home Converter Gas pipeline welding diagram. Composition of the as-built documentation for the section “External gas pipelines” (GSN)

Gas pipeline welding diagram. Composition of the as-built documentation for the section “External gas pipelines” (GSN)

(SNiP 3.03.01-87)

Welding log welded joints(STO Gazprom 2-2.2-136-2007)

Pipe welding log (VSN 012-88)

Incoming inspection log

Author's supervision journal (to be filled out by the responsible person from the design organization)

Location of external gas pipeline networks in plan
Longitudinal profile of the gas pipeline
Scheme welded joints indicating the joints submitted for inspection

Construction of pits for gas pipeline supports
Preparation of foundations for gas pipeline foundations
Installation of gas pipeline supports
Concreting the foundations of gas pipeline supports
Installation of external gas pipeline brackets along the building facade
Anti-corrosion treatment of welded seams fastening external gas pipeline brackets
Preparing the surface of an overhead gas pipeline for painting
Priming the surface of an overhead gas pipeline
Painting the surface of an overhead gas pipeline
Construction of trenches for gas pipelines
Construction of a base for an underground gas pipeline
Laying an underground gas pipeline
Construction of a gas pipeline protective casing
Sealing the protective casing of a gas pipeline
Installing a protective layer for an underground gas pipeline, laying warning tape
Backfilling of underground gas pipeline trenches with layer-by-layer compaction
Reinforcement of the foundation for a gas control point
Concreting the foundation for a gas control point
Installation of gas control point
Steel gas pipeline insulation
Grounding device
Lightning protection device
Grounding device passport

5. Test and acceptance certificates:

Acceptance certificate for the completed construction of a gas distribution system facility (an order to the commission on acceptance of the completed construction facility from the customer is attached to the act)
Gas pipeline leak test report
Gas pipeline purge report
Protocol for non-destructive testing and mechanical testing of the tolerance joint. If the welder has not had a break in work for more than a month, a certificate certified by the contractor’s HR department is attached.
Orders from the contractor for responsible persons on control of welding works with a protocol for testing knowledge of specialists specified in the order
Order for a welder indicating the mark assigned to him
Certificate for checking electrodes indicating melting temperature
Protocols for measuring the resistance of grounding devices
Certificate of completion installation work
Mechanical test reports for welded joints
Ultrasonic testing protocols for welded joints. Attached is a certificate of certification of the non-destructive testing laboratory with certification of specialists from the non-destructive testing laboratory
Protocols of the results of radiographic testing of welded joints. Attached is a certificate of certification of the non-destructive testing laboratory with certification of specialists from the non-destructive testing laboratory
Certificate on carrying out commissioning works of GRPS
Permission from Gorgaz to operate the gas pipeline

6. Construction passport of an external gas pipeline

7. Certificates and certification protocols for welders

8. Certificates of manufacturers (their copies, extracts from them, certified by the person responsible for the construction of the facility) for pipes, fittings, welding and insulating materials

9. Technical passports of manufacturing plants (procurement workshops) or copies thereof for equipment, components, connecting parts, insulating coatings, insulating flanges, fittings, as well as other documents certifying the quality of equipment (products)

10. A copy of the passport for the pressure gauge used when testing the gas pipeline for leaks

11. Copies of certificates of state verification of control pressure gauges used at the site, certified by the contractor’s seal (“the copy is correct”)

12. Manufacturers’ instructions for the operation of gas equipment and appliances

13. , fire certificates, sanitary and hygienic conclusions for Construction Materials, products and designs. For all applicants construction site building materials, products, structures and equipment, an incoming inspection report must be drawn up and then signed by the responsible persons

14. A set of working drawings for the construction of the facility presented for acceptance, developed by design organizations, with inscriptions on the compliance of the work performed in kind with these drawings or changes made to them made by the persons responsible for the construction and installation work, agreed with the authors of the project.

15. Documents on approval of deviations from the project during construction

The set of acceptance documentation includes a package of permits:

Notice of the start of construction
Copy of the building permit
Copy of state examination of design documentation
Copy of industrial safety examination
A copy of the letter from Rostechnadzor “On approval of the industrial safety examination conclusion
A copy of the facility registration in Rostechnadzor
Order on the appointment of a person responsible for technical supervision
Copies of documents on testing the knowledge of the person responsible for technical supervision
Order on appointment of designer's supervision
Copies of documents on testing knowledge of architectural supervision
Installation organization information sheet
SRO of the installation organization
Order on the appointment of someone responsible for the construction of the facility
Copies of documents on testing the knowledge of the person responsible for the construction of the facility
Personnel certificates (welders, electrical personnel and so on.)
Certificate of certification of welding technology of the installation organization
Certificate of certification of welding equipment of the installation organization

Page 13 of 21

CONSTRUCTION PASSPORT FOR UNDERGROUND (ABOVEGROUND, GROUND) GAS PIPELINE, GAS INPUT

(cross out what is not necessary)

Built

(name of construction and installation organization

and project number)

by the address:

(city, street, start and end picket references)

1. Characteristics of the gas pipeline (gas inlet)

The length (for input - underground, ground or above-ground sections), diameter, operating pressure of the gas pipeline, pipe material, type of insulating coating of the linear part and welded joints (for steel underground gas pipelines and gas inputs), number of installed shut-off devices and other structures are indicated.


3. Data on welding gas pipeline joints
Last name, first name, patronymic of the welder	Type of welding	Welder number (stamp)	Welded joints		Date of welding work
			Pipe diameter, mm	Number, pcs.

(position, signature, initials, surname of the work producer)

It is allowed to attach a printout of the welding process of polyethylene pipes, issued by welding equipment.

