys, a “pocket” device with a cleaning hatch should be provided.

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

9. The distance from the connecting chimney to the ceiling or wall made of non-combustible materials should be taken 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 the dampers installed on the chimneys from the 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 ridge of the roof when they are located (counting horizontally) not further than 1.5 m from the ridge of the roof;

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) - not less than 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 tubes 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, it 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 an estimated outside air temperature below minus 40 ° С and for 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 pass 100% inspection of the weld by 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 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

Pipe standard or specification	Steel grade, steel standard	Outside pipe diameter (incl.), Mm
1. Electrowelded longitudinal seam GOST 10705-80 (group B) "Technic skye words "And GOST 10704-91" Range "	VSt2sp, ВСт3сп not less than the 2nd category GOST 380-88; 10, 15, 20 GOST 1050-88
2. Electrowelded TU 14-3-943-80	10 GOST 1050-88	219-530
3. Electric welded for main gas and oil pipelines (longitudinal and spiral seam) GOST 20295-85	ВСт3сп not less e 2nd category (K38) GOST 380-88; ten ( K34 ), 15 (K38), 20 (K42) GOST 1050-88	According to GOST 20295-74
4. Electric-welded longitudinal GOST 10706-76 (group B) "Technical requirements" and GOST 10704-91 "Range"	VSt2sp, VSt3sp not me her 2nd category GOST 380-88
5. Electros cooked with a spiral seam GOST 8696-74 (group B)	VSt2sp, VSt3sp not less than the 2nd category GOST 380-88
6. Seamless hot-deformed GOST 8731-87 (group B and D) "Technical requirements" and GOST 8732-78 "Range"	10, 20 GOST 1050-88
7. Seamless cold-deformed, heat-deformed GOST 8733-87 (gr unit C and D) "Technical requirements" and GOST 8734-75 "Range"	10, 20 GOST 1050-88
8. Electric-welded spiral seam 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 PP. 6 and 7 follows at change how great vilo, for gas pipelines of the liquid phase of LPG. 2. Excluded. 3. For warm lovy elect rostants I tru would be made of steel 20 to be used in areas with a design temperature of up to minus 30 ° 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 according to TU 102-39-84 with a corrosion-resistant coating according to 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 to perform 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 on state standards and the specifications 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 carrying out 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.

Replacing the gas valve is one of the most common operations during repair work with gas communications. As a result of long-term operation, the valve is worn out, which leads to gas leaks.

Solving the problem with the help of specialists

Leakage is one of the most dangerous problems that residents can face. If there is a smell of gas, it is necessary to check the tightness of the tap using soap foam, which must be applied to pipe connection and a valve. If foam bubbles, there is a leak in this area. In this case, you should immediately seek help from specialists to replace worn out parts of the system.

To solve the problem, you need to prepare:

• gas valve (you first need to call the service company and find out the need to purchase it);
• documentation (gas supply contract, technical passport).

Step-by-step instruction

1. Contact your gas supplier or licensed given view activities of a private company. By phone, you should tell about the nature of the malfunction and leave a request.
2. Purchase a crane from a store that specializes in this group of products. Recommended to buy ball valve(nut-nut), since such a device has proven itself for its reliability and longer service life in comparison with the cork competitor.
3. Before the arrival of specialists, prepare a gas supply contract and a technical passport.
4. Let the gas in the pipe burn out. To do this, light the gas and turn off its supply with a tap near the gas meter. Wait until the flame has completely extinguished. This operation will save time, since the specialists will not start work until the gas burns out.
5. Before starting repair work, you need to ventilate the room. It is recommended to create a draft - this will allow the gas to evaporate faster.
6. When carrying out work on replacing the crane, it is advisable to be near the repairmen. This should be done so as not to interfere with their work, but at the same time to control its quality and monitor compliance with safety regulations.
7. After the device is replaced, it should be checked for leaks with the worker by turning on the burner in a test mode.
8. The employee must make a note of the work done in the documentation and put the seal of the service organization.
9. It is recommended to leave the windows open for about half an hour, as the room must be well ventilated.

Do-it-yourself crane replacement

To replace the tap with your own hands, you need a tool (gas wrench), a gas tap and an FUM tape (you can also use special compounds to seal the threaded connections). All of the above can be purchased at specialized stores or construction department stores. It is more convenient to replace the gas valve with an assistant.

