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The incoming inspection of pipes should include all types of checks, including flaw detection, to confirm their compliance with the requirements of standards and specifications. Transportation, preparation and inspection of casing pipes must be carried out in accordance with the requirements of the manufacturer.

Incoming control of pipes is carried out for their compliance technical requirements set out in the regulatory and technical documentation for pipes.

The input control of pipes and fittings of foreign supply is also carried out in accordance with the above provisions.

Pipe incoming inspection areas are specialized organizational units and are not subordinate to shops that produce marketable products. The main task of the sites is to check the continuity of pipes, steel grade, grain size and reject defective pipes as much as possible.

During the incoming inspection, pipes and materials must be checked for the absence of defects and deterioration in their quality caused by violations of the established rules for their storage and transportation. During operational control, it is necessary to check the correctness of the preparation of pipes and their assembly for welding, as well as to control the technological parameters of the welding process and the quality of the weld. It is necessary to control the correctness of the geometry of the groove of the welded pipe edges, the size of the gaps in the joints and the displacement of the welded edges. When using preheating, it is necessary to control the temperature of the heat-affected sections of pipes before and during welding, and in electric contact welding, check the presence and quality of cleaning of the pipe surface under the contact shoes of the welding machine.

The enterprise must carry out incoming inspection of pipes, forgings, parts of welded joints and welding consumables for their compliance with the requirements of these Rules, standards, specifications and design documentation.

The enterprise must carry out incoming inspection of pipes, forgings, parts of welded joints and welding consumables for their compliance with the requirements of these Rules, standards, specifications and design documentation.

An analysis of the accident rate for new tubing (with a service life of up to 5 years) showed that due to the lack of pressure testing during the input inspection of pipes, an additional 3% of unnecessary repairs from the total number of PRS occur. Corrosion destruction is typical for tubing of all plants. Pipes of the Nizhnednepropetrovsk pipe-rolling plant are most susceptible to corrosion, followed by Japanese and Austrian pipes. The deviation of the geometrical parameters of the thread leads to its erosion on the pipes. The percentage of such defects is high in the pipes of the Sumgait, then Nizhnednepropetrovsk, Rustavi, Kamensk-Ural plants. It should be noted high quality threaded connections of imported pipes.

An analysis of the accident rate for new tubing (with a service life of up to 5 years) showed that due to the lack of pressure testing during the input inspection of pipes, an additional 3% of unnecessary repairs from the total number of PRS occur. Corrosion destruction is typical for tubing of all plants. Pipes of the Nizhnednepropetrovsk pipe-rolling plant are most susceptible to corrosion, followed by Japanese and Austrian pipes. The deviation of the geometrical parameters of the thread leads to its erosion on the pipes. The percentage of such defects is high in the pipes of the Sumgait, Nizhnednepropetrovsk, Rustavi, Kamensk-Ural plants. It should be noted the high quality of threaded connections of imported pipes.

7.1 Pipe products supplied to construction sites are subject to incoming control, carried out in two stages, which includes survey and rejection (for pipe products subject to technical supervision in accordance with RD-03.100.50-KTN-122-13).

7.2 The first stage of incoming control is carried out by the customer's representative during the unloading of products at the destination. By the decision of the customer, the first stage of incoming control is carried out jointly with a representative of the customer's construction control. The involvement of specialists from the building control body of the customer at the first stage of incoming control is carried out on a separate application.

7.3 During the implementation of the first stage of input control, the following is performed:

Checking incoming products for compliance with technical requirements, working documentation, quality certificates (or declarations of conformity);

Checking the presence of markings according to requirements normative documents, as well as their compliance with the data specified in the passports and certificates;

Verification of serial numbers of products with technical supervision data for products that have been accepted by the customer’s technical supervision representative at the manufacturing plant and shipped to the customer’s address (only for supervised products supplied by third-party organizations (not OST) that repackage MT during work (not included to the OST Development Program) for the reconstruction railway tracks, roads and other communications, and having direct contracts with Transneft Nadzor LLC for construction control and technical supervision services);

Checking the availability of originals (or duly certified copies) of passports and certificates (or declarations of conformity) certifying the compliance of products with the specifications for delivery;

Checking the presence in passports and certificates (or declarations of conformity) of a mark on the acceptance of products by the technical supervision of the customer at the manufacturer's plant;

Inspection of products for shipping damage.

7.4 Based on the results of the first stage of the input control, an input control report is drawn up in the form of Appendix A OR-03.100.50-KTN-120-10. If a decision is made on non-conformity of products, claim work is carried out in accordance with contractual obligations.

7.5 The second stage of control is carried out on a commission basis with the participation of representatives of the work foreman, the quality control service of the contractor, the Customer and the Customer’s construction control and in accordance with technological maps input control, which are part of the agreed and approved WEP, after unloading at the construction site (storage site) using instrumental control tools. The results of the second stage of the input control of the MTR are drawn up by the Act in the form 3.3 VSN 012-88.

7.6 When performing work on the incoming inspection of connecting parts and stop valves, as well as at the second stage of incoming inspection of tubular products, the following is carried out:

1) survey of pipes and pipeline parts:

For the absence of unacceptable mechanical damage, metallurgical defects and corrosion, including delaminations that go to the edge and surface of products, nicks, scratches, dents on the body and on the ends;

On the value of deviations of the pipe diameter and wall thickness from the nominal dimensions;

For the compliance of the deviations of the chamfer angle, the oblique cut of the ends, the ovality of the ends, the curvature of the pipes and the removal of the reinforcement of the internal seam with the requirements of the current norms and rules;

The thickness of the pipe wall and the thickness of the factory insulation;

To the width of the uninsulated part of the pipe edge;

The angle of cutting the edges of the pipe and factory insulation;

For the availability of accompanying documentation and the completeness of the data provided in it; the presence of the technical specifications of the manufacturer of the products and the compliance of the supplied materials with these technical specifications;

For the presence of marking and its compliance with passport data and the manufacturer's specifications;

For the absence of unacceptable surface defects welds;

2) control over the repair of pipes with permissible surface defects, according to a technology that meets the requirements of the current rules and regulations, with the execution of acts of the established form;

3) control of the state of shut-off valves (gate valves), check valves, safety and control valves, pumping equipment;

4) control of the correct storage of pipes, pipeline parts, fittings and equipment;

5) checking the availability of originals (or duly certified copies) of certificates (or declarations of conformity) and passports, their compliance with incoming materials, products and equipment (including compliance with the equivalent carbon content design solutions);

6) measurement parameters:

Pipe ends, parts (diameter, ovality, wall thickness, dents);

Outer diameter of the body of pipes, parts;

Deviations of wall thickness at the ends;

Pipe edge parameters, details;

pipe curvature;

Kosina cut ends of pipes, parts;

The quality of the surface and welds of pipes;

Ultrasonic thickness measurement of pipe walls;

7) Bending quality control:

Checking the absence of defects in the stretched part of the seam;

Control of places of deformations of cold bend bends

Checking the ovality of the ends of the bends and the curved part

7.7 Methods and scope of control.

1) Visual and measuring control:

Visual 100% of all pipes, fittings and valves,

Instrumental in the amount of 5% selectively, plus products (pipes, parts), ultrasonic pipe wall thickness measurement in the amount of 5% selectively, if one pipe with unacceptable parameters is detected - 100% control of the entire batch of pipes.

2) For pipes with a factory insulating coating, the following is additionally carried out:

Continuity control of the factory insulating coating (continuity check - 5% of pipes, if a defect is detected, the scope of the check is doubled, if a defect is detected again - the entire batch is rejected);

Measurement of the thickness of the insulating coating (electromagnetic (magnetic) thickness measurement of the insulating coating in the amount of 5% selectively, upon detection of one pipe with unacceptable coating parameters according to appearance– 100% batch control).

3) For pipes with a factory heat-insulating coating, the following is additionally carried out:

Control of the thickness of the thermal insulation coating;

Control of the integrity of the thermal insulation coating.

7.8 Timing of the SC.

7.8.1 The performer of the work shall, in time sufficient for the mobilization of the SC specialists, but not less than 1 day in advance, notify the deadlines for completing the work and presenting them for examination. Notification of the IC body of the need to carry out control measures for the acceptance of work performed, if it is necessary to present works that require specialized control and measuring equipment, is made 3 working days in advance.

7.8.2 Deadlines for carrying out routine maintenance for the implementation of construction control during the incoming inspection of pipes, valves, shaped products, equipment and materials during the construction of the linear part of the MN and MNPP should be calculated based on the volume of construction and installation work performed, taking into account 100% visual and 5% instrumental control, but should not exceed 1 working day after the work is presented for control / examination by the construction contractor.