An example of a plan (scheme) for welded joints of underground gas pipelines

Legend:

gas pipeline, completed construction;

existing gas pipeline;

a well with a valve on a gas pipeline;

water pipes;

rotary joint;

fixed joint;

joint tested by physical control methods;

joint; in the numerator - the serial number of the joint, in the denominator - the number (brand) of the welder who welded this joint;

two-story stone residential house, No. 25;

gas pipeline diameter; length of the gas pipeline section from joint to joint;

connecting the gas pipeline to structures

Note - The diagram should be drawn up so that the location of each joint can be found from the ground surface. To do this, references must be made to permanent ground objects (buildings, structures) of both the gas pipeline itself and its characteristic points (end, turning, etc.), the distances between joints must be plotted, as well as between joints and characteristic points, including intersecting communications. Strict adherence to the scale of the diagram is not necessary

4. Checking the depth of the underground gas pipeline, slopes, beds, installation of cases, wells, carpets

It was established that the depth of the gas pipeline from the surface of the earth to the top of the pipe along its entire length, the slopes of the gas pipeline, the bed under the pipes, as well as the installation of cases, wells, and carpets correspond to the design.

Work producer _____________________________________________

(position, signature, initials, surname)

5. Checking the quality of the protective coating of the gas pipeline (gas inlet)

1. Before laying in the trench, the protective coating was checked steel pipes and welded joints: for the absence of mechanical damage and cracks - by external inspection; thickness - measured according to GOST 9.602 ____ mm; adhesion to steel - according to GOST 9.602; continuity - with a flaw detector.

2. The protective coating of joints isolated in a trench was checked by external inspection for the absence of mechanical damage and cracks, according to GOST 9.602 (thickness, adhesion to steel, continuity).

3. Checking for the absence of electrical contact between the metal of the pipe and the pound was carried out after the trench was completely backfilled “__” ____________ 200 _ g.

If the trench was backfilled when the soil freezing depth was more than 10 cm, then the construction and installation organization must carry out an inspection after the soil has thawed, which must be recorded in the acceptance certificate for the completed construction of the gas supply system facility. When checking the quality of the protective coating, no defects were found.

Head of laboratory ___________________________________________

(signature, initials, surname)

Representative of the operating organization

(position, signature, initials, surname)

6. Purge the gas pipeline and test it for leaks

d. before the leak test, purging was carried out

gas pipeline with air. 2. " "

d. a gas pipeline backfilled to design levels with fittings installed on it and branches to objects up to shut-off devices (or the underground part of the gas inlet) is tested for leaks for _______ hours.

Before the start of the test, the underground (ground) gas pipeline was under air pressure for _______ hours to equalize the air temperature in the gas pipeline with the temperature of the pound.

Pressure measurements were made with a pressure gauge (differential pressure gauge) according to GOST

Data from pressure measurements when testing an underground (on-ground) gas pipeline

Date of testing	Pressure measurements, kPa (mm Hg)		Pressure drop, kPa (mm Hg)
	manometric	barometric	permissible	actual

According to the above pressure measurements, the underground gas pipeline passed the leak test; no leaks or defects were found in places accessible for inspection.

“__” _________ 200__ the above-ground gas pipeline (the above-ground part of the gas inlet) was tested for tightness by pressure ______ MP and held for ______ hours, followed by external inspection and checking of all welded, threaded and flanged connections. No leaks or defects were found. The above-ground gas pipeline (above-ground part of the gas inlet) passed the leak test.

Representative of the gas industry

(position, signature, initials, surname)

7. Conclusion

The gas pipeline (gas inlet) was built in accordance with the project developed by

(name of design organization, project release date)

taking into account the agreed changes made to the working drawings No. __ Construction started “__” __________ 200 _ Construction completed “__” _________ 200 _

Chief Engineer construction and installation organization Representative of the operating organization _____

(signature, initials, surname)

(position, signature, initials, surname)

CONSTRUCTION PASSPORT FOR IN-HOUSE (IN-SHOP) GAS USING EQUIPMENT

Mounted at: ____

(name of construction and installation organization and project number)

1. Characteristics of gas-using equipment

Indicated for indoor gas-using equipment: the number of apartments, the type and number of installed gas appliances, the total length of the gas pipeline and the number of shut-off devices on them; for in-shop equipment - total length of the gas pipeline, type and number of installed gas-using equipment, operating gas pressure __________________

2. List of attached certificates, technical passports (or copies thereof) and other documents certifying the quality of materials and equipment

Note - It is allowed to attach (or place in this section) extracts from these documents, certified by the person responsible for the construction of the facility, and containing the necessary information (certificate number, brand (type), GOST (TU), dimensions, batch number, plant manufacturer, date of manufacture, test results).

3. Data on welding gas pipeline joints

Last name, first name, patronymic of the welder (soldering operator)	(stamp) of a welder (soldering machine)	Welded joints		Date of welding work
	(stamp) of a welder (soldering machine)	Pipe diameter, mm	Number, pcs.	Date of welding work

(position, signature, initials, surnames of the work producer)

4. Gas pipeline leak testing

"___"__________200__ the gas pipeline was tested for tightness by pressure ______ MPa for _________ h, with connected gas-using equipment. The actual pressure drop _______ MPa is determined using a pressure gauge of accuracy class _______. No leaks or defects were found during an external inspection and checking all connections. The gas pipeline passed the leak test.

Work producer ______________________________________________

(position, signature, initials, surname)

Representative of the operating organization ___________

(position, signature, initials, surname)

5. Conclusion

Intra-house (intra-shop) gas-using equipment (including gas pipeline) was installed in accordance with the project developed

(name of the design organization and date of release of the project) taking into account the agreed changes made to working drawings No. ________________

Construction started "__" Construction completed "_

200 _ g. 200 g.

Chief engineer of the installation organization

(signature, initials, surname)

Representative of the operating organization

(position, signature, initials, surname)

Content

During the construction of power plants, petrochemical plants, main gas pipelines and other facilities with welded pipeline joints, standards require the preparation of working documentation. This is done for comprehensive control over the quality of work and the compliance of the constructed facility with design requirements.

An important tool for such control is the diagram of welded joints. It shows a schematic view of the facility’s pipelines, equipment, shut-off and control valves and connecting welds. Next to each connection is information related to it.

