RU2721162C1 - Stand for testing, calibration and calibration of in-line inspection instruments - Google Patents

Abstract

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention can be used for in-pipe diagnostics of oil pipelines and oil product pipelines. Essence of the invention consists in the fact that from the tendon for in-pipe inspection instruments contains at least two coils having the same outer diameter and different thickness of the walls. Each of the coils is coated with at least one artificial defect of one type, the geometrical dimensions of which are made with accuracy sufficient to ensure traceability to the state primary standard of the unit of length. Type of artificial defect is selected from a set of types of artificial defects of the outer surface, artificial defects of the inner surface, intra-wall artificial defects and artificial defects of the coil wall geometry. Each of the coils has the same number of artificial defects of the same types.

EFFECT: technical result is higher accuracy and reliability of measurement results performed by in-line inspection instrument during in-line diagnostics.

17 cl, 20 dwg, 1 tbl

Description

The invention relates to non-destructive testing methods, in particular to test benches (research, control, comparative, determinative, debugging, preliminary, acceptance, qualification, bearer, acceptance, periodic, inspection, standard, attestation, certification, bench, polygon, functional tests for type approval), calibration and verification of in-line inspection devices (hereinafter - VIP) used for in-line diagnostics of oil pipelines and oil product pipelines.

A known sample for non-destructive testing, made in the form of a body of a controlled material containing an artificial defect and at least one stepped groove with blunting, which is welded, characterized in that the sample is made in the form of a pipe, the artificial defect is made in a step on the back side cutting for welding in the form of a defect-forming groove simulating a real defect on the back of the weld of the product, while the width of the groove is equal to the sum of the shrinkage of the metal after welding and the width of the simulating re lingual defect in the product, and the depth and grooves and grooves are made variable at the end of the sample, oppositely changing relative to the dullness, which remains constant. The invention relates to ultrasonic testing of welded joints of various metals and alloys (patent RU 2235987 C1, IPC G01N 3/00, G01N 29/00, publication date: 09/10/2004).

Closest to the invention is a dry broach stand for testing the performance of a VIP at a test pipeline test site, disclosed in patent RU 2653138 C1, “Method for manufacturing a dry broach test bench for testing the performance of in-pipe inspection devices at a test pipeline test site”. The dry draw stand contains sections of the pipeline with natural defects from existing pipelines and sections of the pipeline with artificial defects applied to them, while the section of the pipeline with natural defects from the existing pipeline is cut so that the distance in the longitudinal direction from the edges of the defect to the edges of the coil is some a predetermined distance, and the deviation of the cut of the end of the coil from the perpendicular was no more than a predetermined size, the outer surface of the pipeline section is completely pure they are protected from all types of insulation, and the location of each defect present on the cut out section of the pipeline is circled with indelible paint by a closed line on the outer surface of the pipeline section corresponding to the defect outline, then on the outer surface of the coil is marked with indelible paint “POLIGON” (to indicate that the sections of the pipeline are intended for use at the test pipeline test site), the zero position in the pipeline ("0 °"), the direction of fluid flow, the name of the pipeline; the name of the pipeline section, the number of the defect, and the marking of the number of the defect is carried out in the immediate vicinity of the marked defect contour (patent RU 2653138 C1, IPC G01N 29/00, publication date: 05/07/2018).

The disadvantage of the above technical solutions is the impossibility of ensuring the required reliability of the measurement results performed by the VIP during in-line diagnostics, and, therefore, the possibility of distorting the interpretation of defects, due to the impossibility of establishing metrological traceability of a unit of physical quantity (length) stored and reproduced by standards (stands printed on them artificial defects), namely, artificial defects with normalized metrological and geometric x characteristics (length, width, depth), to working measuring instruments - VIP, implementing ultrasonic and magnetic measurement methods, as well as profilometry method.

An object of the invention is the creation of a stand for testing, checking and calibration of in-line inspection devices, providing the ability to test, calibrate and verify the VIP with the required reliability of the measurement results.

The technical result is to increase the accuracy and reliability of the measurement results performed by the VIP during in-line diagnosis.