7.8.3 Completeness control executive documentation carried out by the SC personnel on a daily basis upon completion of the relevant work at the facility.

7.8.4 Routine work on the implementation of construction control during the incoming inspection of pipes, valves, fittings, equipment and materials during the construction of the linear part of MN and MNPP are given in Table 2.

Table 2 - Routine work on the implementation of construction control during the input control of pipes, valves, fittings, equipment and materials.

stage number	Name of works or technological stages	Object, control parameters			A document confirming the completion of the stage and the control performed	IC document based on the results of the performed control
7.1	Carrying out routine work on incoming control at the first stage (carried out for pipe products subject to technical supervision in accordance with RD-03.100.50-KTN-122-13). Control accompanying documents for valves, fittings, equipment and materials.
7.1.1	Control of the completeness of passports, certificates (or declarations of conformity) of the manufacturer.	The control parameters are determined by RD-93.010.00-KTN-011-15, OR-03.100.50-KTN-120-10, PD and PPR: 1. Compliance of the delivered equipment with the project requirements for strength, operational characteristics, climatic design and operating conditions. 2. Availability of originals (or duly certified copies) of certificates (or declarations of conformity) certifying the compliance of shut-off valves, fittings with specifications for delivery with an acceptance stamp. 3. Checking the availability of accompanying documentation for spherical bottoms (passports, certificates (or declarations of conformity), specifications): original documents or duly certified copies must be submitted; 4. The presence of markings in accordance with the requirements of regulatory documents. 5. Availability of a passport with signatures and seals of representatives of the QCD and SC.	Constantly. 100% for each document.		1. Entries in the "Journal of input control". 2. Warnings and instructions. 3. Journal of comments and suggestions. 4.Journal of the customer's IC. 5. Journal of the IC contractor.
7.1.2	Preparatory work before the start of loading and unloading operations.	Control parameters are determined by OR-03.100.50-KTN-120-10, VSN 008-88, Order of Rostekhnadzor 533 dated 11/12/2013, Order 533 dated 11/12/2013, PD and PPR: 1. Preparation of incoming control zones and areas for storing products . 2. Preparation of access roads to and between sites. 3. Ensuring lighting of work places. 4. Laying pipes, shut-off valves, fittings on inventory linings with stops at storage sites. 5. Placement of the necessary lifting mechanisms, compliance of rigging equipment, inventory, tools with design ones. 6. Appointment of persons responsible for the performance of work, labor protection and safe operation cranes.	Visual -100%		1. Journal of input control. 2. Warnings and instructions. 3. Journal of comments and suggestions. 4. Journal of the customer's IC. 5. Journal of the IC contractor.	Permission to unload pipes, fittings, fittings and store them.**
7.1.3	Unloading and storage of pipes, valves, fittings, equipment and materials.	The control parameters are determined by OR-03.100.50-KTN-120-10, VSN 008-88, Order of Rostekhnadzor 533 dated 11/12/2013, OR-03.100.50-KTN-120-10, PD and PPR: 1. Unloading pipes, shut-off fittings, fittings using grips equipped with liners and linings. 2. Compliance of the storage site with the requirements. 3. Storage of pipes.	Visual -100%. Instrumental - 5%.	Roulette.	1. Journal of input control. 2. Warnings and instructions. 3. Journal of remarks. 4. Journal of the customer's IC. 5. Journal of the IC contractor. 6. Report on the results of testing pipes with factory coating at the first stage of incoming inspection (according to the form of Appendix A OR-03.100.50-KTN-120-10).
7.1.4	Carrying out routine work on incoming control at the first stage (carried out for pipe products subject to technical supervision in accordance with RD-03.100.50-KTN-122-13)	1. Checking incoming products for compliance with technical requirements, working documentation, quality certificates (or declarations of conformity); 2. Checking the presence of markings in accordance with the requirements of regulatory documents, as well as their compliance with the data specified in passports and certificates (or declarations of conformity); 3. Reconciliation of serial numbers of products with technical supervision data for products that have been accepted by the customer’s technical supervision representative at the manufacturing plant and shipped to the customer’s address - only for supervised products supplied by third-party organizations (not OST) that repackage MT during work ( not included in the OST Development Program) for the reconstruction of railways, roads and other communications, and having direct contracts with Transneft Nadzor LLC for construction control and technical supervision services; 4. Checking the availability of originals (or duly certified copies) of passports, certificates (or declarations of conformity) certifying the compliance of products with the specifications for delivery. 5. Checking the presence in passports and certificates (or declarations of conformity) of a mark on the acceptance of products by the technical supervision of the customer at the manufacturer's plant; 6. Checking the products for any damage that occurred during transportation.	Visual -100%		1. Journal of input control. 2. Warnings and instructions (if the customer's IC authority is involved). 3. Journal of the IC of the customer (in case of involvement of the body of the IC of the customer). 4. Report on the results of testing pipes with factory coating at the first stage of incoming inspection (according to the form of Appendix A OR-03.100.50-KTN-120-10).
7.2	Carrying out routine maintenance on the input control of fittings and valves, as well as at the second stage of the input control of pipe products
7.2.1	Quality control of pipes, valves, fittings, materials and equipment using instrumental control.	Checking for compliance with OTT and RD-23.040.00-KTN-073-15 in terms of: - the absence of unacceptable mechanical damage, metallurgical defects and corrosion, including delaminations that go to the edge and surface of products, nicks, scratches, dents on the body and at the ends; - deviations of the pipe diameter and wall thickness from the nominal dimensions; - compliance of the value of deviations of the chamfer angle, the obliqueness of the cut of the ends, the ovality of the ends, the curvature of the pipes and the removal of the reinforcement of the internal seam with the requirements of the current norms and rules; - lengths of uninsulated sections of pipe ends; - availability of marking and compliance with its passport data; - the absence of unacceptable defects in welds; - thickness and continuity of the insulating coating. For pipes with heat-insulating coating: - control of the thickness and integrity of the heat-insulating coating.	Visual -100%; Instrumental - in the amount of 5% selectively. Ultrasonic wall thickness measurement in a volume of 5% (at least at five points evenly distributed along the circumference. If a defect is detected, the inspection volume is 100% of the lot.	Magnifier. Roulette. measuring device of geometrical parameters of welded joints with measurement accuracy + 0.1 mm. Ultrasonic thickness gauge. Caliper ШЦ 500-1600 (Depending on the Du of the pipeline). Stenkomer. Pipe micrometer. Micrometer depth gauge. Ruler. Spark flaw detector.	1. Journal of the customer's IC. 2. Journal of comments and suggestions 3. Warnings and instructions 4. General journal of work 5. Journal of the Contractor's IC.	Permission to use products. Acts of visual-measuring control (In the amount of % control)**
7.2.2	Monitoring the state of shut-off valves (gate valves) without an electric drive.	Checking the fittings for compliance with the requirements for compliance with the requirements of the project, RD-23.040.00-KTN-073-15 and OTT in terms of: - the absence of unacceptable mechanical damage, metallurgical defects and corrosion; - the absence of delaminations that go to the edge and surface of the products; - absence of nicks, scuffs, scratches, dents on the body, ends and on the connecting surfaces; - the value of the deviation of the wall thickness from the nominal size; - compliance with the project of the deviation of the angle of the chamfer and the factory cutting of the edges for welded gate valves; - ovality at the ends for welded products; - smoothness of movement of all moving parts of the reinforcement; - integrity and absence of damage to the steering wheel, handles (controls), protective insulation.	Visual - 100%. Instrumental - in the amount of 5% of the party. If a marriage is detected, the volume of control is 100% of the batch.	Magnifier. Roulette. Calipers. measuring device of geometrical parameters of welded joints with measurement accuracy + 0.1 mm, Ultrasonic thickness gauge. Caliper ШЦ 500-1600 (Depending on the Du of the pipeline). Stenkomer. Pipe micrometer. Micrometric depth gauge. Ruler.	1. Journal of the customer's IC. 2. Journal of comments and suggestions 3. Warnings and instructions 4. General journal of work 5. Act on VIC; 6. Conclusion on ultrasonic testing 7. The act of acceptance and transfer of equipment for installation. 8. Journal of the IC contractor.
7.2.3	Control of the state of the electric drive of shut-off valves.	The control parameters are determined by OTT-75.180.00-KTN-166-10: - compliance with the requirements of the type project, climatic version and operating parameters of the drive; - smoothness of rotation of the electric drive in manual and el. driving mode; - serviceability of the electric drive and electrical equipment; - tests according to EIC Chapter 1.8 Section 1.8.15.	Visual -100% the whole process of taking measurements.		1. Journal of the customer's IC. 2. Journal of comments and suggestions 3. Warnings and instructions 4. General journal of work 5. Act of acceptance and transfer of equipment for installation. 6. Protocol for measuring insulation resistance. 7. Act on detected defects e-mail. equipment. 8. Journal of the IC contractor.
7.2.4	Testing of valves for strength, density and tightness. (For fittings not tested as part of the linear part.	1. Checking the tightness of the gland seal, the gasket between the cover and the body, the top seal of the cover-spindle, the tightness of the valve, the integrity of the drain tubes and factory insulation. 2. Control of hydraulic tests of valves.	Visual -100% of the entire testing process.		1. Journal of the customer's IC. behind construction. 2. Journal of comments and suggestions. 3. Act hydraulic test shutoff valve. 4. Warnings and instructions. 5. General work log. 6. Journal of the IC contractor.	Shipment permit for export to the route of products that have passed the input control.**
7.2.5	Processing the results of input control.	Marking of products examined by building control: "P" - suitable; "R" - requiring repair; "U" - fit after repair; "B" - unsuitable:	Visual method for the presence of markings inside the pipe cavity with indelible paint.		1. Act on the results of checking products for compliance with technical documentation in the form 3.3 VSN 012-88. 2. Entry in the input control log 3. Customer's IC log. 4. Journal of the Contractor's Inspectorate.	Shipment permit for export to the route of products that have passed the input control.**
* - instruments and control instruments in accordance with OR-91.200.00-KTN-284-09. **- permission of the SC to perform the subsequent stages of work is issued in the cases specified in clause 7.2.16 of OR-91.200.00-KTN-108-16.

