Method and device for evaluating hydrogen embrittlement sensitivity of pipeline in hydrogen-doped environment and computer equipment

Abstract

The embodiment of the specification provides a hydrogen environment under the pipeline hydrogen embrittlement sensitivity evaluation method, device and computer equipment, including obtaining the test data of the slow tensile test of the weld sample and the base material sample; according to the test data of the weld sample and the base material sample, the weld mechanical property loss degree and the base material mechanical property loss degree are obtained; according to the hydrogen doping ratio, the tensile strength and the yield strength, the mixed correction factor is obtained; according to the weld mechanical property loss degree, the base material mechanical property loss degree, the mixed correction factor and the hydrogen doping ratio, the hydrogen embrittlement sensitivity risk index is calculated to obtain the hydrogen embrittlement sensitivity evaluation grade of the pipeline to be evaluated. The method comprehensively considers the strength index and plasticity index, fully considers the mechanical property loss of the pipeline base material and weld under the hydrogen doping environment; and the influence proportion of the pipeline base material and weld is quantified by introducing the mixed correction factor, which is helpful to improve the accuracy of the pipeline hydrogen embrittlement sensitivity evaluation, and provides a reliable basis for the safety control of the pipeline under the hydrogen doping environment.

Description

Technical Field

[0001] The embodiments in this specification relate to the field of energy transportation technology, and in particular to a method, apparatus, and computer equipment for evaluating the hydrogen embrittlement sensitivity of pipelines in a hydrogen-doped environment. Background Technology

[0002] In the current energy structure, fossil fuels (coal and oil) still account for as much as 84% ​​of the energy consumption, while carbon-free energy accounts for less than one-fifth. Rapid societal development has accelerated energy consumption, exacerbating the supply pressures and environmental problems associated with traditional fossil fuel consumption. The non-renewable nature of fossil fuels poses a significant threat to sustainable development, and the massive emissions of carbon dioxide have caused a chain reaction of harmful accidents. Therefore, vigorously developing renewable energy and improving its share of energy consumption is particularly important. Hydrogen energy, as a highly efficient and clean energy source, has begun to receive attention and is developing rapidly.

[0003] Currently, although there are many methods for evaluating the hydrogen embrittlement sensitivity of pipelines in hydrogen-doped environments, they suffer from drawbacks such as limited evaluation objects and indicators, failing to establish an effective correlation. Furthermore, the evaluation objects are limited to either the pipeline base material or the pipeline weld, and the evaluation indicators are limited to either strength or plasticity. This results in significant differences in the characterization of hydrogen embrittlement sensitivity of the pipe material depending on the evaluation objects and indicators, leading to inaccurate hydrogen embrittlement sensitivity results.

[0004] In view of this, the embodiments of this specification aim to provide a method, apparatus and computer equipment for evaluating the hydrogen embrittlement sensitivity of pipelines in a hydrogen-doped environment. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, the purpose of the embodiments in this specification is to provide a method, apparatus, and computer device for evaluating the hydrogen embrittlement sensitivity of pipelines in a hydrogen-doped environment, so as to solve the problem that the existing methods for evaluating hydrogen embrittlement sensitivity are not comprehensive enough, resulting in inaccurate evaluation results.

[0006] To solve the above-mentioned technical problems, the specific technical solutions of the embodiments in this specification are as follows:

[0007] Firstly, embodiments of this specification provide a method for evaluating the hydrogen embrittlement sensitivity of pipelines in a hydrogen-doped environment, including:

[0008] Test data for slow tensile testing of weld specimens and base metal specimens were obtained separately. The test data included the reduction of area, tensile strength and yield strength. The weld specimens and the base metal specimens were obtained from the pipeline to be evaluated.

[0009] Based on the test data of the weld sample, the degree of reduction in the mechanical properties of the weld is calculated, and based on the test data of the base material sample, the degree of reduction in the mechanical properties of the base material is calculated.