The specified technical problem is solved, and the technical result is achieved by the fact that the stand for testing, verification and calibration of in-line inspection devices, characterized in that it contains at least two coils having the same outer diameter and different wall thickness, with each of the coils applied at least one artificial defect of one type, the geometric dimensions of which are made with an accuracy sufficient to ensure traceability to the state primary standard of unit length, the type of artificial defect is selected from the set of types of artificial defects of the external surface, artificial defects of the internal surface, internal wall defects, and artificial defects of the geometry of the coil wall, with the same number of artificial defects of the same types applied to each coil.

Each coil has the same number of artificial defects of the same types.

At least one of the coils contains at least one template with predetermined geometric dimensions with one artificial defect applied to it from a set of types of artificial defects of the outer surface, defects of the inner surface and intra-wall artificial defects.

Artificial defects of the same type are applied to the templates of at least two coils.

The types of man-made defects on the external and internal surfaces are general corrosion, or peptic corrosion, or longitudinal risk, or transverse risk, or pitting corrosion, or longitudinal risk, or transverse risk, or longitudinal crack, or transverse crack.

The geometric dimensions of artificial defects are selected from the following ranges:

- for general corrosion - length 3t, width 3t, depth from 0.08t to 0.15t;

- for ulcerative corrosion - length from t to 2t, width from t to 2t, depth from 0.13t to 0.4t;

- for longitudinal risks - length from 2t to 4t, width from 2t to 3t, depth from 0.1t to 0.4t;

- for transverse risks - length from 2t to 3t, width from 2t to 4t, depth from 0.1t to 0.4t;

- for pitting corrosion - diameter from 5 mm to t, depth from 0.8 mm to 0.5t;

- for longitudinal risks - length 2t, width 2t, depth 0.15t;

- for transverse risks - length 0.5t, width 2t, depth 0.1t;

- for a longitudinal crack - length 4t, width 0.5 mm, depth from 0.2t to 0.25t;

- for a transverse crack - length 0.5 mm, width 4t, depth from 0.2t to 0.25t;

where t is the value of the wall thickness of the coil.

Types of artificial intra-wall defects are inclusion or delamination.

The geometric dimensions of artificial defects are selected from the following ranges:

- for delamination - length from 25 to 50 mm, width from 25 to 50 mm, depth 0.4 mm,

- for inclusion - diameter 5 mm, depth 0.8 mm,

where t is the value of the wall thickness of the coil.

A type of artificial defect in the geometry of the coil wall is a dent.

The geometric dimensions of artificial defects are selected from the following ranges:

- for a dent - length from 150 to 250 mm, width from 150 to 200 mm, depth from 2.5 to 4 mm,

where t is the value of the wall thickness of the coil.

On each of at least two coils, two or more different types of artificial defects are applied, each of at least two coils containing the same number of artificial defects of each type.

Each of at least two coils contains at least two templates with various types of artificial defects applied to them, while each of at least two coils contains the same number of templates with artificial defects of each type.

The template is made with the following geometrical dimensions, which make it possible to accurately measure the artificial defects applied to it by the in-tube inspection device: the length of the template parallel to the axis of the coil is at least 700 mm, the width of the template along the circumference of the coil is at least 120 mm.

Each of the at least two coils is marked with a series of artificial defects from a set of types of artificial defects of the outer surface, artificial defects of the inner surface, internal wall defects and artificial defects of the geometry of the wall of the coil, while the standard series of artificial defects are applied to each of at least two coils, coincide in the number of types of applied artificial defects, and differ from each other in the size of the geometric dimensions of the artificial defects projects of the same type.

The stand is made with the possibility of flange or socket connection with the pipeline of the test site.

Coils are interconnected by a welded joint.

The template is welded to the coil.

The invention is illustrated by drawings, which show:

FIG. 1 is a General view of the stand with a standard-sized series of artificial defects deposited on the outer surface of the coils,

FIG. 2 is a General view of the stand, including two coils with artificial defects inside the wall of the coil,

FIG. 3 - section aa stand, including two coils with artificial defects inside the wall of the coil,

FIG. 4 is a General view of the stand, including five coils with artificial defects inside the wall of the coil,

FIG. 5 - section BB of the stand, including five coils with artificial defects inside the wall of the coil,

FIG. 6 is a General view of the stand with artificial defects deposited on the inner surface of the coils, as well as with artificial defects inside the coil wall,

FIG. 7 - section BB of the coil with the first wall thickness, on the inner surface of which artificial defects are applied, as well as with artificial defects inside the coil wall,