8 The procedure for the implementation of construction control during the input control of insulating and heat-insulating materials, preparing the surface of the pipeline and applying an insulating and heat-insulating coating

8.1 During the input control of insulating materials, the following is checked:

Compliance of heat-shrinkable cuffs with the requirements of the project, the manufacturer's specifications, other norms and rules; completeness and warranty periods

Conformity physical properties epoxy primer (primer) to the requirements of norms and rules;

Compliance of storage of insulating materials with the requirements of norms and rules;

Compliance of the gas used to heat the insulated joints with the requirements of the working documentation for the composition and climatic modification;

Compliance of hoses and burners used for heating insulated joints with the requirements of normative and technical documentation and technical design.

8.2 During the input control of heat-insulating materials, the following is checked:

Compliance of heat-insulating materials and products with project requirements.

Compliance of couplings with project requirements, integrity, geometric dimensions.

8.3 Methods and scope of control.

8.3.1 Visual and measuring control:

1) selective inspection of polymer tapes, heat-shrinkable cuffs and other insulating materials in warehouses - 5% of the total volume, selectively checking the quality of heat-shrink cuffs and tapes:

Inspection (quality and condition of the adhesive layer, absence of through damage, integrity of the couplings),

Instrumental (width, thickness of the tape, adhesion to the primed steel surface and in the overlap) * - 1 sample from the batch, but not less than 1 sample from 50 rolls

2) selectively checking the quality of the primer (glue, primer):

Inspection (homogeneity), package integrity, marking, expiration date

Instrumental - density[*], viscosity*, dry residue*, adhesion* - 1 sample from a batch.

8.4 Timing of the SC.

8.4.1 The performer of the work shall, in time sufficient for the mobilization of the SC specialists, but not less than 1 day in advance, notify the deadlines for completing the work and presenting them for examination. Notification of the IC body of the need to carry out control measures for the acceptance of work performed, if it is necessary to present works that require specialized control and measuring equipment, is made 3 working days in advance.

8.4.2 The timing of routine maintenance for the implementation of construction control during the input control of insulating and heat-insulating materials, preparing the surface of the pipeline and applying insulating and heat-insulating coatings during the construction of the linear part of the MN and MNPP should be calculated based on the volume of construction and installation work performed, taking into account 100% visual and 5% of instrumental control, but should not exceed 1 working day after the work is submitted for control/survey by the construction contractor.

8.4.3 The control of the completeness of execution of the as-built documentation is carried out by the personnel of the IC daily upon the completion of the relevant work at the facility with a note in the construction control log of the customer and the contractor.

8.4.4 Routine work on the implementation of construction control during the input control of insulating and heat-insulating materials, preparing the surface of the pipeline and applying insulating and heat-insulating coatings during the construction of the linear part of the MN and MNPP are given in Table 3.

Note

Table 3 - Routine work on the implementation of construction control during the input control of insulating and heat-insulating materials, preparing the surface of the pipeline and applying insulating and heat-insulating
coatings