The as-built diagram is an integral element of the design and working documentation of water supply, heat supply, transport pipelines and technological installations with liquid or gaseous media. Performs out of scale and only gives general idea on the relative position of welds in space. Drawing in mandatory is tied to geodetic coordinates or to an object with known coordinates.

When forming a document, the order of the seams on a particular section of the pipeline is observed. The document is a guide to welding work, a planning and control tool. It is issued together with a summary table of joints, summarizing tabular form connection data. Except technical parameters seams, the personal data of the welders and the number of their personal mark are given.

Decor

The document is drawn up by the organization conducting installation work. It is compiled in production technical department on the basis of design and working documentation transferred to installers from the customer or directly from the designer, if this is provided for in the contract.

Based on the 3D model of the object presented by the designer, the technical department begins the formation of a weld pattern.

Simultaneously with drawing up the scheme, other related documents are also prepared:

summary table of joints;
acts of welders performing test welds and assigning them a personal mark;
certificates of welding work.

Without a complete set of documents, the facility cannot be accepted for operation

Signature

The layout of the welded joints of the pipeline must be certified by the signatures of the following officials:

foreman directly responsible for performing welding work at the site;
boss production and technical department;
Chief Engineer;
welders who performed the work, indicating the number of their personal mark.

The completed and certified document must be agreed upon with the design organization.

It is also necessary to coordinate with it all deviations from design parameters encountered as a result of monitoring, such as dimensions and slopes. A certified record of the absence of deviations or their agreement is made on the form. If there are many deviations, they can be agreed upon in a separate act. Then the document contains a link to the number and date of this document

Pivot table

The document is drawn up according to unified form P27.4, approved by Order of the Ministry of Energy No. 197. It must contain a complete list of seams welded on site.

The pivot table contains information about all connections of an object in a form convenient for control, generalization and analysis.

The following data is provided for each connection:

serial number,
the name of the node to which it belongs;
type of steel alloy from which the pipes are made;
their diameter and wall thickness;
quantity;
number corresponding to the designation on the Diagram.

If additional seams were welded at the site, their number and number are given in the additions column. This table allows you to determine the total number of joints, group them by diameter, wall thickness, and the need for non-destructive testing. This makes it easier to plan labor intensity, labor requirements consumables, as well as in instrumental quality control of connections.

Design rules

The pipeline welding diagram must contain the following information:

Object name;
pipeline class;
pipe parameters: alloy material, diameter and wall thickness;
transportable medium;
snapping to reference points.

Each joint on the diagram must have its own unique number. Sometimes continuous numbering of welded joints throughout the entire project is used, then the designation takes the form “E12.123”, where before the dot there is an object identifier, and after the actual joint number on a specific diagram.

The stage of forming a diagram of welded joints from a 3D model. The drawing is simplified, fittings and equipment are replaced with symbols.

In addition, the diagram may indicate the distance between adjacent joints and supporting objects, such as turns, reinforcement, supporting metal structures or technological equipment. This is mandatory in two cases:

the pipeline is covered with a layer of insulation;
the site runs underground or is hidden in the walls.

Designations, if necessary (for example, in case of an accident, scheduled repair or inspection) will help quickly and without extra costs and damage to structures, find the junction in case of repair, without resorting to additional documentation.

Joints in a schematic drawing can be of two types:

rotary;
non-rotating.

Rotary welds include welds made by a welder with a section of pipe rotated along the longitudinal axis at a certain angle. Usually this is an angle that is a multiple of 90 degrees. Such seams are welded in the “bottom” position. Such seams are of higher quality and more durable, since the work is carried out in a position convenient for welding. Analysis of statistical data shows that the frequency of detection of defects in such seams is significantly lower than in non-rotating ones. welded joints.

A fixed joint is welded without rotating the pipe to a convenient position. On the contrary, the welder has to follow the seam around the pipeline, including in disadvantageous positions: seams with a positive and negative slope, as well as vertical and ceiling ones. In this case, it is necessary to change the inclination of the electrode, its speed, welding current and other important operating modes several times.

In this case, the seam is welded in several stages, which negatively affects its strength and durability. Working in such conditions requires a worker with extensive experience and high qualifications.

Near each joint, the details of the welders who welded it are indicated (full name, personnel number or personal mark number).

The document also notes connections for which quality control will be required by non-destructive means (ultrasound, x-ray, etc.). For particularly important objects associated with high pressures and temperatures, aggressive environments and other factors, control is carried out for all joints.

The location diagram of welded joints indicates the joints at which non-destructive testing (ultrasonic, radiographic) is required. All joints are subject to visual inspection.

When drawing up a document, the same coordinate system is used as in other design and working documentation.

Important! The schema data and the summary table must match the Work Log data in the following parameters:

connection numbers;
pipe parameters;
Full name of welders and personal mark numbers
duration of work.

If the dimensions and slopes of the constructed object correspond to the design values, the inscription is written on the diagram: “There are no deviations from the design parameters.” Otherwise, a designer's inscription coordinating these deviations or a link to a separate document - an act of approval - is required.

The diagram is included in the object passport, is issued on high-quality media and using materials that guarantee long-term storage.

After completion of the work, all documentation is checked for completeness and correctness of execution and filling. After verification, the documents are handed over to the archive.

Designations of joints in the diagram

The joints in the diagram are designated in accordance with state standard GOST 2.312-72 “Conventional images and designations of seams of welded joints”, solid main line.

The following inscription is made in the form of a fraction on the take-out:

numerator - joint number;
denominator is the number of the welder’s personal mark.

A personal brand is issued for each welder separately. During certification, he welds a test seam that matches the material, diameter and thickness of the pipes with the actual connections on site. Such tests are carried out in special certification centers, the number of the personal mark is approved by order of the installation company.

Sample form

All forms are filled out in accordance with the requirements of the standard. Below is a welding form for the pipeline (sample) .

The document is at the final stage of formation. Contains the necessary joint data, corner stamp and Additional information. A summary table is visible above the stamp.