FIG. 8 is a section through a GG coil with a second wall thickness, on the inner surface of which artificial defects are applied, as well as with artificial defects inside the coil wall,

FIG. 9 is a section of a DD coil with a third wall thickness, on the inner surface of which artificial defects are applied, as well as with artificial defects inside the coil wall,

FIG. 10 is a cross-section EE of the stand, including flanges and coils with different wall thicknesses, on the inner surface of which artificial defects of the same size are applied, as well as with artificial defects of the same size inside the walls of the coils,

FIG. 11 is a General view of the stand, including two coils with artificial defects in the geometry of the wall of the coil,

FIG. 12 is a section of the Zh-Zh stand, including two coils with artificial defects in the geometry of the wall of the coil,

FIG. 13 is a General view of the coil with the installed template containing one artificial defect,

FIG. 14 is a section of an AND coil with an installed template containing one artificial defect,

FIG. 15 is a General view of the coil with an installed set of templates containing one artificial defect on the outer surface of the wall,

FIG. 16 is a section of a KK coil with an installed set of templates containing one artificial defect,

FIG. 17 is a General view of the coil with the installed template containing a set of artificial defects on the outer surface of the wall,

FIG. 18 is a section through an L-L coil with a mounted template containing a set of artificial defects on the outer surface of the wall,

FIG. 19 is a General view of the coil with an installed set of templates containing a set of artificial defects,

FIG. 20 is a section through an MM coil with an installed set of templates containing a set of artificial defects.

In the drawings, the positions have the following numerical designations:

1 - flange;

2-welded joint;

3 - coil;

4 - artificial defect;

5 - template;

6 - welded joint of the coil and the template.

The claimed stand (Fig. 1) is intended for research, control, comparative and other tests, verification and calibration of VIP, as well as to improve the methodology for interpreting data of in-line diagnostics of trunk pipelines. The stand (Fig. 1) for testing, verification and calibration of in-tube inspection devices is made with the possibility of flange or socket connections with the pipeline of the test site.

The stand may contain two (Fig. 2, 3) coils 3 or more (Fig. 4, 5), interconnected by a welded joint 2 - a transverse weld. The maximum number of coils 3 that can be part of the stand is determined based on the length of the section of the testing range of the in-line inspection device between the counter flanges of which the claimed stand is installed, and the outer diameter of the coils 3, which for the purposes of the present invention can be in the range 159-1220 mm In particular, coils 3 can be made with outer diameters of 159 mm; 219 mm; 325 mm; 377 mm; 426 mm; 530 mm; 630 mm; 720 mm 820 mm; 1020 mm; 1067 mm; 1220 mm. All coils 3 of the stand have the same outer diameter, and differ relative to each other by the wall thickness (Fig. 3, 5, 6). The wall thickness of the coils 3 is selected depending on the outer diameter of the coil 3 and is in the range from 4 to 27 mm.

Coils 3 are made of a material similar to the material of main oil pipelines and oil product pipelines subjected to in-line diagnostics using VIP.

On each coil 3, one or several artificial defects 4 can be applied, selected from a set of types of artificial defects of the outer surface (Fig. 1), artificial defects of the inner surface (Fig. 4, 5, 6, 7, 8, 9, 10), intra-wall artificial defects (Fig. 4, 5, 6, 7, 8, 9, 10) and artificial defects in the geometry of the wall of the coil 3 (Fig. 11, 12).

Artificial defects 4, deposited on the coil 3 of the stand, have geometric dimensions with standardized metrological characteristics due to the fact that they are made with accuracy sufficient to ensure traceability to the state primary standard unit of length. The characteristics of the geometric dimensions of artificial defects 4, namely, their length, width, depth and diameter, are normalized, because they have predefined manufacturing tolerances and boundaries of the reproduction error, and after application, the geometric dimensions of artificial defects 4 are verified in accordance with local verification schemes. As a consequence of this measure, the lengths of the geometric dimensions of artificial defects 4 are traceable to the state primary standard of unit length. This approach to the implementation of artificial defects 4, in contrast to the known analogues, allows to increase the accuracy and ensure the reliability of the measurement results performed by the VIP during in-line diagnostics.