stage number.	Name of works or technological stages	Object, control parameters	Method and scope of control by the UK	Devices and instruments of control*	A document confirming the completion of the stage and the control performed	Document, SC based on the results of the performed control
8.1	Preparatory work
8.1.1	Control of compliance of insulating and heat-insulating materials (including repair materials) with the requirements of the project and OTT.	1. Availability of production certification of the technology of applying an insulating coating and quality control of applying an insulating coating. 2. Availability of passports and certificates of conformity for insulating materials. 3. Correspondence of the batch number on the package with the number indicated in the passport. 4. Compliance with the type of insulating coating specified in the project. 5. No through damage to the insulating coating. 6. Compliance of the completeness of the delivered insulating materials with the requirements of the manufacturer's specifications (TUM linear dimensions, thickness, locking plate, two-component primer, longitudinal applicators)	Visual -100% Instrumental - 5% of the part	Micrometer Vernier caliper Tape measure	1. Act on the results of checking products for compliance with technical documentation in the form 3.3 VSN 012-88. 2.Journal of input control 3.Journal of comments and suggestions. 4. Prescription 5. Journal of the customer's IC. 6. Journal of the IC contractor.
8.1.2	Checking the conditions of transportation and storage of insulating materials, materials included in the set of thermal insulation of joints, instruments and equipment used for applying TUM and heat-insulating sleeves.	1. Place, method, conditions of storage, excluding their damage, moisture and contamination in accordance with the requirements of technical specifications for materials. 2. Transportation - the integrity of the container. 3. Storage conditions and temperature before use 4. Contents 5. Availability valid documents on verification of measuring instruments and equipment	Visual method as materials arrive.	Alcohol thermometer with measurement range - from minus 50°С to 50°С.	1. Journal of comments and suggestions. 2. Input control log 3. Warnings and instructions 4. Customer's IC log. 5. Contractor's IC log	-
8.1.3	Simultaneously with the production certification of the technology for applying the FCM, the production certification of the repair technology is carried out, both for the factory insulating coating, and for the repair of the FCM after checking the adhesion for each type of applied factory insulation.	1. No damage to the insulation coating before lowering		Spark flaw detector with a voltage of 5 kV per 1 mm of pipe insulation thickness + 5 kV for air gaps. Contractor's laboratory in the presence of the UK.	1.Act of control of the integrity of the insulating coating 2.Prescription 3. Journal of the customer's IC. 4. Journal of the Contractor's Inspectorate.	-
8.2	Quality control of applied insulating coatings
8.2.1	Quality control of insulation of welded joints with heat-shrinkable cuffs during underground and above-ground laying of an oil pipeline
8.2.1.1	Cleaning the Weld Joint Surface	The control parameters are determined by the instructions of the manufacturers and the specifications for the materials used, PD, RD-23.040.00-KTN-366-09. 1. Degreasing with technical acetone. 2. Drying. 3. Compliance with the design of the materials used for sandblasting. 4. The degree of cleaning of welded joints. 5. The degree of roughness. 6. The degree of dust removal.	Instrumental - 100% welded joints	Cleaning standard, TK-5M Constant - K5 Adhesive transparent tape roughness sample, dedusting template	1. Journal of insulation and laying works and repair of insulation 2. Journal of comments and suggestions. 3. Prescription. 4. Journal of the customer's IC. 5. Journal of the IC contractor.
8.2.1.2	Applying epoxy primer.	1. Dedusting the joint. 2. Heating of butt joints. 3. Application of epoxy primer.	Visual -100%. Instrumental - 100%.	Contact thermometer. Sticky transparent tape.	1. Journal of insulation and laying works and repair of insulation 2. Journal of comments and suggestions. 3. Act on the results of checking products for compliance with technical documentation in the form 3.3 VSN 012-88 4. Prescription 5. Journal of the customer's IC. 6. Journal of the IC contractor.
8.1.2.3	Application of heat-shrinkable cuffs.	The control parameters are determined by OTT-25.220.01-KTN-200-14, the instructions of the manufacturers of the materials used, PD: 1. Installation of the TUM and the locking plate 2. Compression and heat shrinkage of the cuffs. 3. Uniformity and density of surface compression welded joint. 4. Absence of corrugations, swellings, air cavities and bubbles, burn-throughs 5. The presence of overlap on the factory coating and overlap in the area of ​​the lock plate. 6. Release of adhesive at the ends of the sleeve after cooling. 7. The value of adhesion to metal, factory insulating coating, welded joint. 8. TUM coating thickness. 9. Checking the adhesion of TUM after thermal stabilization 24 hours after application.	Visual -100% Instrumental - 5% Adhesion - 1 cuff of 10 insulated joints, but not less than 1 per shift.	Ruler. Adhesion meter. The thickness gauge is magnetic.	1. Journal of insulation and laying works and repair of insulation 2. Journal of comments and suggestions. 3. Act of testing protective coatings of welded joints of pipelines 4. Act of determining the adhesion of protective coatings made of polymer tapes 5. Warnings and instructions 6. Journal of the customer's IC. 7. Journal of the IC contractor.	Acts of visual - measuring control (In the amount of % control)
8.1.2.4	Repair of damaged areas of factory insulation and TUM after checking for adhesion.	1. Incoming control of repair materials 2. Availability of certified technology for repairing the insulating coating.	Visual -100%.		1. Journal of insulation and laying works and repair of insulation 2. Journal of insulation repair. 3. Journal of the customer's IC. 4. Journal of the Contractor's Inspectorate.
8.1.2.5	Checking the integrity of the insulating coating and applying heat-shrinkable cuffs.	1. The correctness of the control in accordance with the operating manual for the flaw detector. 2. No damage to the insulation coating before lowering.	Visual -100%. Instrumental - 100%.	Contractor's laboratory in the presence of an IC engineer. Electric flaw detector with a voltage of 5 kV per 1 mm of pipe insulation thickness + 5 kV for air gaps	1. The act of monitoring the continuity of the insulating coating. 2. Warnings and prescriptions. 3. Journal of the customer's IC. 4. Journal of the Contractor's Inspectorate.
8.1.2.6	If it is necessary to isolate the joints of pipes, bent bends, fittings, LZ, etc. having different types factory insulation is developed, agreed upon and certified in the generally accepted manner, the corresponding technical solution.	1. No damage to the insulating coating before admission to the trench.	Visual -100%. Instrumental - 100%. Electric flaw detector with a voltage of 5 kV per 1 mm of pipe insulation thickness + 5 kV for air gaps	Contractor's laboratory in the presence of an IC engineer.	1. The act of monitoring the continuity of the insulating coating. 2. Prescription. 3. Journal of the customer's IC. 4. Journal of the Contractor's Inspectorate.	AOCP/Permit for laying the pipeline** (for underground pipeline laying, in case of expiration of the permit specified in the AOCP for the previous stage of work, valid for 3 calendar days from the date of issuance of the permit)
8.2.1.7	Quality control of the insulation of completed underground sections of the pipeline.	1. The cathodic polarization parameters must comply with GOST R 51164 and RD-29.035.00-KTN-080-10. 2. Connecting a temporary ECP no later than 3 months after backfilling.	Instrumental - 100%.	Customer's laboratory in the presence of SC.	1. The act of assessing the quality of insulation of repaired areas by the method of cathodic polarization. 2. Journal of comments and suggestions. 3. Prescription. 4. Journal of the customer's IC. 5. Journal of the IC contractor.	-
8.3	Installation of couplings and couplings with seals at the joints of pipes with a heat-insulating coating
	Installation of couplings at the joints of pipes with a heat-insulating coating.	Control parameters are determined by OTT-25.220.00-KTN-176-15 and OTT-25.220.00-KTN-179-15. 1. The quality of the application of heat-shrinkable cuffs. 2. Dust removal of applied cuffs. 3. The quality of the installation of couplings. 4. Compliance with the technology of pouring material into couplings. 5. The quality of sealing couplings.	Visual -100% Instrumental - 100%	Probe, ruler. Duct tape	1. Journal of insulation and laying works and repair of insulation 2. Journal of comments and suggestions. 3. Adhesion test report. 4. Prescription. 5. Journal of the customer's IC. 6. Journal of the IC contractor.	1.AOCP/Permit for laying the pipeline** (in case of expiration of the permit specified in the AOCP for the previous stage of work, it is valid for 3 calendar days from the date of issuance of the permit) 2.VIC acts (In the scope of % control).
* - devices and control instruments in accordance with OR-91.200.00-KTN-284-09 **- permission of the Investigative Committee to perform subsequent stages of work is issued in cases specified in clause 7.2.16 of OR-91.200.00-KTN-108 -16.

for incoming inspection of pipesby object:

1. Application area
2. The procedure for conducting input control
3. pipe incoming inspection equipment
4. The composition of the brigade by profession
5. Acceptance, rejection and inspection of pipes
6. Reference list

1. APPLICATION AREA.

Developed for the performance of works on the input control of pipes before and during the construction of the facility

Incoming quality control of pipes should be carried out in accordance with the requirements of the following regulatory documents:

– . Main pipelines;

– . Protection of building structures and structures from corrosion;

– . Construction of main pipelines. Work organization technology;

– . Construction of main and field pipelines. Quality control and acceptance of works;

– GOST 24297-87. “Incoming control of products. Basic provisions.

– requirements of passports, specifications and other accompanying documents.

2. The procedure for conducting input control

In accordance with the requirements of OR-03.100.50-KTN-120-10, pipes entering the construction of pipelines are subject to incoming inspection, which provides for the examination and rejection of pipes.

The incoming quality control of insulated pipes shall be carried out in accordance with Section 2 ОР-03.100.50-KTN-120-10.

Each batch of pipes must have a manufacturer's certificate, which indicates the order number, technical specifications or GOST, according to which the pipes are made, the size of the pipes and their number in the batch, the results of hydraulic and mechanical tests, pipe serial numbers and batch number. 100% of incoming pipes are subject to inspection.

It is carried out in two stages:

first stage control is carried out by the consignee in the process of unloading pipes from railway platforms (gondola cars), in order to check their compliance with the project and certificate, as well as to identify damage during pipe transportation. At the same time, the pipe shape (absence of ellipticity), the condition of the pipe ends, the condition of the anti-corrosion coating (the absence of scratches, bottomholes, dents) are controlled by external inspection. If defects are found, an act is drawn up with the participation of representatives railway about the presence of damage. Rejected products are moved to a separately designated place allocated at the unloading site;

second phase control is carried out after unloading the pipes by the contractor's quality control service and the customer's technical supervision using instrumental control.

Pipes are considered suitable provided that they:

• meet the requirements of technical specifications and delivery standards and have factory markings and certificates;
• at the ends of the pipes in a zone 40 mm wide from the end, there are no delaminations of any size that go to the edge or surface of the pipe;
• there are no dents on the body and ends of the pipes. It is allowed to repair dents not exceeding 3.5% of the outer diameter of the pipe;
• there are no nicks or nicks on the ends of the pipes. Their repair is allowed if they do not exceed 5 mm;
• deviation of the outer diameter of pipes over a length of at least 200 mm from the end does not exceed 1.6 mm;
• ovality of pipes does not exceed 1% of the nominal outer diameter;
• the curvature of the pipes does not exceed 1.5 mm per 1 m of length, and the total curvature does not exceed 0.2% of the pipe length;
• the depth of scratches, scratches and scuffs on the pipe surface does not exceed 0.4 mm;
• in places damaged by corrosion, the thickness of the pipe wall should not go beyond minus tolerances.

Pipes that have passed the inspection must be marked after the second stage of control.

Marking is done inside the pipe at a distance of 100-150 mm from the end with a white marker in the following order:

• pipe serial number:
• index of the category to which the pipes are assigned after survey:

"P" - suitable for use;

"P" - requiring repair for further use;

"B" - not suitable for further use.

Based on the results of pipe inspection at the first and second stages, certificate data and pipe marking, the pipe acceptance commission draws up a pipe quality inspection report in the form presented in OR-03.100.50-KTN-120-10. The act indicates the reasons as a result of which the pipes required repair or became unusable.

The pipes are presented to the Customer and the contractor.

The responsibility for the quality of the pipes accepted by the incoming inspection, their subsequent transportation, warehousing and storage is borne by the contractor.

Pipes recognized as suitable are placed in a stack of temporary storage of pipes or taken out to the construction route, after obtaining a permit for shipment of the pipe to the route.

3. equipment for incoming inspection of pipes

Devices and tools intended for control must be factory-made, have passports, technical descriptions, operating instructions, and have verification documents in the center of metrology and standardization.

To control the quality of materials and results of work at the construction site, it is recommended to have and use a set of measuring equipment presented in Table 3.1.

