The distance from the house to the gas pipe (gas pipeline) is the distance necessary for the safety of the structure, which is selected, depending on several components, according to the standards. The installation method, the level of safety of the gas pipeline, the delivery system and the pressure under which the liquid fuel is supplied all play a role. Determination of the required distance from a residential building on the site to the gas pipe is provided for in SNiP 42-01-2002 in relation to the pressure of the supplied raw material: low, medium or high. The regulatory document entitled “Gas distribution systems” provides the necessary conditions aimed at various situations.

Near the city

To determine the required distance from the gas pipe, after developing a residential building project, citizens of the Russian Federation apply for the appropriate permit (approval) from the local gas distribution organization. For a definite answer, you need to know the type of gas pipeline and what pressure is used when supplying it. If there is no data on the type of laying and the pressure in the pipes, it is impossible to give an unambiguous answer.

Gas distribution station

SNiP 42-01-2002 is one of the natural results of the Federal Law of the Russian Federation “On Technical Regulation” No. 184, adopted in December 2002. In November 2008, the Government of the Russian Federation adopted Resolution No. 858, according to which the current sets of rules were developed and approved. This SP was approved at the legislative level in an updated version and was named SP 62.13330.2011.

Registration by Rosstandart made it the source of the standard that is followed when laying and connecting gas pipes to the building.

The most affordable type of fuel has become widespread and has become a publicly available energy resource. Its widespread use has led to the urgent need to develop regulatory documents in which the permitted distances can be found.

Compressor station

Since 2010, SNiP registered by Rosstandart:

• are legislative documents, compliance with which is mandatory;
• checked by supervisory organizations designed to ensure the safety of such structures;
• may be the basis for a decision in a lawsuit;
• are recognized as a significant reason for imposing an administrative penalty upon violation.

Read also: At what distance from the fence can a bathhouse be built: SNiP norm 2018-2019 in SNT and individual housing construction

SP 62.13330.2011 regulates the distances that must be observed depending on the type of laying of the main gas pipeline or its branches and the pressure of liquid fuel in the pipes.

Near a residential building

If gas is supplied in cylinders, only the prescribed fire safety standards must be observed. More economical and volumetric transportation in pipes provides for differentiated requirements for different types of supplies and pressure levels during their implementation.

Connection diagram

Types and levels

The population is supplied with high-calorie gas, the most optimal option for domestic use. The safety level of fuel transported through main pipes is considered higher than its movement and use in cylinders. The laying of pipes for this purpose depends on the terrain and the required operation and is divided into 3 types:

1. Overhead communications are the least problematic type of installation, which is also used in summer cottages due to the absence of the need for expensive work both during the assembly process and when repairs are necessary. It is made only of steel (as regulated in SNiP), but no special strictness is specified in the distance to the building. The only requirement is a two-way security zone around the pipe of at least 2 m.
2. Underground pipelines are recognized as the safest installation method, with minimal likelihood of damage from external causes. They can be made of polymer or steel pipes, but here the distance is normalized depending on several components.
3. Internal networks are located inside the building, they must be left in the public domain, and assembly must be made only from steel and copper. There are also standards for internal networks - they are determined by the object of consumption and its installation, taking into account everything that could pose a potential threat of fire or explosion, right down to the chimney.

Table of distance of buildings from the gas pipeline according to SNiP standards

Underground gas pipeline

For underground structures, the distance at which a residential building can be placed during planning and development is dictated by the diameter of the pipe and the pressure under which the gas is supplied.

It is believed that the pressure level of liquid fuel and its supply under high pressure are directly proportional.

The higher the pressure during transportation, the greater the potential danger to a residential structure. That is why the distance from the gas pipe to the house must be strictly observed.

Table of distances from the gas pipeline to buildings

To obtain permission, calculations are made by type of communications:

• considered low is up to 0.05 kgf/cm2 - supplied for residential, specialized and public buildings;
• a gas pipeline with medium pressure (from 0.05 kgf/cm2 to 3.0 kgf/cm2) is needed in city boiler houses or in the main line if the city is large;
• high pressure can be used in industrial facilities or in a separate project, used quite rarely.

We bought a plot for the construction of a residential building. The neighbor's gas pipes were laid from the fence at a distance of 30 cm, parallel to the fence, to our site. These pipes are not main pipes. The main pipe is on the other side. The neighbors connected their pipe to it and ran it through our site. At what distance from this pipe can we now build a house? We want it at a distance of 70 cm from the pipe (the house design is already ready). Is it possible to do this?