Artificial defects 4 can be applied to the external (Fig. 1) and internal (Fig. 2, 3, 4, 5, 6, 7, 8, 9, 10) surface of the wall of the coil 3, or inside the wall of the coil 3 can be directly made intra-wall (Fig. 2, 3, 4, 5, 6, 7, 8, 9, 10) artificial defects 4, or artificial defects 4 of the geometry of the wall of the coil 3 (Fig. 11, 12).

In this case, an artificial defect 4 of the same type can be applied to the coil 3 of the stand with one geometric size (Fig. 6, 7, 8, 9, 10), or a standard series of artificial defects of the same type can be applied to the coil 3 (Fig. 11, 12) - several artificial defects 4 of the same type, differing from each other by values of geometric dimensions. In addition, several different types of artificial defects 4 can be applied to the coil 3 (Fig. 2, 3), each with one corresponding predetermined geometric size, or the size rows (Fig. 1) of each type of artificial defect 4 - for each of several types of artificial defects 4 caused by several artificial defects 4 of the same type, differing from each other by the values of geometric dimensions.

If a certain number of artificial defects 4 is applied to one of the coils 3 of the stand, then the same number of artificial defects 4 of the same types will be applied to all other coils 3, but the corresponding artificial defects 4 on different coils 3 can be performed as with the same values of geometric dimensions (Fig. 6, 7, 8, 9, 10), and with different (Fig. 2, 3).

Types of artificial defects 4, for which tests, verification and calibration of VIPs can be performed at the declared stand are listed below:

- types of defects of the external and internal surfaces: general corrosion (loss of metal), ulcerative corrosion (pitting), longitudinal risk (groove), transverse risk (groove), pitting (needle) corrosion, longitudinal risk (scoring, scratching), transverse risk ( scoring, scratch), longitudinal crack and transverse crack;

- types of intra-wall defects: inclusion and delamination;

- types of defects in the geometry of the coil wall: dent.

In this case, the geometric dimensions of artificial defects applied to one of at least two coils and / or to at least one template contained in it depend on the type of artificial defect and are selected from the following ranges:

- for general corrosion - length 3t, width 3t, depth from 0.08t to 0.15t;

- for ulcerative corrosion - length from t to 2t, width from t to 2t, depth from 0.13t to 0.4t;

- for longitudinal risks - length from 2t to 4t, width from 2t to 3t, depth from 0.1t to 0.4t;

- for transverse risks - length from 2t to 3t, width from 2t to 4t, depth from 0.1t to 0.4t;

- for pitting corrosion - diameter from 5 mm to t, depth from 0.8 mm to 0.5t;

- for longitudinal risks - length 2t, width 2t, depth 0.15t;

- for transverse risks - length 0.5t, width 2t, depth 0.1t;

- for a longitudinal crack - length 4t, width 0.5 mm, depth from 0.2t to 0.25t;

- for a transverse crack - length 0.5 mm, width 4t, depth from 0.2t to 0.25t;

- for a dent - length from 150 to 250 mm, width from 150 to 200 mm, depth from 2.5 to 4 mm;

- for delamination - length from 25 to 50 mm, width from 25 to 50 mm, depth 0.4 mm;

- for inclusion, a diameter of 5 mm, a depth of 0.8 mm, where t is the value of the wall thickness of the coil.

In addition to artificial defects 4 applied directly to the coils 3, each of them can contain one (Fig. 13, 14) or several (Fig. 15, 16) templates 5 with an artificial defect 4 of a certain type applied to each of them, selected from a set types of artificial defects 4 of the external surface, defects of the internal surface or internal wall-related defects 4. Artificial defects 4 applied to the templates 5 are also made with an accuracy sufficient to ensure traceability to the state primary standard Nice length.

The template 5 is a rectangular portion of the cut surface of the coil 3, which, after applying an artificial defect 4, is welded back into the coil 3. As a result of welding, a welded joint is formed between the template and the coil 6. The template 5 is cut from the surface of the coil 3 if it is impossible or difficult installation of coil 3 with high mass and overall dimensions on the coordinate tables of milling and drilling machines for applying artificial defects 4 to it with high accuracy. The sizes of the template 5 are chosen to ensure sufficient accuracy of the application of artificial defects 4 and depending on the technical characteristics of the coordinate tables of milling and drilling machines, but not less than 700 mm in length and from 120 to 450 mm in width, depending on the outer diameter of the coil 3. Application of technology cutting-welding of templates 5 provides the high accuracy of manufacturing artificial defects 4 required for the purposes of the invention for coils 3 of all external diameters used, sufficient to ensure traceability to state primary standard of unit of length.