Table 3.1 Devices and tools for control and measurement

Incoming inspection of pipes and bends
Measuring tape	GOST 7502-80	Pipe outer diameter, ovality, pipe length
Micrometer	GOST 6507-78
Ruler	GOST 427-75	Pipe curvature
magnifying glass	—	Inspection of the pipe surface
Welder template	UShS-3	Edge preparation check
calipers	SW 0-1600	Pipe wall thickness at the ends
Ultrasonic thickness gauge	UT-93P	Wall thickness

The given devices and equipment can be replaced by similar ones.

1. COMPOSITION OF THE TEAM BY PROFESSION

Incoming control is carried out by a commission formed by the order of the recipient organization of pipes, consisting of representatives of the following services:

• material and technical supply (MTS) of the consignee;
• quality control of the consignee;
• construction control of the customer (as agreed);
• cargo transportation of a transport company (as agreed);
• manufacturer (in the case provided for by the terms of delivery of pipes’ as agreed).

As a rule, the functions of the consignee are assigned - under the terms of the contract - to the contracting construction organization.

5. Acceptance, rejection and inspection of pipes

5.1. Grading rates

Factory marking of pipes should include the number and size of pipes, steel grade, batch number, year of manufacture, quality control stamp, trademark of the manufacturer.

At the ends of the pipes and in a zone 40 mm wide from the end, there should be no delaminations of any size that extend to the edge or surface of the pipe.

In places affected by corrosion, the thickness of the pipe wall should not go beyond minus tolerances (see Table 5.1).

The length of the pipes should be within 10500-11600mm, it is allowed to manufacture and supply pipes with a length of up to 12200mm and a length of 18000mm and 24000mm as agreed with the customer.

The deviation of the profile of the outer surface of the pipe from the circle in the zone of the welded joint at the end sections 200 mm long from the ends and along the perimeter arc of 200 mm should not exceed 0.15% of the nominal diameter.

The curvature of the pipes should not exceed 1.5 mm per 1 m of length, and the total curvature - 0.2% of the pipe length.

Limit deviations from the nominal outer diameter at the ends of the pipes at a length of at least 200 mm from the end should be no more than ± 1.6 mm. When measuring the outer diameter of pipes with a diameter of up to 57 mm inclusive, the arithmetic mean of diameter measurements in two mutually perpendicular directions is taken as the diameter value. Measurements are carried out with a caliper with an error of not more than 1.0 mm. For pipes with a diameter of more than 57 mm, the value of the outer diameter D (mm) is calculated by the formula:

P - perimeter (mm), measured with a tape measure with an accuracy of 0.5 mm;

T is the thickness of the roulette tape, mm.

Tolerance for ovality of pipes (the ratio of the difference between the largest and smallest diameters in one section to the nominal diameter) should not exceed 1% at the ends of pipes with a wall thickness of less than 20.0 mm and 0.8% at the ends of pipes with a wall thickness of 20.0 mm and more.

Deviations from the straightness of the ends of the pipes by more than 0.5 mm for a length of up to 500 mm, measured by the gap between the metal ruler placed on the edge, and the inner or outer surface of the pipe are not allowed.

In the zone of the factory weld, the width of the bluntness is not more than 3.0 mm.

The shape and dimensions of cutting the edges of the pipe ends for welding, depending on the wall thickness, must correspond to the parameters set in Figure 5.1.

a) with S up to 15.0 mm inclusive b) with S more than 15.0 mm

Wall thickness deviations at the ends should not exceed the limit values ​​specified in Table 5.1. The wall thickness is measured at the ends of the pipes with a caliper at least at five points evenly distributed around the circumference with an error of not more than 0.1 mm. In places affected by corrosion, the wall thickness is measured using an ultrasonic thickness gauge with an accuracy of at least 0.1 mm.

Pipe ends must be cut square. The oblique cut of the ends of the pipes should not exceed 1.6 mm.

Welded pipe joints must have a smooth transition from the base metal to the weld metal without sharp corners, undercuts, lack of penetration, sinks, axial looseness and other defects. The height of reinforcement of external seams should be in the range of 0.5-2.5 mm for pipes with a wall thickness of up to 10 mm inclusive, and 0.5-3.0 mm for pipes with a wall thickness of more than 10 mm. The height of reinforcement of internal seams should be at least 0.5 mm.

The height of reinforcement of external seams should be in the range of 0.5-3.0 mm. The height of reinforcement of the inner seam must be at least 0.5 mm. At the ends of the pipes, over a length of at least 150 mm, the reinforcement of the internal weld must be removed to a residual height of not more than 0.5 mm. Scoring (cutting) of the pipe body is not allowed.

The offset of the welded longitudinal edges should not exceed 10% of the nominal wall thickness, but not more than 3 mm.

The reinforcement width of welded joints for pipe wall thickness up to 16.0 mm inclusive should be no more than 25.0 mm, for thickness over 16.0 mm - no more than 30.0 mm. In places of repair, it is allowed to increase the width of the seam by 4.0 mm additionally.

Pipes welded by contact welding must be deburred.

Damage to the factory insulating coating in depth should not exceed 0.5 mm. Blisting of the coating and delamination of the coating along its ends are not allowed. With a damage depth of 0.5 mm or more, repair of the coating is required. Damaged insulating coatings are checked by a flaw detector for breakdown at electrical voltage 5kV/mm.

Residual magnetism at the free end of the pipes should not exceed 30 gauss.

5.2 Limit deviations for pipe wall thickness

Limit deviations in pipe wall thickness are given in Table 5.1.

Table 5.1 Limit deviations in pipe wall thickness

Wall thickness, mm	Limit deviations in pipe wall thickness, mm (GOST 19903-74)
	outer diameter of pipes, mm
	159-219		245-275		325-426		530-630		720		820		over 820
	+	–	+	–	+	–	+	–	+	–	+	–	+	–
3,9-5,5	0,2	0,4	0,3	0,4	0,3	0,5	0,4	0,5	0,45	0,5
5,5-7,5	0,1	0,5	0,2	0,5	0,25	0,6	0,4	0,6	0,45	0,6
7,5-10	0,1	0,8	0,2	0,8	0,3	0,8	0,35	0,8	0,45	0,8	0,6	0,8
10-12	0,2	0,8	0,2	0,8	0,3	0,8	0,4	0,8	0,5	0,8	0,7	0,8	1,0	0,8
12-25									0,8	0,8	1,0	0,8	1,2	0,8

5.3. Pipe repair

Pipes may be repaired after survey if:

- the depth of scratches, scratches and scuffs on the surface of the pipes does not exceed 5% of the wall thickness, but not more than the minus tolerances for the wall thickness specified in the OTT and CTT for pipes;

- dents at the ends of the pipes have a depth of no more than 3.5% of the outer diameter;

It is not permitted to repair by welding any damage to the body of the pipe, including dents at the pipe ends, nicks and chamfer burrs. The damaged section of the pipe must be cut off and the required bevelling done by a bevelling machine.

– there are delaminations on the end sections of the pipes, which can be removed by cutting.

Pipe repairs are carried out in accordance with the requirements of RD-25.160.00-KTN-037-14.

Repair of the insulating coating is carried out in accordance with the Instructions for the repair of the factory insulating coating.

10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23.
SCHEMES OF INPUT AND OPERATIONAL QUALITY CONTROL OF CONSTRUCTION AND ASSEMBLY WORKS

INPUT INSPECTION OF STEEL PIPES AND CONNECTING PARTS

LIST OF REGULATORY DOCUMENTS

GOST 10705-80* Electric-welded steel pipes. Specifications.

GOST 10704-91 Longitudinally welded steel pipes. Assortment.

GOST 20295-85 Welded steel pipes for main gas and oil pipelines. Specifications.

GOST 10706-76* Straight-seam electric-welded steel pipes. Specifications.

GOST 8696-74* Steel electric-welded pipes with a spiral seam general purpose. Specifications.

GOST 8731-74* Hot-formed seamless steel pipes. Specifications.

GOST 8732-78* Hot-formed seamless steel pipes. Assortment.

GOST 8733-74* Cold-formed and heat-formed seamless steel pipes. Specifications.

GOST 8734-75* Cold-formed seamless steel pipes. Assortment.

GOST 3262-75* Steel water and gas pipes. Specifications.

TU 1104-137300-357-01-96 Steel water and gas pipes.

TU 14-3-943-80 Electric-welded steel pipes.

TU 14-3-190-82 Seamless steel pipes for boiler plants and pipelines.

TU 14-3-1399-95 Electric-welded steel pipes.

TU 14-3r-13-95 Straight-seam electric-welded steel pipes with a diameter of 20 to 159 mm.