It should be noted: the pressure in the gas pipeline is relatively low (in contrast, for example, to the water supply). Based on this, it is not necessary to shut off the entire gas network. However, security measures still need to be taken. First of all, when carrying out work, the window must be open. Doors to the kitchen should be tightly closed, and the cracks should be plugged with rags or towels.

We begin work with dismantling the used gas valve. We remove it with a gas wrench. As soon as the faucet was removed, we plug the pipe with a thumb pad. At this time, the assistant winds the FUM tape onto the new tap or applies it to threaded connection sealant.

Please note: before winding the FUM tape or processing with a sealing compound, the connection must be cleaned of dirt, dust and traces of corrosion.

When everything is ready, carefully, but without wasting time, we attach the gas valve to the pipe. Before screwing on the new valve, you need to make sure that it is in the "closed" position.

Next, you need to make sure that the connection is tight. For this, the old proven method with soapy water is used. A soapy solution should be applied to the joint and if bubbles appear, the joint will leak. It is necessary to correct the defect urgently: remove the tap and repeat the sealing of the connection.

At the end of the work, you should thoroughly ventilate the kitchen and connect the gas stove to the system. Even in the absence of professional skills, the operation to replace the gas valve takes no more than 15 minutes. Plus in doing the work with your own hands - substantial savings funds. However, if there is no certainty about own forces, it is better to entrust this work to specialists from the service department of the gas supplier.

Replacing the valve in the gas cylinder

Any work in the course of which the tightness may be compromised may only be carried out by qualified specialists. It is dangerous to carry out such actions on your own (dismantling and installing locking devices). Although it should be noted that there is nothing particularly difficult in this operation.

Note! At the factory, the threaded connection is sealed with paint. If the replacement is done by hand, you can use FUM tape for gas as a sealant.

Dismantling and installation of locking devices on cylinders is carried out with a special mechanical wrench for screwing in and out of valves. If it is not present, manual replacement of the shut-off devices is permitted.

Note! In this case, there is no risk of explosion of a heated gas cylinder, since mixtures of fuel vapors with air are explosive.

There are no such mixtures in the cylinder, it contains only gas vapors. However, when heating the cylinder, you need to monitor the pressure, it should not exceed the allowable one.

Installation of the shut-off device is carried out with a torque wrench, for which the tightening torque for steel valves does not exceed 480 Nm, for brass valves this figure should not exceed 250 Nm.

Technical parameters of valves used for installation on cylinders with liquefied natural gas(propane / butane) are:

• valve VB-2 with a maximum working pressure of 1.6 MPa;
• nominal bore diameter - 6 mm;
• dimensions: 61x54x105 mm.

Before replacing the valve, drain the condensate from the cylinder (this recommendation is often ignored). Condensation must be drained away from your home as it has a very unpleasant and persistent odor.

Reducers in cylinders are designed in such a way that they cannot be disassembled. They cannot be adjusted or repaired. Gearboxes should be replaced at least every 6 years. It is recommended to check the hoses for leaks at each cylinder change, but at least every six months. In this case, it is advisable to install multilayer and reinforced hoses.

All operations with gas equipment are dangerous if they are not carried out by a specialist. Therefore, any independent actions replacement of gas taps are carried out at your own peril and risk.

Gas pipeline suitable for kitchen stove or the boiler in the apartment must be equipped with a special valve. It is necessary to shut off the flow of gas in the event of a leak, prolonged absence or installation of new equipment. The gas valve needs to be changed periodically, as over time its shut-off mechanisms wear out and begin to let fuel through. Before buying, read the recommendations of experts who will help you make the right choice.

main parameters

Shut-off valves are an obligatory element of the gas pipeline, which is used both on external highways and on internal systems, only the diameter and size differ. For household gas pipelines in an apartment or a private house, a gas ball valve with a diameter of 2-1 / 2 inches is used.

A separate valve is installed for each source of consumption - if a boiler and a gas stove are installed in the house, there should be at least 2 taps.

If bottled (liquefied) gas is used, shut-off valves are not required. A valve is already installed on the cylinders, which regulates the fuel supply.

When selecting the best option there are several factors to consider. There are 2 types of valves:

1. Cork products. The design has a conical part and a flywheel that drives the first one. The plug is equipped with a hole, which, when connected to the pipe connector, facilitates the flow of fuel to the equipment. The stuffing box in this case is used as a seal.