The diagram of welded joints is an important document that describes the relative position of the joints and their most important parameters. It is issued for any facility that has pipelines with welded seams. The diagram and the summary table compiled with it serve as a means of planning installation work, recording execution and quality control.

When preparing as-built documentation for welding, many are faced with the problem of how to properly prepare the documentation. The layout of welded joints is part of the welding documentation. Let's figure out how to correctly design the layout of welded joints?

The layout of welded joints is not to scale. Welded joints should be marked on the diagram. The distance between joints is indicated if the pipeline is subsequently insulated or underground. This is necessary to determine the location of the welded joint.

The joints in the diagram are indicated as rotary and non-rotary.

A rotary joint is a pipeline joint that is welded by rotating the pipe by 360˚, 180˚ or 90˚, and welding is usually performed in the lower position.

A rotary joint is easier to perform, since welding occurs in a comfortable position, which in turn indirectly affects the quality of welding. The likelihood of defects occurring is much less than when welding non-rotary joints.

A fixed joint is a pipeline joint, welding of which occurs without rotating the pipe, and the welder himself performs welding in various positions around the pipe.

A fixed joint is difficult to make. The main difficulty lies in the need to weld in different positions (bottom, vertical, ceiling seam). When welding in different positions, it is necessary to adjust the current strength. Welding a fixed joint requires high skill.

Before approval at the site, the welder must weld test and approval joints. The dimensions, design and position of the trial and acceptance joints must match the standard dimensions of production welded joints.

Also on the diagram of welded joints the number of the joint is indicated. The numerator indicates the serial number of the joint. The denominator indicates the personal mark of the welder.

The welder's mark is assigned upon passing certification at the NAKS certification center. To work at hazardous production facilities, a welder is assigned a brand by order of the enterprise, according to clause 8 of the Federal Tax Code.

The welder's mark is made in accordance with GOST 25726-83. On one side of the brand there is a mirrored alphabetic and numerical designation, on the other side there is a place for impact during branding.

Depending on the object on which welding is being carried out, the mark is located at a distance of 40mm - 60mm from the welded joint. When welding is performed by several welders, marks are placed at the boundaries of the joints.

Marking of welded joints is necessary to identify the welder who made the welded joint. If defects are detected in the welded joint, the contractor is determined by the applied mark and the issue of removing the welder from work and recertifying him, with passing practical and theoretical exams, is decided.

The diagram of the location of welded joints indicates the joints at which non-destructive testing (ultrasonic, radiographic) was performed. All joints are subject to visual inspection. For each hazardous production facility, the scope of control is determined according to the relevant regulatory documents.

A summary table of welded joints, carried out on the diagram, will allow you to determine the number of joints of different diameters and the required number of non-destructive testing.

The stamp for the location of welded joints is signed by the welding supervisor, the welders who performed the welding, and the installation supervisor.

The location diagram of welded joints indicates the name of the object, group or class of the pipeline, diameter and wall thickness of the pipeline, working environment, connections to fixed supports, buildings, fittings, etc.

Important!!! The layout of welded joints must correspond to the welding work log. (Numbering of joints, marks, diameters, wall thickness, welding sequence, as well as welders).

By Decree of December 23, 2002 No. 163 of the State Committee of the Russian Federation for Construction and Housing and Communal Services, this SNiP was canceled.

9.9. Underground gas pipelines of all pressures, as well as surface and internal gas pipelines of low and medium pressure, should be tested with air for strength and tightness. Aboveground and internal high-pressure gas pipelines should be tested with water for strength and tightness. They can be tested with air subject to special safety measures provided for by the work project.

9.10.* Strength testing of underground gas pipelines should be carried out after they are installed in a trench and sprinkled 20-25 cm above the upper forming pipe.

It is allowed to test gas pipelines for strength after the trenches are completely backfilled.

9.11. Testing underground gas pipelines for leaks should be carried out after the trench is completely backfilled to the design marks.

Before starting leakage tests, underground gas pipelines, after they have been filled with air, should be maintained under test pressure for the time necessary to equalize the air temperature in the gas pipeline with the ground temperature. The minimum duration of holding a gas pipeline under pressure, h, is set depending on the nominal diameter of the gas pipeline:

up to 300 mm................... 6

over 300 mm to 500 mm......... 12

" 500 " .................... 24

9.12. An underground gas pipeline is considered to have passed the leak test if the actual pressure drop during the test period does not exceed the value determined by the formula

		Allowable pressure drop, kPa;
		The same, mm Hg. Art.;
		Internal diameter of the gas pipeline, mm;
		Test duration, hours

the value of d is determined by the formula

		Internal diameters of gas pipeline sections, mm;
		Lengths of gas pipeline sections of corresponding diameters, m.

tightness is determined by the formula

where P(1) and P(2) are the excess pressure in the gas pipeline at the beginning and at the end of the test according to the pressure gauge, kPa (mm Hg);

B(1) and B(2) - the same according to barometer readings, kPa (mmHg, art.).

9.13.* Sections of underwater and underground passages laid in cases should be tested in three stages:

for strength - after welding the transition or part thereof before laying it in place;

for tightness - after laying in place, complete installation and backfilling of the entire transition;

for tightness - during the final tightness test of the entire gas pipeline as a whole.

Testing for strength and tightness of short single-pipe transitions, without welded joints, can be carried out together with the main gas pipeline.

9.14.* Before starting the leak test, external above-ground gas pipelines, as well as internal gas pipelines, including hydraulic fracturing and gas distribution pipelines after they are filled with air, should be kept under test pressure for the time necessary to equalize the air temperature inside the gas pipelines with the ambient air temperature.

9.15. Low pressure gas pipelines in residential buildings and public buildings, enterprises consumer services non-production population should be tested for strength and tightness in the following areas:

for strength - from the shut-off device at the entrance to the building to the taps on the descents to gas appliances. In this case, gas appliances should be turned off, and meters, if they are not designed for test pressure, should be replaced with jumpers;

for tightness - from the disconnecting device at the entrance to the building to the taps of gas appliances.