Experts from Gazprom Mezhregiongaz Pyatigorsk LLC answer

If the house project is already ready, then you need to coordinate it with the local gas distribution organization and determine the location of connection of the household. It is impossible to answer your question unambiguously, since there is no information available on the type of gas pipeline laying and its pressure.

1. If the gas pipeline is underground: According to SNiP 42-01-2002 Gas distribution systems, updated version SP 62.13330.2011 Appendix B, the distance from gas pipelines to the foundations of buildings and structures with a nominal diameter of up to 300 mm: - up to 0.005 MPa - 2 meters; - St. 0.005 to 0.3 MPa – 4 meters; - St. 0.3 to 0.6 MPa – 7 meters. over 300 mm: - up to 0.005 MPa – 2 meters; - St. 0.005 to 0.3 MPa – 4 meters; - St. 0.3 to 0.6 MPa – 7 meters. Also, according to 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 is established for gas distribution networks along the routes of external gas pipelines - in the form of a territory limited by conditional lines running at a distance of 2 meters on each side of the gas pipeline.

2. If the gas pipeline is above ground: The distance to residential buildings is not standardized. It is only necessary to comply with the conditions for the intersection of the gas pipeline with window and door openings - 0.5 m and below the roof - 0.2 m.

Gas communications require more serious attention during design and installation than other utility networks.

This is justified by the fact that gas consuming installations are particularly dangerous objects that are subject to strict accounting and control.

Connecting a gas pipeline to the house and supplying gas appliances with fuel is quite a labor-intensive and costly task.

Necessity of design

The main task of engineers when designing gas systems is to ensure a non-stop supply of fuel to all devices.

In this case, it is necessary to take into account a number of requirements for gas-using devices and systems that supply gas to consumers.

All design standards are specified in special technical literature - state standards, codes of practice and reference books. Knowledge of these rules is the prerogative of competent specialists.

That is why gas supply design should be carried out not just by civilian specialists, but by staff members of design departments.

Without a project approved and agreed upon by the gas service, it will be impossible to begin installation of the system, much less its operation.

Authorized organizations

In each city there are a number of organizations that provide their services in the field of designing dangerous devices. Such objects include not only gas pipelines, but also other elements of gas consuming networks and boiler houses.

As a rule, after their creation, all design organizations are required to become members of self-regulatory organizations (SROs). Otherwise, the company will not be able to participate in tenders and receive serious orders.

The presence of an organization in the SRO structure guarantees customers safe and competent performance of work. In case of failure to fulfill the terms of the contract or poor quality of services, a design company that has an SRO certificate risks not only its reputation, but also its financial resources.

SRO certificate. (Click to enlarge) Membership in the SRO can only be obtained by those companies that permanently employ at least two gas supply system design engineers.

The qualifications and knowledge of these specialists are checked every three years by a special commission. After successfully passing the exam, engineers receive certificates.

Contrary to popular belief, an organization does not have to have a license. Licensing of project activities was cancelled.

Be careful: Before ordering a gas supply project from the selected company, you need to inquire about the availability of an SRO certificate and full-time specialists in gas systems.

When concluding a contract, it is important to clarify that the contractor assumes the responsibilities for measurements, visits to the gas service, coordination and approval of the project. This clause will allow the customer to relieve himself of responsibility for the design process and results.

List of required documents

In order for designers to begin work, the customer must provide design data. This includes:

• technical conditions for connection to gas networks obtained from Gorgaz;
• situational site plan issued by the Administration of the locality;
• geological research protocol, which is carried out by specialized organizations;
• house plan indicating the desired placement of equipment.

House plan example. (Click to enlarge) The house plan can be reproduced by a design engineer if the building already exists.

At the same time, he will be able to carry out all the necessary measurements.

When designing, a specialist may need:

• distance from the gas supply source to the walls of the house;
• dimensions of the premises;
• the distance between structures, buildings and communications located on the site.

Only if all the initial data is available can the engineer begin calculations and drawings.

Gasification project for a private house. (Click to enlarge) A competent project is always supported by calculations. The first thing the designer must do is calculate the gas consumption required to supply all gas-using appliances at home. When this figure is received, planning of the gas pipeline route begins.

Taking into account the requirements of the standards, the engineer will conduct gas from the main pipeline to the house. A shut-off valve will be installed at the tie-in, and a meter will be installed at the entrance to the house.