TU 1390-002-01297858-96 Steel pipes with an external anti-corrosion coating made of extruded polyethylene (JSC VNIIST, AKH named after K.D. Pamfilov, Moscow, CJSC "ISOPAYP", Ryazan).

TU 1390-001-21042669-98 Steel pipes with a diameter of 57530 mm with an outer coating based on extruded polyethylene (LLP "Line", Moscow).

TU 1390-003-11928001-2001 Steel pipes with an outer two-layer coating based on extruded polyethylene (CJSC "Druza", Orenburg)

TU 1390-003-01297858-2003 Steel pipes with a diameter of 89-530 mm with an external anti-corrosion coating made of extruded polyethylene (ZAO "IZOPIPE", Ryazan, ZAO VNIIST-TSAPTR, Moscow).

TU 1390-003-01297858-99 Steel pipes with an outer two-layer coating based on extruded polyethylene (Mapik LLC, Moscow).

TU 1390-005-01297858-98 Steel pipes with an outer two-layer protective coating based on extruded polyethylene (JSC VNIIST, AKH named after K.D. Pamfilov. State Unitary Enterprise MOE Pipe Producing Plant, Moscow).

TU 1394-005-04005951-97 Steel pipes with an external protective coating made of extruded polyethylene with an outer diameter of 572020 mm (SUE "NIIMosstroy", SUE MOETZK, Moscow).

TU 1394-009-04005951-99 Steel pipes with an outer two- and three-layer protective coating based on extruded polyethylene (JSC VNIIST, State Unitary Enterprise MOETZK, Moscow).

TU 1394-011-04005951-2000 Steel pipes with a two- and three-layer outer protective coating based on extruded polypropylene (JSC VNIIST, State Unitary Enterprise MOETZK, Moscow).

TU 1394-016-04005951-2002 Electric-welded steel pipes with a diameter of 57 to 720 mm with an external anti-corrosion polyethylene coating for gas pipelines (LLC VNIIGAZ, State Unitary Enterprise MOE Pipe Procurement Plant, Moscow).

TU 1394-017-04005951-2002 Electric-welded steel pipes with a diameter of 820 to 1420 mm with an external three-layer anti-corrosion polyethylene coating for main gas pipelines (VNIIGAZ LLC, State Unitary Enterprise MOE Pipe Procurement Plant, Moscow).

TU 1394-018-04005951-2002 Steel pipes with an external protective epoxy coating (JSC VNIIST, Moscow, State Unitary Enterprise MOE Pipe Producing Plant).

TU 1394-020-04005951-2003 Steel pipes with an external three-layer and two-layer polyethylene coating for the construction of main oil pipelines (ZAO VNIIST-TSAPTR, Moscow, State Unitary Enterprise MOE Pipe Procurement Plant).

TU 1468-006-01297858-2001 External polyurethane coating for anticorrosive protection of parts of connecting units and pipeline units with a diameter of 108 to 1420 mm (JSC VNIIST, Moscow, State Unitary Enterprise MOE Pipe Producing Plant).

TU 1469-002-04834179-2001 Connecting parts and assemblies of pipelines with a diameter of 219 to 1420 mm with an external anti-corrosion polyurethane coating (LLC VNIIGAZ, JSC "Trubodetal", Chelyabinsk).

TU 1469-004-04834179-2002 Connecting parts and assemblies of pipelines with a diameter of 325 to 1420 mm with an external anti-corrosion polyurethane coating (JSC VNIIST, Moscow, JSC "Trubodetal", Chelyabinsk).

TU 1390-006-01297858-99 Steel pipes with an outer two-layer protective coating based on extruded polyethylene (JSC VNIIST, Moscow).

TU 1390-008-01297858-2002 Pipes and welded pipe sections with a diameter of 114720 mm with an external anti-corrosion coating based on extruded polyethylene (JSC VNIIST, Moscow).

TU 1390-001-00186654-99 Longitudinal electric-welded steel pipes with a diameter of 508-1420 mm with an external protective coating based on extruded polyethylene (JSC "VNIIST", Moscow).

TU 1390-003-00154341-98 Electric-welded and seamless steel pipes with an external two-layer anti-corrosion coating based on extruded polyethylene (VNIIST JSC, Moscow, Uraltransgaz LLC, Truboplast Enterprise LLC, Ekaterinburg).

TU 1390-004-32256008-2003 Steel pipes with a diameter of 57530 mm with an outer two- and three-layer protective coating based on extruded polyethylene (ZAO VNIIST-TSAPTR, Moscow, OOO Truboplast Enterprise, Yekaterinburg).

TU 1390-008-00154341-2002 Steel pipes with a diameter of 57530 mm with an external three-layer anti-corrosion coating based on extruded polyethylene (Uraltransgaz LLC, Truboplast Enterprise LLC, Ekaterinburg).

TU 1390-012-00154341-2002 Steel pipes with a diameter of 102530 mm with an internal protective coating based on epoxy powder compositions (Uraltransgaz LLC, Truboplast Enterprise LLC, Ekaterinburg).

TU 1390-001-01284695-2000 Steel pipes with internal epoxy coating "CORON" (JSC "ATZ", Almetyevsk, Tatarstan).

TU 1390-002-01284695-97 Steel pipes with an external anti-corrosion coating based on extruded polyethylene (JSC ATZ, Almetyevsk, Tatarstan).

TU 1390-003-01284695-2000 Steel pipes with an external anti-corrosion coating based on extruded polyethylene (JSC VNIIST, AKH named after K.D. Pamfilov, Moscow, JSC "ATZ", Almetyevsk, Tatarstan).

TU 1390-011-01284695-2003 Steel pipes with a diameter of 57530 mm with an outer two-layer and three-layer protective coating based on extruded polyethylene (ZAO VNIIST-TSAPTR, Moscow, OAO ATZ, Almetyevsk, Tatarstan).

TU 14-3R-33-2000 Electric-welded steel pipes with a diameter of 530 to 1420 mm with an external three-layer anti-corrosion polyethylene coating for main gas pipelines (OOO VNIIGAZ, OAO PO Volzhsky Pipe Plant, Volzhsky, Volgograd Region).

TU 14-3R-39-2000 Steel pipes with a two- and three-layer outer protective coating based on extruded polypropylene (JSC VNIIST, Moscow, JSC PO VTZ, Volzhsky, Volgograd region).

TU 14-3R-49-2003 Seamless and welded steel pipes with a diameter of 102-1420 mm with an external protective coating based on extruded polyethylene (ZAO VNIIST-TSAPTR, Moscow, OAO PO VTZ).

TU 14-3R-37-2000 Longitudinal electric-welded steel pipes with a diameter of 102 to 1220 mm with an outer coating based on extruded polyethylene (OJSC "VMZ", Vyksa, Nizhny Novgorod region).

TU 14-3R-42-2000 Electric-welded steel pipes with a diameter of 102 to 426 mm with an external anti-corrosion polyethylene coating for gas pipelines (LLC "VNIIGAZ", JSC "VMZ", Vyksa, Nizhny Novgorod region).

TU 14-3R-43-2000 Electric-welded steel pipes with a diameter of 508 to 1220 mm with an outer three-layer anti-corrosion polyethylene coating for main gas pipelines (LLC "VNIIGAZ", JSC "VMZ", Vyksa, Nizhny Novgorod region).

TU 1469-004-01297858-2002 Cold bending curves from steel electric-welded pipes 530 and 1220 mm with an insulating coating (JSC VNIIST, Moscow).

TU 14-3R-36-2000 Electric-welded steel pipes with a diameter of 508 to 1420 mm with an external three-layer anti-corrosion polyethylene coating for main gas pipelines (VNIIGAZ LLC, Chelyabinsk Pipe Rolling Plant OJSC, Chelyabinsk).

TU 14-3R-61-2002 Seamless and welded steel pipes with a diameter of 102-820 mm with an outer two-layer protective coating based on extruded polyethylene (JSC VNIIST, Moscow, JSC "ChTPZ", Chelyabinsk, JSC "VMZ", Moscow .Vyksa, Nizhny Novgorod region).

TU 14-3R-66-2003 Seamless and welded steel pipes with a diameter of 102-1420 mm with an external three-layer protective coating based on extruded polyethylene (JSC "VNIIST", Moscow, JSC "Chelyabinsk Pipe Rolling Plant", Chelyabinsk).

TU 1381-002-00154341-98 Electric-welded steel pipes with a diameter of 219-1420 mm with an external anti-corrosion polyethylene coating (LLC "Kopeysk pipe insulation plant", Kopeysk, Chelyabinsk region).

TU 1381-003-00154341-2000 Electric-welded steel pipes with a diameter of 219-1420 mm with an external three-layer anti-corrosion coating based on extruded polyethylene (Uraltransgaz LLC, Yekaterinburg, KZIT LLC, Kopeysk, Chelyabinsk region).