When installing additional gas appliances in existing gasified residential and public buildings, testing of new sections of gas pipelines to these appliances with a length of up to 5 m can be carried out with gas (working pressure) after connecting the new sections to the existing network, checking all connections with gas indicators or soap emulsion.

Internal gas pipelines of industrial and agricultural enterprises, boiler houses, consumer services enterprises of a production nature should be tested in the area from the disconnecting device at the input to the disconnecting devices at the gas burners of the equipment being gasified.

Testing of gas pipelines and hydraulic fracturing and gas distribution equipment should be carried out either as a whole (from inlet to outlet valve) according to test pressure standards on the high pressure side, or in parts: up to the pressure regulator - according to test pressure standards on the high pressure side; after the pressure regulator - according to the test pressure standards on the low pressure side.

9.16. When testing the tightness of internal gas pipelines, the average is over 0.1 MPa (1 kgf/sq.cm) and high pressure at industrial and agricultural enterprises, boiler houses, public service enterprises of a production nature, permissible

pressure should be determined by the formula

where d is the internal diameter of the gas pipeline being tested, mm.

If the tested gas pipeline consists of sections of gas pipelines of different diameters, then the value of d in formula (4) should be determined using formula (2).

The actual pressure drop in the gas pipeline, expressed as a percentage of the initial pressure, should be determined by the formula

where P(1), P(2), B(1), B(2) - the same as in formula (3);

t(1) and t(2) - absolute air temperature in the gas pipeline at the beginning and at the end of the test, °C.

9.17. If gasified thermal units have automatic devices, strength testing of gas pipelines should be carried out up to the shut-off device installed on the branch from the general (shop) gas pipeline to this unit. Automation devices should only be tested for tightness by operating pressure together with the gas pipeline.

9.18. Internal low-pressure gas pipelines from individual, group cylinder and tank LPG installations in residential and public buildings should be tested for strength and tightness according to gas pipeline testing standards natural gas in accordance with table. 3*.

9.19.* LPG tanks together with piping in the liquid and vapor phases should be tested for strength and tightness in accordance with the requirements of the “Rules for Construction and safe operation vessels operating under pressure" Gosgortekhnadzor of the Russian Federation.

9.20.* Acceptance of a completed gas supply system facility should be carried out in accordance with mandatory appendices 8*, 9*.

ANNEX 1*

Mandatory

CONSTRUCTION PASSPORT UNDERGROUND

(OVERGROUND) GAS PIPELINE, GAS INLET,

(cross out what is not necessary)

built by __________________________________

Organizations

______

and project number)

______

(city, street, start and end picket references)

1. Characteristics of the gas pipeline (gas inlet)

The length (for underground and above-ground sections), diameter, operating pressure of the gas pipeline, type of insulating coating of the linear part and welded joints (for underground gas pipelines and gas inlets), the number of installed shut-off devices and other structures are indicated.

(or their copies) and other documents certifying

quality of materials and equipment

_________

__________________________

Name Patronymic name		Welded joints	the date of the
welder	welder		welding work

____________________________________________________________________________________

An example of a plan (diagram) of welded joints

underground gas pipelines

Note. The diagram must be drawn up so that the location of each joint can be found from the surface of the earth. To do this, references must be made to permanent ground objects (buildings, structures) of both the gas pipeline itself and its characteristic points (ends, turning points, etc.); The distances between joints, as well as between joints and characteristic points, including intersecting communications, must be marked. Strict adherence to the scale of the diagram is not necessary.

4. Checking the depth of the gas pipeline,

slopes, beds, installation of cases, wells, carpets

(compiled for underground gas pipelines and gas inlets)

_______

Representative

_______

(position, signature, initials, surname)

5. Checking the quality of the protective coating

underground gas pipeline (gas inlet)

1.* Before laying in the trench, the protective coating of pipes and joints was checked:

for the absence of mechanical damage and cracks - by external inspection; thickness - measured according to GOST 9.602-89 __ mm; adhesion to steel - according to GOST 9.602-89; continuity - with a flaw detector.

2.* Joints isolated in a trench are checked by external inspection for the absence of mechanical damage and cracks.

Position 3 should be excluded.

4.* A check for the absence of electrical contact between the metal of the pipe and the ground was carried out after the trench was completely backfilled “___” __________ 19 ___.

Note. * If the trench was backfilled when the soil freezing depth was more than 10 cm, then the construction and installation organization must carry out an inspection after the soil has thawed, which must be recorded in the acceptance certificate for the completed construction of the gas supply system facility.

When checking the quality of the protective coating, no defects were found.

(signature, initials, surname)

Representative

(position, signature, initials, surname)

6. Purge of the gas pipeline,

testing it for strength and tightness

Position 1 should be excluded.

2. “___” __________ 19__ before the strength test, the gas pipeline was purged with air.

3.* “___” __________ 19__, a pneumatic (hydraulic) test of the gas pipeline was carried out for strength by pressure ____ MPa (________ kgf/sq. cm) with exposure for ___ hours.

The gas pipeline passed the strength test.

4. “___” __________ 19__, a gas pipeline backfilled to design levels with fittings installed on it and branches to objects up to shut-off devices (or the underground part of the gas inlet) was tested for tightness for ___ hours.

Before the start of the test, the underground gas pipeline was under air pressure for ___ hours to equalize the air temperature in the gas pipeline with the ground temperature.

Pressure measurements were made with a pressure gauge (differential pressure gauge) according to GOST _____, class ______.

Data from pressure measurements during underground testing

gas pipeline

Date of testing

Pressure measurements, kPa (mm Hg)

Pressure drop, kPa

(mmHg.)

manometric

barometric

According to the above pressure measurements, the underground gas pipeline passed the leak test, no leaks or defects were found in places accessible for inspection;

“___” __________ 19__ the above-ground gas pipeline (above-ground part of the gas inlet) was tested for tightness by pressure ___ MPa (______ kgf/sq.cm) with holding for ___ hours, followed by external inspection and checking of all welded, threaded and flanged connections. No leaks or defects were found. The above-ground gas pipeline (above-ground part of the gas inlet) passed the leak test.