The choice of equipment and devices falls on the shoulders of a specialist, but the wishes of the customer are taken into account. All selected equipment must be purchased in specialized stores. This will help protect against counterfeits and low-quality goods.

When handing over the facility to a gas service representative, you must provide technical documentation - passports and certificates - for each gas-using appliance. These documents can only be provided by serious organizations responsible for the products sold.

Example of hydraulic calculations. (Click to enlarge) When the equipment is arranged and the pipes are routed, the engineer will make a hydraulic calculation of the gas pipeline. This is necessary in order to determine the pipe sizes and pressure losses in the system.

Having confirmed the operability of the gas network, the engineer will draw up a specification of equipment and materials.

As a result, the project should contain several sheets:

• floor plans and sections of the house indicating the installation locations of appliances and gas pipeline layout;
• network diagrams from the connection point to the devices;
• diagrams of assembly units and recommendations for construction;
• description of measures to protect against negative impacts;
• recommendations for maintenance and operation of the gas consumption system;
• specification of equipment and materials.

Important point: the finished project must be agreed upon with the technical department of the service that issued the technical specifications.

All changes that will be made to the agreed project as a result of construction must be re-approved. As-built documentation, which reflects the work actually completed, will be stored in the Gorgaz archive.

Therefore, to avoid unnecessary misunderstandings, the final design must fully comply with the installation.

Design requirements

The only essential condition that must be met unquestioningly is full compliance of the project with the requirements of regulatory documentation. Experienced specialists are well aware of these rules and have encountered them in practice more than once.

For each project, you need to thoroughly study the clauses of the standards again and again. Requirements for gas networks may vary depending on construction conditions, the method of laying the gas pipeline, the type of equipment installed and many other things.

If the designer does not comply with at least one essential rule, the project will not pass the test and will be returned for revision. Specialists from the technical department of gas services thoroughly check the documentation. Therefore, it can sometimes take a whole month for a project to be approved.

Watch the video, which discusses the negative consequences of violating the design gas supply scheme for a residential building:

Many owners of dachas and private houses often provoke legal proceedings themselves by building houses or any other buildings so that, for example, the neighbor’s “plot” is buried in the shadows. But there is a whole list of rules and regulations that provide for distances, lengths, heights and other parameters during the construction and laying of engineering lines (water pipelines, gas pipelines, etc.)

We will present the most common of them during individual construction - knowing them will help you not make mistakes, so that later you do not have to demolish what you built with your own hands and start construction again.

There are regulations for laying utility networks

Furnace

If the standards are not met, gas services may prohibit connection to the gas pipeline. This is what furnaces and kitchens with gas stoves should be like.

• Ceiling height - at least 2.4 m (2.2 m with a boiler power of less than 60 kW).
• The window (necessarily with a window) must have a glazing area of ​​0.03 square meters. m per 1 cubic. m of room volume, but not less than 0.8 sq. m.
• The volume of the room for 1 boiler is convenient for maintenance, but not less than 7.5 cubic meters. m. For 2 boilers - at least 15 cubic meters. meters
• For installations with a power of more than 60 kW - a gas alarm.
• When installing boilers in the basement, in free-standing furnace floors - a gas alarm.
• Size - according to the boiler passport.

The kitchen has its own rules. If the stove is gas, the following requirements are met:

• the distance from the gas meter to the electric meter is at least 0.5 m;
• the distance from the gas meter to gas appliances is at least 1 m;
• when installing 4-burner stoves, the volume of the room is at least 15 cubic meters. m;
• when installing 2-burner stoves, the volume of the room is at least 8 cubic meters. m;
• ventilation in the kitchen - duct D 200 mm;
• ceiling height – at least 2.2 m.

Standards for underground gas pipeline:

• the distance of the underground gas pipeline to other communications with parallel installation is 1 meter;
• underground distance d. (low pressure) gas pipeline to buildings (sheds, gazebos) - at least 2 meters;
• underground distance d. gas pipeline to wells - at least 1 meter;
• underground distance d. gas pipeline to power lines - at least 1 m;
• underground distance gas pipeline to trees - at least 1.5 meters;
• the distance from the burner to the opposite wall is at least 1 m;
• safe distances from the gas tank to objects on the site.

The system should be located at a distance (in particularly cramped conditions, distances can be halved):

• from a residential building -10 meters;
• from the fence on the foundation and the garage -2 meters;
• from the septic tank - 5 meters;
• from the well -15 meters;
• from a tree with a developed crown -5 meters;
• from the power line - one and a half heights of the support.