TU 1381-004-00154341-2000 Electric-welded steel pipes with a diameter of 219-1420 mm with an outer two-layer anti-corrosion coating based on extruded polyethylene (Uraltransgaz LLC, Yekaterinburg, KZIT LLC, Kopeysk, Chelyabinsk region).

TU 1381-009-00154341-2002 Electric-welded steel pipes with a diameter of 219-720 mm with an external protective two-layer coating based on extruded polyethylene (Uraltransgaz LLC, Yekaterinburg, VNIIGAZ LLC, KZIT LLC, Kopeysk, Chelyabinsk region).

TU 1381-010-00154341-2002 Electric-welded steel pipes with a diameter of 530-1420 mm with an external protective three-layer coating based on extruded polyethylene (Uraltransgaz LLC, Yekaterinburg, VNIIGAZ LLC, KZIT LLC, Kopeysk, Chelyabinsk region).

TU 1381-013-00154341-2002 Bent bends with an external protective polyethylene coating (LLC "Uraltransgaz", Ekaterinburg, LLC "Kopeysk pipe insulation plant", Kopeysk, Chelyabinsk region).

TU 1381-002-00154341-98 Electric-welded steel pipes with a diameter of 530-1420 mm with an external anti-corrosion polyethylene coating (ZAO Uralremstroy, Chelyabinsk).

TU 4859-001-11775856-95 Steel pipes coated with polyethylene adhesive tapes (AKH named after K.D. Pamfilov, Moscow).

TU 1390-013-04001657-98 Pipes with a diameter of 57530 mm with an outer combined tape-polyethylene coating (AKH named after K.D. Pamfilov, Moscow).

TU 1390-014-05111644-98 Pipes with a diameter of 57530 mm with an outer combined tape-polyethylene coating (AKH named after K.D. Pamfilov, Firm "BOOS-M", Moscow, State Unitary Enterprise MO "Mosoblgaz", Klinsky Zavod pipe insulation, Klin, Moscow region).

TU 1394-017-50172433-2002 Steel pipes with a diameter of 57-530 mm with an outer two-layer coating based on extruded polyethylene (AKH, Klin pipe insulation plant, Klin, Moscow region).

TU 1394-016-04001657-2001 Steel pipes with an outer two-layer coating based on extruded polyethylene (AKH named after K.D. Pamfilov, Moscow, CJSC "Firm" Gazkomplekt ", Reutov, Moscow region).

TU 1394-002-47394390-99 Steel pipes with a diameter of 57 to 1220 mm coated with extruded polyethylene (AKH named after K.D. Pamfilov, Moscow, LLC "Industl", "Klimentina SK", Moscow).

TU 1390-002-70403923-2004 Steel pipes with an outer two-layer coating based on extruded polyethylene (AKH named after K.D. Pamfilov, Moscow, NefteGazKomplekt LLC, Moscow).

TU 1394-016-03005951-2002 Electric-welded steel pipes with a diameter of 57 to 720 mm with an external anti-corrosion polyethylene coating.

TU 1394-001-05111644-96 Steel pipes with a two-layer coating of extruded polyethylene (AKH named after K.D. Pamfilov, CJSC Firm Janus, Moscow, CJSC PTZ Priz-NEGAS, Penza) .

TU 2313-008-17213088-2003 External anti-corrosion coating of connecting parts and valves for the construction of main oil pipelines (ZAO VNIIST-TSAPTR, OAO NEGASPEZAPROM, Penza).

TU 1394-009-17213088-2003 Steel pipes with a diameter of 57 to 1220 mm with an outer coating based on extruded polyethylene for the construction of main oil pipelines (ZAO VNIIST-TSAPTR, Moscow, ZAO PTZ Priz-NEGAS, Moscow Penza).

TU 1394-010-17213088-2003 Steel pipes with a diameter of 57 to 1220 mm with an outer coating based on extruded polypropylene for the construction of main oil pipelines (ZAO VNIIST-TSAPTR, Moscow, ZAO PTZ Priz-NEGAS, Penza ).

TU 1394-011-17213088-2003 Steel pipes with a diameter of 508 to 1420 mm with an external three-layer anti-corrosion polyethylene coating for main gas pipelines (VNIIGAZ LLC, PTZ Priz-NEGAS CJSC, Penza).

TU 1394-012-17213088-2003 Steel pipes with a diameter of 57 to 530 mm with an external anti-corrosion polyethylene coating for gas pipelines (VNIIGAZ LLC, Priz-NEGAS CJSC, Penza).

TU 5768-003-01297858-2002 Thermally waterproofed steel pipes for oil and gas pipelines (JSC "VNIIST", Moscow, JSC "NEGASPENZAPROM", Penza).

TU 1394-003-02066613-99 Steel pipes with an external polyethylene anti-corrosion coating (LLC "Industl", Moscow).

TU 4859-003-03984155-2000 Steel pipes with external protective bituminous coating (CJSC "Izolyatsionny Zavod", St. Petersburg).

TU 1390-015-03984155-98 Steel pipes with an outer combined tape-polyethylene coating (ZAO "Izolyatsionny Zavod", St. Petersburg).

TU 1390-021-43826012-2001 Steel pipes with internal and external anti-corrosion coating (Bugulma Mechanical Plant, Bugulma, Tatarstan).

TU 2312-005-27524984-99 "Epovin" enamel BEP-5297 (inner enamel coating, OOO "Industl", Moscow).

TU 1390-001-48061320-99 Steel pipes with an outer three-layer protective coating based on extruded polyethylene.

TU 1394-040-01297775-2002 Steel pipes, thermally insulated with polyurethane foam, for oil and gas pipelines (JSC "SibNIPIgazstroy", Tyumen).

TU 5768-002-01297858-2002 Steel pipes, thermally insulated with polyurethane foam, for oil and gas pipelines (JSC "VNIIST", Moscow).

TU RB 03289805.002-98 Steel pipes with a diameter of 57530 mm with an outer coating based on extruded polyethylene.

TU RB 03289805.001-97 Steel pipes with a diameter of 57530 mm with an outer combined tape-polyethylene coating.

TU U 14-8-34-2001 Longitudinal electric-welded steel pipes with a diameter of 530-1420 mm with an external polyethylene anti-corrosion coating (JSC "VNIIST", Moscow).

TU U 13457882.001-2001 Coated steel pipes based on polyethylene with a polymer adhesive (NPP Ukrtruboizol, Dnepropetrovsk).

TU 14-3-1954-94 Longitudinal electric-welded steel pipes with a diameter of 1220 and 1420 mm with an external polyethylene anti-corrosion coating (VNIIGAZ LLC, Khartsyzsky Pipe Plant OJSC, Donetsk region).

GOST 8944-75* Ductile iron fittings with straight thread for pipelines. Technical requirements.

GOST 8946-75* GOST 8957-75*, GOST 8959-75*, GOST 8963-75* Ductile iron fittings with straight thread for pipelines. Main dimensions.

GOST 8965-75 Connecting steel parts with cylindrical thread for pipelines P 1.6 MPa. Specifications.

GOST 8966-75, GOST 8968-75, GOST 8969-75 Straight couplings, locknuts and steel shackles with cylindrical thread for pipelines P 1.6 MPa (basic dimensions).

GOST 17380-2001 Seamless welded parts of pipelines made of carbon and low alloy steel. General specifications.

GOST 17375-2001, GOST 17376-2001, GOST 17378-2001, GOST 17379-2001 Seamless welded pipeline parts made of carbon and low alloy steel. 3D bends (R1.5DN). Tees. Transitions. Plugs are eleptic. Design.

GOST 24950-81 Bent bends and curved inserts at turns of the linear part of steel main pipelines. Specifications.

State standards and specifications for other materials and technical products provided for by the project.

SNiP 3.01.01-85* Organization of construction production.

SNiP 42-01-2002 Gas distribution systems.

SP 42-101-2003 General provisions for the design and construction of gas distribution systems from metal and polyethylene pipes.

SP 42-103-2003 Design and construction of gas pipelines from polyethylene pipes and reconstruction of worn-out gas pipelines.

SP 42-102 (draft) Design and construction of gas pipelines from metal pipes.

PB 12-529-2003 Safety rules for gas distribution and gas consumption systems.