Work producer _________________________________________________________________

(position, signature, initials, surname)

Representative

gas industry ______________________________________________________________

(position, signature, initials, surname)

7. Conclusion

The gas pipeline (gas inlet) was built in accordance with the project developed by

______________________________________________________________________________

(name of design organization

______________________________________________________________________________

and project release date)

taking into account the agreed changes made to working drawings No. __-_____

Construction completed "___" ___________ 19__

Chief Engineer of SSMU ________________________________

(signature, initials, surname)

Representative

gas industry ______________________________________________

(position, signature, initials, surname)

APPENDIX 2

Mandatory

CONSTRUCTION PASSPORT IN-HOUSE

(IN-SHOP) GAS EQUIPMENT,

mounted _____________________________________________________________________

(name of construction and installation

____________________________________________________________________________________

organization and project number)

1. Characteristics of gas equipment

Indicated for indoor gas equipment - the number of apartments, the type and number of installed gas appliances, the total length of the gas pipeline and the number of shut-off devices on them; for in-shop equipment - total length of the gas pipeline, type and number of installed gas equipment, operating gas pressure________

______________________________________________________________________________

Technical data sheets

(or copies thereof) and other documents,

certifying the quality of materials

and equipment

______________________________________________________________________________

Note. It is allowed to attach (or place in this section) extracts from these documents, certified by the person responsible for the construction of the facility, and containing the necessary information (certificate number, brand (type), GOST (TU), dimensions, batch number, manufacturer, date release, test results).

3. Data on welding gas pipeline joints

Full Name	Number (stamp)	Welded joints	the date of the
welder	welder	pipe diameter, mm	welding work

____________________________________________________________________________________

(position, signature, initials, surname of the work producer)

4. Testing the gas pipeline for strength and tightness*

Position 1 should be excluded.

2.* “____” __________ 19__ the gas pipeline was tested for strength by air pressure ___ MPa (_____ kgf/sq. cm) for 1 hour in the section from the disconnecting device at the inlet to the taps on the lowers to the equipment (devices). The gas pipeline passed the strength test.

3.* “___” ________ 19__ the gas pipeline was tested for tightness by pressure _____ MPa (_____ kgf/sq.cm) for ___ hours with gas appliances connected. The actual pressure drop is ____ MPa (______ kgf/sq.cm) with an allowable drop of ______ MPa (_______ kgf/sq.cm). No leaks or defects were found during an external inspection and checking all connections. The gas pipeline passed the leak test.

Work producer _________________________________________________________________

(position, signature, initials, surname)

Representative

gas industry _________________________________________________________________

(position, signature, initials, surname)

5. Conclusion

Intra-house (intra-shop) gas equipment (including gas pipeline) was installed in accordance with the project developed

______________________________________________________________________________

taking into account the agreed changes made to working drawings No._____

Construction started "___" __________ 19__

Chief Engineer of SSMU ______________________________________________________________

(signature, initials, surname)

Representative

gas industry ______________________________________________________________

(position, signature, initials, surname)

Note. If a workshop (boiler room) has a gas distribution unit installed in a common room of the workshop and serving only this workshop, then it is allowed to draw up a common construction passport for the intra-shop gas pipeline and gas distribution unit. In this case, the following changes must be made to the above passport form:

a) in section 1 characteristics of the gas equipment of the workshop should be given in the following form:

Total length of gas pipeline

Gas pressure, MPa

(kgf/sq.cm)

GRU equipment

(type, size)

Gasified equipment (furnaces, boilers, appliances), pcs.

at the input, P(max)

at the outlet from the hydraulic fracturing, (working) Р(ser)

pressure regulator

shut-off valve

safety relief valve

b) in section. 2, 3, 4 it is necessary to take into account the GRU;

c) supplement the passport with the section “Testing the GRU for strength and tightness”;

d) in the “Conclusion” instead of the words “(including gas pipeline)” you should write: “(including gas pipeline and GRU)”.

APPENDIX 3

Mandatory

CONSTRUCTION PASSPORT OF GRP,

built by ___________________________________________________________________

(name of construction and installation

______________________________________________________________________________

organization, project number)

by the address: _____________________________________________________________________

1. Characteristics of hydraulic fracturing

Gas pressure (inlet and outlet), type and dimensions are indicated installed equipment, number and area of premises, heating and ventilation system, data on lighting, communications, telecontrol.

______________________________________________________________________________

2. List of attached certificates,

_____________________________________________________________________________________

3*. Data on welding gas pipeline joints

		Welded joints		the date of the
welder's middle name	welder	pipe diameter, mm	welding work

____________________________________________________________________________________

(position, signature, initials, surname of the work producer)

4. Testing of gas pipeline and hydraulic fracturing equipment

for strength and tightness

1. “___” ___________ 19__ the gas pipeline and hydraulic fracturing equipment were tested for strength by pressure of ___ MPa (____ kgf/sq.cm) with exposure for 1 hour. The gas pipeline and hydraulic fracturing equipment passed the strength test.

2. “___” __________ 19__ gas pipelines and hydraulic fracturing equipment were tested for tightness by pressure ___ MPa (___ kgf/sq.cm) for ___ hours.

Pressure drop ___ MPa (___ kgf/sq.cm) with an allowable pressure drop ___ MPa (___ kgf/sq.cm).

No leaks or defects were found during an external inspection and checking all connections. The gas pipeline and hydraulic fracturing equipment passed the leak test.

Work producer __________________________________________________________

(position, signature, initials, surname)

Representative

gas industry _________________________________________________________________

(position, signature, initials, surname)

Note. If testing of gas pipelines and hydraulic fracturing equipment for strength and tightness is carried out separately for the high and low pressure sides, then two entries should be made in this section of the passport - one for testing for high side, the other is on low.