[0010] The mixing correction factor is calculated based on the hydrogen doping ratio, the tensile strength, and the yield strength.

[0011] The hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated is calculated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor, and the hydrogen doping ratio.

[0012] Based on the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity evaluation level of the pipeline to be evaluated is obtained.

[0013] Furthermore, test data for slow tensile testing of weld specimens and base metal specimens were obtained separately, including:

[0014] The weld specimens were subjected to slow tensile tests in hydrogen-doped and hydrogen-free environments, respectively, to obtain the first stress-strain curve in the hydrogen-doped environment and the second stress-strain curve in the hydrogen-free environment.

[0015] Based on the first stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-doped environment are obtained, and based on the second stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-free environment are obtained.

[0016] The cross-sectional shrinkage rate under hydrogen-doped environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-doped environment; and the cross-sectional shrinkage rate under hydrogen-free environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-free environment.

[0017] The parent material sample was subjected to slow tensile tests in a hydrogen-doped environment and a hydrogen-free environment, respectively, to obtain the third stress-strain curve in the hydrogen-doped environment and the fourth stress-strain curve in the hydrogen-free environment.

[0018] Based on the third stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-doped environment are obtained, and based on the fourth stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-free environment are obtained.

[0019] The cross-sectional shrinkage rate under hydrogen-doped conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-doped conditions. Similarly, the cross-sectional shrinkage rate under hydrogen-free conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-free conditions.

[0020] Specifically, the degree of reduction in the mechanical properties of the weld is calculated according to the following formula:

[0021]

[0022] Where a1 represents the degree of reduction in the mechanical properties of the weld, in percentage; The cross-sectional shrinkage rate of the weld specimen under hydrogen-doped environment, in %; The cross-sectional shrinkage rate of the weld specimen in a hydrogen-free environment, in %; , where is the yield strength of the weld specimen in a hydrogen-doped environment, in MPa; The yield strength of the weld specimen in a hydrogen-free environment, in MPa; The tensile strength of the weld specimen in a hydrogen-doped environment is expressed in MPa. The tensile strength of the weld specimen in a hydrogen-free environment, in MPa;

[0023] The degree of reduction in the mechanical properties of the base material is calculated using the following formula:

[0024]

[0025] Where a2 represents the degree of reduction in the mechanical properties of the parent material, in percentage; The cross-sectional shrinkage rate of the parent material sample under hydrogen-doped environment, in %; The cross-sectional shrinkage rate of the parent material sample under hydrogen-free conditions, in %; , where is the yield strength of the parent material sample under hydrogen-doped conditions, in MPa; , where is the yield strength of the parent material sample in a hydrogen-free environment, in MPa; , where is the tensile strength of the parent material sample under hydrogen-doped conditions, in MPa; , where represents the tensile strength of the parent material sample in a hydrogen-free environment, in MPa.

[0026] Furthermore, the hybrid correction factor is calculated according to the following formula:

[0027]

[0028] Where η is the mixing correction factor; τ is the hydrogen doping ratio (volume percentage), %.

[0029] Furthermore, the hydrogen embrittlement sensitivity risk index is calculated according to the following formula:

[0030] λ=[(1-η)a1+ηa2]·(τe 3.536 );

[0031] Wherein, λ is the pipeline hydrogen embrittlement sensitivity risk index; a1 is the degree of mechanical property reduction of the weld, %; a2 is the degree of mechanical property reduction of the base material, %; η is the mixing correction factor; and τ is the hydrogen doping ratio (volume percentage), %.

[0032] Specifically, based on the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated is obtained, including:

[0033] Determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset first threshold;

[0034] If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the first risk level;

[0035] If not, determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset second threshold;

[0036] If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the second risk level;

[0037] If not, then determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset third threshold;

[0038] If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the third risk level;

[0039] If not, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at risk level four.

[0040] The risk increases progressively from the first risk level to the second risk level, the third risk level, and the fourth risk level.