Instructions for warehousing and storage of pipes with an external factory polyethylene coating, VNIIST JSC, Moscow, 2002

Incoming inspection of pipes and fittings should be carried out in accordance with the requirements of SNiP 3.01.01.-85*

During the incoming inspection of pipes and fittings, the following should be checked:

1. Pipe size
2. Number and date of specifications
3. steel grade
4. Batch number
5. The results of mechanical tests with an indication of which numbers of melts these tests refer to
6. Hydraulic test results
7. X-ray result (if necessary)

On the inner surface of each pipe at a distance of 500 mm from one of the ends, indelible paint must be marked:

• manufacturer
• heat number
• nominal dimensions
• pipe number
• month and year of pipe manufacture
• carbon equivalent

On the outer surface of the pipes, at a distance of 100 mm from the end of the pipe, the following data should be stamped with stamps:

• pipe number
• factory logo

After checking the conformity of the use of pipes for this construction, a visual-measuring control is carried out according to the certificate.

On the surface of the pipes are not allowed:

• cracks, flaws, sunsets of any size;
• scratches, risks and scuffs with a depth of more than 0.4 mm;
• local kinks, corrugations and dents;
• delamination at the ends of the pipes.

If bundles are found, from the results of additional ultrasonic control the ends of pipes with delamination are subject to cutting. In places affected by corrosion, the wall thickness of pipes or parts should not go beyond the minus tolerances established specifications to supply. Wall thickness measurement in this area must be performed using an ultrasonic thickness gauge with an accuracy of at least 0.1 mm.

Pipes are considered suitable provided that:

• less than 200 mm from the end do not exceed for pipes with a diameter, see GOST 10705-80,20295-80.3262-75, etc.
• deviations of the wall thickness at the ends do not exceed the limit values ​​regulated by the relevant GOST 10705-80,20295-80,3262-75, etc.
• the ovality of seamless pipes does not bring their outer diameter beyond the limit deviations, GOST 10705-80,20295-80,3262-75, etc.
• the curvature of the pipes does not exceed 1.5 mm per 1 m of length, and the total curvature is not more than 0.2% of the pipe length, the oblique cut of the ends of the pipes does not exceed 2.0 mm.

1.4. It is allowed to clean the surface of pipes and parts of scratches, scratches and scuffs with a depth of more than 5% of the thickness, as well as areas of the surface affected by corrosion, provided that the wall thickness after the elimination of defects does not go beyond the established tolerances.

1.5. It is allowed to correct smooth dents at the ends of pipes with a depth of not more than 3.5% of the pipe diameter. Editing should be carried out with shockless expansion devices. At an ambient temperature below 5 degrees. C, and on pipes of strength class up to 42 and above - regardless of the ambient temperature, straightening must be carried out with mandatory heating by 100 - 150 degrees. FROM.

1.6. It is allowed to repair by welding defects in the edges of pipes (nicks, scuffs) with a depth of not more than 5 mm, followed by mechanical cleaning of the places where the defects are corrected until the necessary bevel of the edges is restored.

1.7. The sorting of pipes is carried out by representatives of the construction and installation organization, the customer, the technical supervision of the customer. An act is drawn up for rejected pipes, which should contain the following data:

• Name of the supplier plant
• Pipe diameter and wall thickness
• steel grade
• Certificate number, pipes, heats
• Date of receipt of pipes and time of their inspection
• The exact name of the detected defects, their configuration and location
• The possibility of using pipes for this construction

Pipe quality control does not end with an inspection at the unloading site. Monitoring of the state of the pipes continues during the entire period of pipeline construction.
When accepting pipes with a factory insulating coating, the condition of the coating is also checked by a visual method, and, if necessary, by an instrumental method (using a spark flaw detector). Upon detection of damage, an act is drawn up, which contains the following data:

• Place and date of inspection of the insulating coating of pipes;
• Pipe number and defect location;
• Type of defect (depth, area).

Input control of welding materials.

2.1. For each batch of electrodes, there must be a certificate indicating the brand (type) of electrodes, their diameter, manufacturer, date of manufacture, chemical composition wire and the result of testing the properties of the deposited metal. The use of welding consumables without a manufacturer's certificate is strictly prohibited.

2.2. The quality and integrity of the packaging and the guaranteed shelf life are checked.

2.3. To check the compliance of the electrodes with the requirements of GOST in terms of the quality of the coating, at least 10 and no more than 200 electrodes from the batch are selected from each packing place from different packs.

The selected electrodes are subjected to external examination without the use of devices to increase the image. The following defects are measured:

The length of dents, hairline cracks, areas of mesh cracking on the coating surface and bare areas of the rod with an error of not more than 1 mm (using a ruler), as well as the presence of bare sections of the rod, the depth of scratches, dents, scuffs, pore sizes on the coating surface.

2.4. The coating of the electrodes must be uniform, dense, durable, without swelling, sagging, tears and cracks, superficial hairline cracks are allowed.

2.5. On the surface of the electrode coating are allowed:

• pores with a maximum outer size of not more than 1.5 of the coating thickness (but not more than 2 mm) and a depth of not more than 50% of the coating thickness, provided that the number of pores does not exceed two per 100 mm of the electrode length;
• surface longitudinal hairline cracks and local mesh cracks in a total amount of not more than two per electrode with the length of each hairline crack or crack area not exceeding 10 mm.

2.6. Separate longitudinal scratches with a depth of not more than 25% of the coating thickness, as well as local dents with a depth of not more than 50% of the coating thickness, in the amount of not more than four, with a total length of up to 25 mm on one electrode, are allowed on the surface of the electrode coating.
Two local dents located on both sides of the electrode in the same cross section can be taken as one if their total depth does not exceed 50% of the coating thickness.

2.7. Local scuff marks on the coating surface are allowed if their depth does not exceed 25% of the coating thickness, and their number on one electrode is no more than two.

2.8. The difference in coating thickness in accordance with GOST 9466-75, when controlled with a micrometer, is determined in three longitudinally selected places of the electrode, offset one relative to the other by 50-100 mm in length and 120 degrees in circumference.

The measurement sites should be chosen in such a way that they fall on the central part of the electrode, i.e. retreating from each side of the electrode (from the contact part and its end) by at least 50 mm.

It is allowed to check the difference in coating thickness by other methods and special instruments using a non-destructive method (usually in the middle of the electrode length), which provide measurement accuracy with an error of 0.01 mm. In this case, it is necessary to carry out a specific brand of the device or its technical characteristics in the inspection report.

2.9. The difference in the thickness of the electrode coating should not exceed the values ​​indicated in the table. This table does not apply to electrodes supplied according to special specifications.

2.10. The coating must not be destroyed by free fall electrode flat on a smooth steel plate from high:

• 1m for electrodes with a diameter of 3.25 mm or less
• 0.25 m - for electrodes with a diameter of 4 mm or more.

In this case, partial chipping of the coating with a total length of up to 5% of the length of the coated part of the electrode is allowed.

Table 3.1 Permissible difference in thickness

Nominal electrode diameter, mm	Permissible coating thickness difference (mm) for different groups electrodes
2,0	0,090	0,080
2,5	0,115	0,100
3,0	0,135	0,120
4,0	0,180	0,160

2.11 When checking the welding and technological properties of the electrodes, the corresponding layer of the seam is welded, for which the controlled electrodes are intended.
Welding is performed in all spatial positions on coils cut from the same pipes for which the electrodes are intended, or similar to them.

2.12. The welding and technological properties of the electrodes, subject to the modes and conditions determined by the passport and technical specifications for electrodes of a particular brand, must meet the following requirements:

• The arc is easily (from the first ignition) excited and burns freely;
• The coating melts evenly, without excessive spatter (with the exception of electrodes with a cellulose type of coating), pieces falling off and the formation of a "visor" that prevents the normal melting of the electrode when welding in all spatial positions;
• The slag formed during welding ensures the normal formation of weld layers and is easily removed after cooling;
• The weld metal has no cracks and surface pores.

2.13. The allowable number of defects in welds is determined in accordance with the requirements of GOST.

2.14. On individual electrodes, the total number of which should not exceed 10% of those selected for testing, it is allowed:

• Increase in the number of pores on the coating surface up to three per 100 mm of the electrode length;
• Increase in the length of surface longitudinal hairline cracks and areas of local mesh cracking on the coating surface up to 15 mm;
• Increase in the total length of dents on the coating up to 37.5 mm;
• An increase in the length of the area exposed from the coating, adjacent to the contact end of the electrode protected from coating, up to 75% of the nominal diameter of the electrode, but not more than 3 mm;
• Increasing the number of local scuff marks on the coating surface to three.

2.15. If unsatisfactory results are obtained for the surface strength of the coating and the difference in the thickness of the coating of the electrodes, a re-check is carried out on twice the number of electrodes taken from the batch. The results of the retest are final and apply to the entire batch of electrodes as a whole.

2.16. Upon receipt of unsatisfactory results of checking the size and number of gas pores, repeated calcination (drying) of the controlled electrodes is allowed, followed by verification of this indicator.