5. Conclusion

The hydraulic fracturing station was built in accordance with the design developed by ___________________________

______________________________________________________________________________

(name of the design organization and date of release of the project)

taking into account the agreed design changes made to working drawings No. ____________

Construction of the hydraulic fracturing station began “___” ___________ 19__.

Construction of the hydraulic fracturing station was completed “___” __________ 19__.

Chief Engineer of SSMU ________________________________________________

(signature, initials, surname)

Representative

gas industry _________________________________________________

(position, signature, initials, surname)

Note. This form can be used for construction passports of evaporative and group cylinder LPG installations, if they are located in a separate building (room).

APPENDIX 4

Mandatory

CONSTRUCTION PASSPORT

LPG TANK INSTALLATION,

built and installed ___________________________________________________

(name of construction

______________________________________________________________________________

installation organization, project number)

by the address: _____________________________________________________________________

1. Installation characteristics

The type, number, manufacturers and serial numbers of tanks, evaporators and valve heads are indicated; registration numbers and type of protective coating of tanks and evaporators, capacity of each tank, capacity of each evaporator, type and number of pressure regulators of valve heads

______________________________________________________________________________

2. List of attached certificates,

technical passports (or their copies) and other documents,

certifying the quality of materials and equipment

______________________________________________________________________________

3*. Data on welding joints of tank piping pipes

Name Patronymic name	Number (stamp)	Welded joints	the date of the
welder	welder	pipe diameter, mm	welding work

___________________________________________________________

(position, signature, initials, surname of the work producer)

4. Acceptance of hidden work during installation of a tank installation

The foundations have been laid ____________________________________________________________

(in accordance with the project, with deviations

______________________________________________________________________________

from the project, indicate deviations and their justification)

The bases and foundations of tanks and evaporators comply with the requirements of SNiP 3.02.01-87 and the project.

Work producer _________________________________________________________________

(position, signature, initials, surname)

Representative

gas industry ______________________________________________________________

(position, signature, initials, surname)

5.* Checking the quality of protective coating of tanks,

evaporators and piping

1. Before lowering the LPG tank into the pit, the quality of the protective coating was checked:

absence of mechanical damage and cracks - by external inspection;

thickness - measured according to GOST 9.602-89 ___ mm;

adhesion to steel according to GOST 9.602-89;

continuity - with a flaw detector.

2. The joints of the strapping, isolated in the trench, are checked by external inspection for the absence of mechanical damage and cracks.

Head of laboratory ________________________________________________________

(signature, initials, surname)

Representative

gas industry __________________________________________________________

(position, signature, initials, surname)

6. Checking the tank grounding circuit

The grounding circuit of tanks and evaporators corresponds to the design. The resistance when tested is ____ Ohm.

The inspection was carried out by a representative of the laboratory

____________________________________________________________

(name of organization, position, signature, initials, surname)

"____" ____________ 19___

7. Testing the tank installation for strength and tightness

Position 1 should be excluded.

2. “___” __________ 19__ the tank installation was tested for strength by pressure ___ MPa (___kgf/sq.cm) with exposure for 1 hour. The tank installation passed the strength test.

3. “___” ___________ 19__ tank installation, consisting of tanks, evaporators with installed equipment and piping, was subjected to a leak test with pressure ___ MPa (___ kgf/sq.cm).

Flange, welded and threaded connections, as well as tank head fittings, LPG evaporators, shut-off devices and piping pipelines have been checked.

No leaks or defects were found during inspection.

The tank installation passed the leak test.

Work producer ______________________________________________________________

(position, signature, initials, surname)

Representative

gas industry ______________________________________________________________

(position, signature, initials, surname)

Note. If the strength and tightness test of tanks and evaporators with installed equipment and their piping pipelines is carried out separately for the high and low pressure sides, then two entries should be made in this section of the passport: one for testing on the high side, the other for the low side.

8. Conclusion

The LPG tank installation was installed in accordance with the design developed by

____________________________________________________________________________

(name of company)

taking into account the agreed design changes made to working drawings No. ______.

Construction started "___" ___________ 19__

Construction completed "___" __________ 19__

Chief Engineer of SSMU _____________________________________________________

(signature, initials, surname)

Representative

gas industry _____________________________________________________

(position, signature, initials, surname)

APPENDIX 5*

Mandatory

(name of construction

_______________________________________

installation organization)

PROTOCOL

BY RADIOGRAPHIC METHOD

No. _______ "___" ___________ 19__

The welded joints of the _______ pressure gas pipeline being built at

____________________________________________________________________________

The gas pipeline is welded _____________________ by welding from pipes with an outer diameter of _________ mm,

(type of welding)

wall thickness _______________ mm.

Test results

	welder's first name and patronymic	Welder number (stamp)	Image number	Image size, mm	Control sensitivity, mm	Defects found

Head of laboratory ____________________________________________________

(signature, initials, surname)

Flaw detector _____________________________________________________

(signature, initials, surname)

APPENDIX 6*

Mandatory

Laboratory ____________________________

(name of construction

_______________________________________

installation organization)

PROTOCOL

MECHANICAL TESTING OF WELDED JOINTS

STEEL (POLYETHYLENE) GAS PIPELINE

No. _______ "____" ___________ 19___

The joints of a steel (polyethylene) gas pipeline were tested,

welded _____________ from pipes according to GOST (TU) ___________, steel grade

(type of welding)

outer diameter ___________ mm, wall thickness _______ mm by welder

Having the number (stamp) _______,

(Full Name)

by the address:

_______________________________________________________________________

(street, start and end picket references)

from “___” ____________ 19___ to “____” ___________ 19__

Results of mechanical tests of welded joints

steel gas pipeline

	Sample sizes			Test results
samples	before testing			tensile			for flattening		junction (pass, fail)
	thickness (diameter), mm	width Length),	cross-sectional area,	breaking load,	tensile strength, MPa	Location of failure (along the seam or base metal)	clearance between the surfaces of the press when the first crack appears, mm	bending angle, degrees

Mechanical test results

welded joints of polyethylene gas pipeline

Joint number

Number and type of sample cut from the joint

Type of tensile testing machine

Tensile yield strength, MPa

(kgf/sq.cm)

Elongation at fracture, %

Nature and type of destruction

Joint assessment (pass, fail)

Head of laboratory ________________________________________________________

(signature, initials, surname)

Tests were carried out by ________________________________________________________________

(signature, initials, surname)

Note. The test report should be drawn up for each welder separately and a copy should be submitted as part of the as-built documentation for all facilities where this welder worked during the calendar month.