1. Gas ball valve. Here, all the work is done by a metal ball, which plays the role of a locking piece. The ball has a through-hole for gas outlet to the equipment. This is done by turning the flywheel. Devices are considered the most reliable, which is why they are most often used in a domestic environment.

The plug valve is characterized by a loose connection and a shorter service life. They are no longer used today.

It should be noted that the second version of the gas valve is subdivided into subspecies according to the fixation method:

	It is used for household gas pipelines, it has a small diameter. The connection to the pipe is carried out by means of a thread. The crane is collapsible.
	Scope of application - pipelines of increased diameter. The connection is established by assembling the flanges with bolts. Collapsible design.
	It is used for large pipelines with a diameter of up to 70 mm. It is welded to the main line, dismantling is not allowed. Can only be applied once.

With threaded and flanged connections, you can easily replace the gas valve in the apartment with a new one or remove and reinstall it several times. The welded valve is mounted only once.

VIDEO: Ball valve design

What to consider when buying a gas faucet

To buy a high-quality standard or angle gas faucet, you need to pay attention to the following nuances:

1. Cut size of piping system, hoses and threaded areas. There is a certain diameter on the gas supply pipe; taking this indicator into account, a valve must be selected. This is done so that the device hermetically closes all gaps. Otherwise, you will need to purchase additional adapters and adapters.
2. Material. Have the longest operational life cast iron products so they are recommended by experts. In addition to these options, manufacturers offer polyethylene gas taps, zinc, silumin.
3. Integrity. Since tension gas valves are sold in large batches, during transportation they can get various defects in the form of chips and cracks. Also, a factory defect in the form of influxes is often found. This informs about non-compliance with government regulations in the production process.
4. Manufacturer. In order not to fall for a low-quality fake, it is recommended to give preference famous brands... Responsible manufacturers include a Polish company Broen ballomax, the German company Dungs and Bugatti.

VIDEO: How to spot fake Bugatti cranes

Installation of valves

Depending on the type of locking element, it can be installed with your own hands without the involvement of specialists. To do this, you need to study in detail how to change the gas valve in the apartment and prepare all the necessary tools.

For work you will need:

• new threaded gas valve;
• 2 wrenches- one for screwing in, the second for holding the branch pipe in a stationary position;
• graphite grease for gas taps;
• linen thread;
• stub.

Installation steps:

1. Before changing the gas valve, you need to shut off the gas flow to the kitchen, boiler room or other room where work is planned. Turn the valve lever to the closed position.
2. Unscrew the tap from the outlet pipe. If the actions are difficult to carry out, you need to process the joint area with WD40. This component will provide a smooth ride. If there is a welded element in the house, then it is cut off with a grinder, after which a new thread is created on the pipe.
3. At the time of the end of dismantling, the pipe should be quickly closed with a plug. If the work is done together with a partner, you can do without the locking piece and ask to cover the exit with your hand.
4. The threaded part is wrapped with linen thread to improve sealing, after which it is lubricated with graphite agent.
5. Next, a new gas valve is screwed on.

During installation work, open windows and doors in the room, and turn off electrical equipment. The best option will happen if you turn off the electricity meter before installation. This will provide a safe environment for this task.

How to check the joint for leaks

The final stage in the installation of the gas valve is to check its docking connection for leaks. To do this, prepare a concentrated soap solution, which lubricates the gas valve on the boiler, and more precisely, the area of ​​fixation to the pipe.

The soap should be as foamy as possible, otherwise it will be impossible to detect a leak if it forms.

Next, open the valve so that gas begins to flow from the gas pipeline and carefully observe the process. If the element itself or the junction is leaking fuel, the soap solution will begin to foam. Here you will need to shut off the gas supply, dismantle the shut-off piece and install it again.

A few words in conclusion

Experts do not recommend using a welded type of cranes. Despite a fairly strong design, if a mistake is made, welding can pass gas, and to solve the problem, it will be necessary to carry out work again, but with a new valve. Therefore, it is better to give preference to threaded variations.

Remember! Carrying out self installation is considered a very risky and unsafe activity. In the absence of the necessary experience, it is recommended to contact gas workers, especially since the price for their services is acceptable - 300-500 rubles.

VIDEO: How to replace a gas tap