The template 5 may contain both one artificial defect 4 (Fig. 13, 14) and a set (Fig. 17, 18) of artificial defects 4. Each coil 3 may contain several templates 5 on which various types are applied (Fig. 19 , 20) artificial defects 4. In addition, each coil 3 will contain the same number of templates with artificial defects 4 of the same type applied to them. The total number of templates 5, which can be placed on one coil 3, is determined based on the diameter of the coil 3 and does not exceed 4-5 depending on the diameter to ensure that the strength of the coil 3 is maintained during repeated tests.

Artificial defects 4 of the same type, applied to coils 3 and / or to the templates 5 contained therein, can be made with the same geometric dimensions (Fig. 6, 7, 8, 9, 10) on each coil 3, or can be made with different values of geometric dimensions (Fig. 2, 3) on different coils 3.

Each template 5 has geometric dimensions that enable accurate measurement of the VIP of the artificial defects applied to it 4. The geometric dimensions of the template 5 are selected based on the parameters of the tested VIP and the condition that when applying an artificial defect 4, the distance in the longitudinal direction from the edges of the artificial defect 4 to the edges of the template 5 ensured the accuracy of measuring the characteristics of the signal reflected from the artificial defect 4, and excluded the overlap of signals reflected from the suit sstvennogo defect 4 and a weld along the edge of platen 5. In order to satisfy these conditions templet is configured with the following geometrical dimensions: length of the platen parallel to the coil axis is less than 700 mm, the width of the platen along the coil circumference of at least 120 mm. In this case, the maximum values of the length and width of the template depend on the size of the coil on which it is placed.

The stand contains the number of artificial defects 4, sufficient to obtain a sample of measurement results over the entire range of measurements of VIP. The use of coils 3 with different wall thicknesses and the presence of artificial defects 4 in a wide range of geometric sizes in the test bench allows for accurate tuning and / or determination of VIP parameters in the entire range of VIP measurements, testing, calibration and calibration of VIPs.

The implementation of the stand of two coils 3 and the presence of an artificial defect 4 of the same type on each coil, ensures the accuracy and reliability of the measurement results performed by the VIP during in-line diagnostics, due to the fact that the coils 3 have different wall thicknesses, and the geometric dimensions of the artificial defects 4 are made with accuracy sufficient to transfer the VIP unit of length from the state primary standard of unit of length through a documented inextricable chain of calibrations, each of which contributes to eshnost measurements.

An increase in the number of coils 3 of the stand and the number of artificial defects 4 applied to them will further increase the accuracy and reliability of the measurement results performed by the VIP, as well as the completeness of the selection of measurement results obtained for one run of the VIP over the test site.

The geometric dimensions of artificial defects and tolerances for their manufacture are selected depending on the measurement errors required during testing, verification and calibration of the VIP, and are normalized, i.e. for them, the boundaries of the reproduction errors are established to ensure the transmission of a unit of length in accordance with local verification schemes from the state primary standard of a unit of length.

For the purposes of the present invention, any methods of manufacturing artificial defects 4 can be used that provide sufficient accuracy for the purposes of the present invention and compliance with the required error limits, for example, presented in table 1.

The claimed stand for testing, verification and calibration of in-line inspection devices works as follows.

In-line inspection device during testing (research, control, comparative, in order to confirm the type, etc.), calibration or verification is passed inside the declared stand. To do this, choose a stand consisting of coils 3 with an outer diameter corresponding to the size of the tested VIP. The stand is installed in a test site. During the pass, the VIP passes through the site with a stand, the metrological and geometric characteristics of artificial defects 4 of which are known and satisfy the traceability requirement for the state primary standard of unit length.

During the VIP pass, measurements are made by ultrasonic and magnetic methods, as well as by profilometry methods.