Distances between houses and buildings - standards and regulations

The distances between houses are determined by the rules, but can be reduced if lighting standards are observed and if the rooms are not visible from window to window:

• between the long sides of residential buildings with a height of 2-3 floors - at least 15 meters, and a height of 4 floors - at least 20 meters;
• between the long sides and ends of the same buildings with windows from living rooms - at least 10 meters;
• in estate development areas, the distance from the windows of residential premises (rooms, kitchens and verandas) to the walls of the house and outbuildings (barn, garage, bathhouse) located on neighboring plots of land must be at least 6 meters;
• outbuildings are located from the boundaries of the site at a distance of 1 meter.

It is allowed to block outbuildings in adjacent areas by mutual consent of the homeowners.

At what distance from each other should utility networks be located? This table reflects internecine relations.

Lawyer's opinion (K. Andreev)

The most common subject of controversy is unauthorized buildings(if there is a construction permit, then it must take into account the standards - SNiP).

The second type of violation is construction on a site that does not belong to the “builder” (this is called squatting). An example would be a fence being moved. According to paragraph 17 of Article 51 of the Town Planning Code of the Russian Federation, some objects do not require a building permit: gazebos, sheds.

A permit is required, so it is important what you are actually building: if according to the technical passport you have a garage, but in fact a residential building, the construction can be challenged in court.

The third subject of controversy is building that does not meet standards. For example, if a site is intended for gardening, construction standards SNiPZO-02-97 (“Planning and development of territories of gardening associations of citizens. Buildings and structures”) are applied to it. According to paragraph 1.1 of this SNiP, norms and rules apply to the design and construction of houses. You cannot build an 8-story house in a gardening partnership (and such cases do happen) - neighbors have the right to sue, and such a building will be demolished.

If the site is intended for individual housing construction, other standards apply - a set of rules for urban planning, planning and development of urban and rural settlements (version SNiP 2.07.01-89, approved on December 28, 2010). In disputes about non-standard buildings, it is necessary to establish what kind of building is in front of us. An expert arrives, inspects the property and makes a verdict: “This is a garage” or “This is a low-rise building.” It is then decided what regulations the disputed structure falls under, and then the defendants are forced to prove that it complies with the regulations. For fences there is a separate SNiP 30-02-97, clause 6.2. It states that areas should be fenced, taking into account minimal shading of neighboring ones - fences should be lattice, up to one and a half meters high. By decision of the general meeting of gardeners, the installation of blind fences on the side of the street and driveway is allowed.

Claims that are filed for violation of rights are called negatory. The reason for filing them is an obstacle to the use of your land, which is caused by a neighbor (he has illegally invaded your territory and is obscuring it). The owner may demand that all violations be corrected. The statute of limitations in this matter is 3 years from the moment the victim learned of the violation of his rights. This means that it doesn't matter at all when a neighbor moves a fence or builds a house right under your nose. It's important when you found out about it.

5.1.1 The placement of external gas pipelines in relation to buildings, structures and parallel adjacent utility networks 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 the distances regulated by regulatory documents are not possible), in certain sections of the route, between buildings and buildings, as well as gas pipelines with a pressure of over 0.6 MPa when they are brought closer together with detached ancillary buildings (buildings without permanent presence of people), it is allowed to reduce the distances specified in SNiP 2.07.01 and SNiP II-89 by up to 50%. In this case, in areas of approach and at a distance of at least 5 m in each direction from these areas, the following should be used:

seamless or electric-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 (ZH), or connected by butt welding with 100% control of the joints by physical methods.

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

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

5.1.2 The laying of gas pipelines should be provided underground and above ground.

In justified cases, it is allowed to lay gas pipelines above ground along the walls of buildings inside residential courtyards and neighborhoods, as well as in certain sections of the route, including sections of transitions through artificial and natural barriers when crossing underground communications.

Above-ground and above-ground gas pipelines with embankment can be laid in rocky, permafrost soils, wetlands and other difficult soil conditions. The material and dimensions of the embankment should be taken based on thermal engineering calculations, as well as ensuring the stability of the gas pipeline and embankment.

5.1.3 Laying gas pipelines in tunnels, collectors and canals is not permitted. An 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 places where fittings, equipment and control and measuring instruments (instruments) are installed. Detachable connections 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 pipeline entries into buildings should be enclosed in a case. The space between the wall and the case should be sealed to the full thickness of the structure being crossed. The ends of the case should be sealed with elastic material.