[0041] Preferably, the step of obtaining the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index further comprises:

[0042] Obtain the roughness of the pipe to be evaluated;

[0043] Based on the roughness and the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity evaluation result of the pipeline to be evaluated is obtained.

[0044] Secondly, embodiments of this specification provide a pipeline hydrogen embrittlement sensitivity evaluation device under hydrogen-doped environment, comprising:

[0045] The test data acquisition module is used to obtain test data of slow tensile test of weld specimen and base material specimen respectively. The test data includes the reduction of section, tensile strength and yield strength. The weld specimen and the base material specimen are obtained from the pipeline to be evaluated.

[0046] The mechanical property reduction calculation module is used to calculate the degree of mechanical property reduction of the weld based on the test data of the weld sample, and to calculate the degree of mechanical property reduction of the base material based on the test data of the base material sample.

[0047] The hybrid correction factor calculation module is used to calculate the hybrid correction factor based on the hydrogen doping ratio, the tensile strength, and the yield strength.

[0048] The hydrogen embrittlement sensitivity risk index calculation module is used to calculate the hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor, and the hydrogen doping ratio.

[0049] The evaluation module is used to obtain the hydrogen embrittlement sensitivity evaluation level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index.

[0050] Thirdly, embodiments of this specification provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method provided by the above-described technical solution.

[0051] Fourthly, embodiments of this specification provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method provided by the above-described technical solution.

[0052] Fifthly, embodiments of this specification provide a computer program product, including at least one instruction or at least one program segment, wherein the at least one instruction or the at least one program segment is loaded and executed by a processor to implement the method provided by the above-described technical solution.

[0053] By adopting the above technical solution, the method, apparatus, and computer equipment for evaluating the hydrogen embrittlement sensitivity of pipelines in hydrogen-doped environments provided in the embodiments of this specification can comprehensively consider the reduction in mechanical properties of the pipeline base material and welds under hydrogen-doped environments. In the calculation of material mechanical property reduction, the influence of strength and plasticity indices is fully considered, and the evaluation parameters are more comprehensive. Furthermore, a hybrid correction factor is introduced to accurately quantify the weight of the influence of the hydrogen doping ratio on the pipeline base material and pipeline welds, which is conducive to improving the accuracy of evaluating the hydrogen embrittlement sensitivity of pipelines in hydrogen-doped environments and providing a reliable basis for the safety management and control of pipelines and equipment under hydrogen-doped environments.

[0054] To make the above and other objects, features and advantages of the embodiments of this specification more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This document illustrates a step-by-step diagram of a pipeline hydrogen embrittlement sensitivity evaluation method provided in an embodiment of this specification.

[0057] Figure 2 A schematic diagram of obtaining weld samples and base material samples from the pipeline to be evaluated;

[0058] Figure 3(a) and Figure 3(b) are schematic diagrams of the specimen before and after the slow tensile test, respectively.

[0059] Figure 4 The diagram illustrates the steps for obtaining test data for slow tensile tests on weld specimens and base material specimens, respectively, in embodiments of this specification.

[0060] Figure 5(a) and Figure 5(b) are schematic diagrams of the stress-strain curves of the weld specimen and the base material specimen under a certain environment, respectively.

[0061] Figure 6 This document illustrates the steps involved in obtaining the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index in an embodiment of this specification.

[0062] Figure 7 This is a schematic diagram showing the sample dimensions in Examples 1 to 3;

[0063] Figure 8(a) and Figure 8(b) are the stress-strain curves of the weld specimen and the base material specimen in Example 1, respectively.

[0064] Figures 9(a) and 9(b) are the stress-strain curves of the weld specimen and the base material specimen in Example 2, respectively.

[0065] Figure 10(a) and Figure 10(b) are the stress-strain curves of the weld specimen and the base material specimen in Example 3, respectively.