The ultrasound method measures the wall thickness of the coil 3, as well as the parameters of artificial defects 4, except for dents. The ultrasonic method is based on the registration of ultrasonic waves reflected from the interface between two media - the wall of the coil 3 or the surface of the artificial defect 4. The electronic unit measures the transit time of the ultrasonic signal and the amplitude of the reflected ultrasonic signal. Since the speed of the ultrasonic wave is known, by measuring the wave propagation time, the VIP electronic unit calculates the wall thickness of the coil 3 or the distance from the wall to the surface of the artificial defect 4 (depth of the artificial defect 4). Using the amplitude of the ultrasonic signal, the VIP electronic unit calculates the area of the artificial defect 4. The larger the amplitude, the larger the area of the artificial defect 4, since the energy of the reflected wave is proportional to the size of the artificial defect 4. Since the transducers are located on the entire working surface of the VIP with a slight overlap, the presence of the signal on the converters, the VIP electronic unit calculates the position of the artificial defect 4 around the circumference of the coil 3 and its boundary.

Magnetic method measures the wall thickness of the coil 3, as well as the parameters of artificial defects 4, except for dents. When measuring by the magnetic method, permanent magnets are used that create a magnetic field in the body of the coil 3, which brings the magnetization of the material of the wall of the coil 3 to the magnetization of technical saturation. During the movement of the VIP along the stand, sensors installed between the magnetic poles detect a change in magnetic flux. In the absence of artificial defect 4, the magnetic flux does not change. Depending on the size of the artificial defect 4, the magnetic flux proportionally changes. Since the sensors are located along the entire working surface of the VIP, the electronic unit of the VIP calculates the position of the artificial defect 4 around the circumference of the coil 3 and its boundary about the presence of a change in the magnetic flux on the sensors.

The profilometry method measures the inner diameter of the coil 3 and the geometric parameters of the dents. The profilometry measurements are performed by registering the deviation angle of the measuring levers (hereinafter referred to as the levers) uniformly distributed around the circumference of the measuring section of the VIP and having direct contact with the inner wall of the coil 3. Each of the levers of the profiler is connected to the angle sensor and changes its angular position independently leverage. Since the length of the lever is known, the distance from the surface of the coil to the point of attachment of the lever electronic unit VIP calculates by multiplying the length of the lever by the sine of the angle of deviation of the lever. Since the levers are located along the entire working surface of the VIP, the presence of a change in the angle of inclination of the levers can be judged on the position of the artificial defect 4 along the circumference of the coil 3 and its boundaries.

During the VIP pass through the stand, diagnostic information is written to its on-board information storage device, which, after the VIP pass through and its removal from the test site, is transferred to an external information storage device and decrypted using the VIP data interpretation program. Further, the information is analyzed in the hardware-software complex of information processing, which consists of units for verification, testing and calibration of VIP.

After testing, calibration or verification of VIPs, the following parameters of artificial defects are analyzed:

- the length of the artificial defect 4;

- the width of the artificial defect 4;

- the depth of the artificial defect 4;

- diameter of the artificial defect 4;

- wall thickness of the coil 3 in the area around the artificial defect 4;

- coordinate of the beginning of the artificial defect 4 along the axis of the coil 3;

- coordinate of the end of the artificial defect 4 along the axis of the coil 3;

- coordinate of the beginning of the artificial defect 4 around the circumference of the coil 3;

- coordinate of the end of the artificial defect 4 around the circumference of the coil 3.

The analysis consists in comparing the data from the test report, verification or calibration of the VIP with the data specified in the test protocol of the stand, namely, in comparison of the normalized geometric dimensions of the artificial defects 4 with the dimensions of the artificial defects obtained as a result of measurements of the VIP.

The presence in the declared stand of coils 3 with different thicknesses, as well as the presence of artificial defects 4 made in several geometric sizes and on the walls of coils of various thicknesses, allows you to collect several sets of measured parameters of artificial defects 4, and provides the results of tests, verification or Reed calibration with greater accuracy.

After testing, verifying or calibrating the VIP, upon receipt of unsatisfactory analysis data, it is concluded that it is advisable to additionally configure the VIP and conduct repeated tests, verification, or calibration. The presence in the stand of coils 3 with different thicknesses and / or artificial defects 4 in a wide range of geometric sizes allows for testing to fine-tune the metrological characteristics of the VIP in the entire measurement range. Since the geometric dimensions of artificial defects are normalized, the claimed stand provides traceability of metrological characteristics of VIP to the state primary standard of unit length.