5.1.6 Gas pipeline entries into buildings should be provided directly into the room where gas-using equipment is installed, or into an adjacent room connected by an open opening.

It is not allowed to enter gas pipelines into the premises of the basement and ground floors of buildings, except for the introduction of natural gas pipelines into single-family and semi-detached houses.

5.1.7 Shut-off devices on gas pipelines should be provided:

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, with the exception of gas distribution points of enterprises, on the gas pipeline branch to which there is a shut-off device at a distance of less than 100 m from the gas distribution point;

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

on branches from gas pipelines to settlements, individual microdistricts, blocks, groups of residential buildings, and when the number of apartments is more than 400, to a separate house, as well as on branches to industrial consumers and boiler houses;

when crossing water barriers with two lines or more, as well as with one line when the width of the water barrier at a low-water horizon is 75 m or more;

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

5.1.8 Shutting off devices on above-ground 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 of at least:

for low pressure gas pipelines – 0.5 m;

for medium pressure gas pipelines – 1 m;

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

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

In areas of transit laying of gas pipelines along the walls of buildings, the installation of disconnecting devices is not allowed.

5.2.1 Gas pipelines should be laid at a depth of at least 0.8 m to the top of the gas pipeline or casing. In places where traffic and agricultural machinery are not expected, the depth of laying steel gas pipelines can be at least 0.6 m.

5.2.2 The vertical (clear) distance 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 places where gas pipelines intersect with underground communication manifolds and channels for various purposes, as well as at places where gas pipelines pass through the walls of gas wells, the gas pipeline should be laid in a case.

The ends of the casing must be brought out at a distance of at least 2 m on both sides from the outer walls of the crossed structures and communications, when crossing the walls of gas wells - at a distance of at least 2 cm. The ends of the casing must be sealed with waterproofing material.

At one end of the case at the top point of the slope (with the exception of places where the walls of the wells intersect), a control tube should be provided that extends under the protective device.

In the interpipe space of the casing and the gas pipeline, it is permitted to lay an operational cable (communications, 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 in accordance with GOST R 50838 of at least 2.5.

It is not allowed to lay gas pipelines from polyethylene pipes:

on the territory of settlements at pressure above 0.3 MPa;

outside the territory of settlements at pressure above 0.6 MPa;

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

when the temperature of the gas pipeline wall under operating conditions is below minus 15 °C.

When using pipes with a safety factor of at least 2.8, it is permitted to lay polyethylene gas pipelines with pressures exceeding 0.3 to 0.6 MPa in settlements with predominantly one- to two-story and cottage residential buildings. In the territory of small rural settlements, it is permitted 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 Depending on the pressure, overhead gas pipelines should be laid on supports made of non-combustible materials or along the 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 above the roofs of buildings of children's institutions, hospitals, schools, sanatoriums, public, administrative and domestic buildings with large numbers 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 GRP buildings.

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

5.3.3 High-pressure gas pipelines should be laid along blank walls and sections of walls or at least 0.5 m above the window and door openings of the upper floors of industrial buildings and adjacent administrative and domestic buildings. 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 frames or mullions of non-opening windows and cross window openings of industrial buildings and boiler houses filled with glass blocks.

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

5.3.5 On pedestrian and automobile bridges built from non-combustible materials, it is permitted to lay gas pipelines with a pressure of up to 0.6 MPa from seamless or electric-welded pipes that have undergone 100% control of factory welded joints by physical methods. Laying gas pipelines over pedestrian and automobile bridges built from flammable materials is not permitted.

5.4.1 Underwater and overwater gas pipelines where they cross water barriers should be placed at a horizontal distance from bridges in accordance with Table 4.

5.4.2 Gas pipelines at underwater crossings should be laid deep into the bottom of the water barriers being crossed. If necessary, based on the results of floating calculations, it is necessary to ballast the pipeline. The elevation of the top of the gas pipeline (ballast, lining) must be at least 0.5 m, and at crossings through navigable and floating rivers - 1.0 m below the predicted bottom profile for a period of 25 years. When carrying out work using directional drilling - at least 2.0 m below the predicted bottom profile.

5.4.3 At underwater crossings the following should be used:

steel pipes with a wall thickness 2 mm greater 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) of 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 not less 2.8 in other cases.