APPENDIX 7*

Mandatory

Laboratory ____________________________

(name of construction

_______________________________________

installation organization)

PROTOCOL

CHECKS OF GAS PIPELINE WELD JOINTS

ULTRASONIC METHOD

No. ______ "___" ________ 19__

The welded joints of the gas pipeline _______ pressure were checked,

being built at the address_________________________________________________.

(street, start and end picket references)

The gas pipeline is welded ____________ by welding from pipes with an outer diameter

(type of welding)

Mm, pipe wall thickness _________ mm.

Quality control of welded joints is carried out using ultrasonic

flaw detector type _____, operating frequency ______ MHz.

Test results

Joint number according to the welding diagram	Last name, first name, patronymic of the welder	Welder number (stamp)	Beam entry angle, degrees.	Rejection sensitivity	Description of defects	Joint assessment (pass, fail)

Head of laboratory ________________________________________________________

(signature, initials, surname)

Flaw detector ______________________________________________________________

(signature, initials, surname)

APPENDIX 8*

Mandatory

ACCEPTANCE RULES

COMPLETED CONSTRUCTION FACILITIES

GAS SUPPLY SYSTEMS

1. Acceptance of a completed gas supply system facility, built in accordance with the design and requirements of SNiP 3.05.02-88*, must be carried out by the acceptance committee in accordance with the requirements of these Rules.

Note. These rules do not apply to completed construction of GNS, GNP and gas filling stations, the acceptance of which should be carried out in accordance with the requirements of SNiP 3.01.04-87.

2. The acceptance committee includes representatives of: the customer (chairman of the commission), the general contractor and the operating organization (gas utility or gas service of the enterprise). Representatives of Gosgortekhnadzor bodies Russian Federation are included in the acceptance committee when accepting objects controlled by these bodies.

3. The general contractor for each completed construction of a gas supply system object shall present the following as-built documentation to the acceptance commission in one copy:

a set of working drawings for the construction of an object presented for acceptance with inscriptions made by persons responsible for the construction and installation work on the compliance of the work performed in kind with these drawings or included in them design organization changes;

certificates of manufacturers (their copies, extracts from them, certified by the person responsible for the construction of the facility) for pipes, fittings, welding and insulating materials;

technical passports of manufacturers (TsZZ, TsZM) or their copies for equipment, components, connecting parts, insulating coatings, insulating flanges, fittings with a diameter of over 100 mm, as well as other documents certifying the quality of equipment (products);

manufacturer's instructions for operating gas equipment and appliances;

construction passport and quality control protocols for welded joints according to SNiP 3.05.02-88* forms;

act of laying out and transferring the route (site) for the underground gas pipeline and LPG tanks;

work log book (for underground gas pipelines over 100 m long and LPG tanks) - at the customer’s request;

acceptance certificate for electrochemical protection installations provided for by the project (for underground gas pipelines and LPG tanks);

acts of acceptance of hidden and special works, performed in accordance with the contract (contract) - for hydraulic fracturing, boiler houses;

act of acceptance of gas equipment for comprehensive testing (for enterprises and boiler houses).

4. The acceptance committee must check the submitted as-built documentation and the compliance of the installed gas supply system with this documentation, the requirements of SNiP 3.05.02-88* and the “Safety Rules in the Gas Industry” of the State Technical Supervision Authority of the Russian Federation.

5. Acceptance of a gas supply system facility completed by construction is formalized by an act in the form of mandatory Appendix 9*.

APPENDIX 9*

Mandatory

acceptance of a completed construction project

gas supply systems

___________________________________________________________

(name and address of the object)

_________________ "__"____________19__

Acceptance committee consisting of: chairman of the committee - representative of the customer

_________________________________,

commission members, representatives:

general contractor __________________________________________________________,

(last name, first name, patronymic, position)

operating organization ___________________________________________________,

(last name, first name, patronymic, position)

bodies of the State Mining and Technical Supervision of the Russian Federation _____________________________________________________

(last name, first name, patronymic, position)

INSTALLED:

1. General contractor ___________________________________________________

(name of company)

completed construction presented for acceptance _________________________________

(Object name)

2. Subcontractors ______________________________________________

(name of company)

completed _____________________________________________________________________

(types of jobs)

3. Project N____ was developed by ___________________________________________________

(name of company)

4. Construction was carried out within the following terms:

start of work ___________________, completion of work __________________.

(month, year) (month, year)

The acceptance committee reviewed the documentation submitted in accordance with the requirements of the “Rules for Acceptance of Completed Construction of Gas Supply System Facilities” and the “Safety Rules in the Gas Industry” of the Gosgorgekhnadzor of the Russian Federation, carried out an external inspection of the facility, determined the compliance of the construction and installation work performed with the project, and, if necessary, carried out additional tests (except for those recorded in the as-built documentation).

_______________________________________________________________________________

(types of tests)

Decision of the acceptance committee:

1. Construction and installation work was completed in full in accordance with the project, the requirements of SNiP 3.05.02-88* and the “Safety Rules in the Gas Industry” of the State Technical Supervision Authority of the Russian Federation.

2. Presented for acceptance ___________________________________________________ shall be considered

(Object name)

accepted by the customer along with the attached as-built documentation from “___”___________19__.

Chairman of the commission ______________________________________________________________

(signature)

Representative of the General

contractor

(signature)

Operations representative

organizations

(signature)

Representative of the authorities

Gosgortekhnadzor of the Russian Federation

________________

(signature)

The text of the document is verified according to:

official publication

Ministry of Construction of Russia - M: GP TsPP,