Claims (32)

1. Test bench for testing, calibration and calibration of in-line inspection instruments, characterized in that it contains at least two coils having the same outer diameter and different wall thicknesses, with at least one artificial defect of the same type applied to each coil, geometric the dimensions of which are made with an accuracy sufficient to ensure traceability to the state primary standard of a unit of length, while the type of artificial defect is selected from a set of types of artificial defects external surface, artificial defects of the internal surface, internal wall artificial defects and artificial defects in the geometry of the wall of the coil, with each of the coils caused the same number of artificial defects of the same types. 2. The stand according to claim 1, characterized in that on each of the coils the same number of artificial defects of the same types are applied. 3. The stand according to claim 1, characterized in that at least one of the coils contains at least one template with predetermined geometric dimensions with one artificial defect applied to it from a set of types of artificial defects of the outer surface, defects of the inner surface and inner wall artificial defects. 4. The stand according to claim 3, characterized in that artificial defects of the same type are applied to the templates of at least two coils. 5. The stand according to claim 1 or 3, characterized in that the types of artificial defects of the external and internal surfaces are general corrosion, or ulcerative corrosion, or longitudinal risk, or transverse risk, or pitting corrosion, or longitudinal risk, or transverse risk, or longitudinal crack, or transverse crack. 6. The stand according to claim 5, characterized in that the geometric dimensions of the artificial defects are selected from the following ranges: - for general corrosion - length 3t, width 3t, depth from 0.08t to 0.15t; - for ulcerative corrosion - length from t to 2t, width from t to 2t, depth from 0.13t to 0.4t; - for longitudinal risks - length from 2t to 4t, width from 2t to 3t, depth from 0.1t to 0.4t; - for transverse risks - length from 2t to 3t, width from 2t to 4t, depth from 0.1t to 0.4t; - for pitting corrosion - diameter from 5 mm to t, depth from 0.8 mm to 0.5t; - for longitudinal risks - length 2t, width 2t, depth 0.15t; - for transverse risks - length 0.5t, width 2t, depth 0.1t; - for a longitudinal crack - length 4t, width 0.5 mm, depth from 0.2t to 0.25t; - for a transverse crack - length 0.5 mm, width 4t, depth from 0.2t to 0.25t; where t is the value of the wall thickness of the coil. 7. The stand according to claim 1 or 3, characterized in that the types of artificial intra-wall defects are inclusion or delamination. 8. The stand according to claim 7, characterized in that the geometric dimensions of the artificial defects are selected from the following ranges: - for delamination - length from 25 to 50 mm, width from 25 to 50 mm, depth 0.4 mm, - for inclusion - diameter 5 mm, depth 0.8 mm, where t is the value of the wall thickness of the coil. 9. The stand according to claim 1, characterized in that the type of artificial defect in the geometry of the coil wall is a dent. 10. The stand according to claim 9, characterized in that the geometric dimensions of the artificial defects are selected from the following ranges: - for a dent - length from 150 to 250 mm, width from 150 to 200 mm, depth from 2.5 to 4 mm, where t is the value of the wall thickness of the coil. 11. The stand according to claim 1, characterized in that on each of at least two coils two or more different types of artificial defects are applied, each of at least two coils containing the same number of artificial defects of each type. 12. The stand according to claim 3, characterized in that each of at least two coils contains at least two templates with various types of artificial defects applied to them, while each of at least two coils contains the same number of templates with artificial defects each type. 13. The stand according to claim 3, characterized in that the template is made with the following geometrical dimensions, making it possible to accurately measure the artificial defects applied to it by the in-line inspection device: the length of the template parallel to the axis of the coil is at least 700 mm, the width of the template along the circumference of the coil is at least 120 mm. 14. The stand according to claim 1, characterized in that each of the at least two coils is marked with a series of artificial defects from a set of types of artificial defects of the outer surface, artificial defects of the inner surface, internal wall defects and artificial defects of the geometry of the coil wall, standard-sized rows of artificial defects deposited on each of at least two coils coincide in the number of types of applied artificial defects and differ from each other by the value of geometric ble artificial defect sizes identical types. 15. The stand under item 1, characterized in that it is made with the possibility of flange or socket connections with the pipeline of the test site. 16. The stand according to claim 13, characterized in that the coils are interconnected by a welded joint. 17. The stand according to claim 2, characterized in that the template is connected to the coil by a welded joint.

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