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

5.4.4 The height of laying the surface passage of the gas pipeline from the calculated 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 span should be taken:

when crossing ravines and gullies - not lower

Table 4

0.5 m above GVV 5% probability;

when crossing non-navigable and non-floating rivers - at least 0.2 m above the water supply line and water line of 2% probability, and if there is a crutch boat on the rivers - taking it into account, but not less than 1 m above the water supply line of 1% probability;

when crossing navigable and raftable rivers - no less than the values ​​​​established by design standards for bridge crossings on navigable rivers.

Shut-off valves should be placed at a distance of at least 10 m from the transition boundaries. The transition boundary is considered to be the place where the gas pipeline crosses the high water horizon with a 10% probability.

5.5.1 The horizontal distances from the places where underground gas pipelines intersect tramways, railways and highways must be no less than:

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

to the turnout area (the beginning of the switches, the tail of the crosses, the points where suction cables are connected to the rails and other track intersections) - 4 m for tram tracks and 20 m for railways;

to the contact network supports – 3m.

It is permitted to reduce these 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 city streets should be laid in cases. In other cases, the issue of the need to install cases is decided by the design organization.

Cases must meet the conditions of strength and durability. At one end of the case there should be a control tube extending under the protective device.

5.5.3 The ends of the casings when crossing gas pipelines of public railways should be placed at a distance from them not less than those established by 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 candle with a sampling device is installed at one end of the case, placed at a distance of at least 50 m from the edge of the roadbed (the axis of the outermost rail at zero marks).

In other cases, the ends of the cases should be located at a distance:

at least 2 m from the outermost rail of tram tracks and 750 mm gauge railways, as well as from the edge of the roadway of streets;

at least 3 m from the edge of the road drainage structure (ditch, ditch, reserve) and from the outermost rail of non-public railways, but not less than 2 m from the base of the embankments.

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

In other cases, the depth of laying the gas pipeline from the base of the rail or the top of the road surface, and in the presence of an embankment, from its base to the top of the casing, must meet safety requirements, but be no less than:

when performing open-pit work – 1.0 m;

when carrying out work using the method of punching or directional drilling and shield penetration – 1.5 m;

when performing work using the puncture method - 2.5 m.

5.5.5 The thickness of the walls of steel gas pipeline pipes when crossing public railways should be 2–3 mm greater 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 axis of the outer rail at zero marks) .

For polyethylene gas pipelines in these sections and at the intersections of highways of categories I–Ill, 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 more than 1 million people. when the seismicity of the area is 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 sources or more - main gas distribution stations with their placement on opposite sides of the city. In this case, high and medium pressure gas pipelines should be designed in a loop with their division into sections by shut-off devices.

5.6.2 Transitions of gas pipelines through rivers, ravines and railway tracks in excavations, laid in areas with seismicity of more than 7 points, must be provided above ground. The structures of the supports must ensure the possibility of movements of gas pipelines that occur during an earthquake.

5.6.3 During the construction of underground gas pipelines in seismic areas, in mined and karst areas, at intersections with other underground utilities, at the corners of turns of gas pipelines with a bend radius of less than 5 diameters, in places where the network branches, transition of underground to above-ground, location of permanent connections “polyethylene-steel”, as well as within settlements, control tubes should be installed every 50 m in linear sections.

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

With uniform heaving in pounds, the depth of laying 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 heaving soils;

not less than 0.8 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 tanks in heaving (except slightly heaving), medium and highly swelling soils, provision must be made for above-ground laying of liquid and vapor phase gas pipelines connecting the tanks.

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

5.7.1 To restore (reconstruct) 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 inclusive, drawing polyethylene pipes in a gas pipeline with a safety factor of at least 2.5 without welded joints or connected using parts with a seal, or connected by butt welding using welding equipment of a high degree of automation;

at a pressure from 0.3 to 0.6 MPa inclusive, stretching polyethylene pipes in a gas pipeline without welded joints or connected using parts with welded joints or butt welding using highly automated welding equipment with a safety factor for gas pipelines in settlements of at least 2, 8, and outside settlements – at least 2.5. The space between the polyethylene pipe and the worn-out steel gas pipeline (frame) along its entire length must be filled with sealing (sealing) material (cement-sand mortar, foam material);

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

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

In this case, it is allowed to save:

intersections of restored areas with underground utilities without installing additional casings;

depth of installation of restored gas pipelines;

distances 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 increases to 0.3 MPa.

Restoring worn-out steel gas pipelines with increasing pressure to high is permitted 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 ones and ensuring the integrity of polyethylene pipes. The ends of the reconstructed sections between the polyethylene and steel pipes must be sealed.