[0066] Figure 11 This specification shows a schematic diagram of a pipeline hydrogen embrittlement sensitivity evaluation device provided in an embodiment of the present specification.

[0067] Figure 12 A schematic diagram of the structure of a computer device provided in an embodiment of this specification is shown.

[0068] Explanation of symbols in the attached drawings:

[0069] 20. Pipelines to be evaluated;

[0070] 21. Weld seam specimen;

[0071] 22. Base material sample;

[0072] 1110. Test data acquisition module;

[0073] 1120. Module for calculating the degree of mechanical performance reduction;

[0074] 1130. Hybrid Correction Factor Calculation Module;

[0075] 1140. Hydrogen embrittlement sensitivity risk index calculation module;

[0076] 1150. Evaluation Module;

[0077] 1202. Computer equipment;

[0078] 1204, Processor;

[0079] 1206. Memory;

[0080] 1208. Drive mechanism;

[0081] 1210. Input / output module;

[0082] 1212. Input devices;

[0083] 1214. Output devices;

[0084] 1216. Presentation equipment;

[0085] 1218. Graphical User Interface;

[0086] 1220. Network interface;

[0087] 1222. Communication link;

[0088] 1224. Communication bus. Detailed Implementation

[0089] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0090] It should be noted that the terms "first," "second," etc., used in this specification, claims, and the foregoing drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0091] To address the aforementioned issues, this specification provides a method for evaluating the hydrogen embrittlement sensitivity of pipelines in a hydrogen-doped environment. This method solves the problem that existing methods for evaluating hydrogen embrittlement sensitivity are not comprehensive enough, resulting in inaccurate evaluation results. Figure 1 This diagram illustrates the steps of a method for evaluating the hydrogen embrittlement sensitivity of a pipeline in a hydrogen-doped environment, as provided in the embodiments of this specification. This specification provides the operational steps of the method described in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operational steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual system or device products, the methods shown in the embodiments or drawings can be executed sequentially or in parallel. Specifically, as shown in the attached diagrams... Figure 1 As shown, the method may include:

[0092] S110: Obtain test data for slow tensile testing of weld specimens and base material specimens, respectively. The test data includes the reduction of area, tensile strength and yield strength. The weld specimens and the base material specimens are obtained from the pipeline to be evaluated.

[0093] like Figure 2 The diagram shows the process of obtaining weld samples and base material samples from the pipeline to be evaluated. Both weld samples 21 and base material samples 22 are taken along the axial direction of the pipeline 20 to be evaluated, with the weld of the pipeline 20 to be evaluated located in the middle of the weld sample 21.

[0094] Multiple weld seam specimens and base metal specimens are prepared. After processing such as cutting and grinding, each specimen undergoes a slow tensile test. Figure 3(a) shows a schematic diagram of the specimen before the slow tensile test; Figure 3(b) shows a schematic diagram of the specimen after the slow tensile test. The threads at both ends of the specimen are used to clamp the specimen in the slow tensile testing device to ensure the stability of the specimen clamping during the slow tensile test. In the embodiments of this specification, the total length of the specimen (denoted as L) is... tThe gauge length (denoted as d0) is in the range of 4 to 7 mm, within the range of 65 to 80 mm. Both the weld specimen and the base metal specimen are cylindrical (i.e., as shown in Figures 3(a) and 3(b), the side view of the specimen is circular).

[0095] Where d0 is the diameter of the gauge section; d is the diameter of the fixed end; d u Where m is the diameter of the cut surface; R is the thread length; L is the circumferential radius; c L is the gauge length. t L is the total length of the sample; u This is the gauge length after the break.

[0096] S120: Based on the test data of the weld sample, calculate the degree of reduction in the mechanical properties of the weld, and based on the test data of the base material sample, calculate the degree of reduction in the mechanical properties of the base material.

[0097] In the embodiments of this specification, the degree of reduction in the computational mechanical properties of the base material and the weld is calculated separately, thereby comprehensively evaluating the impact of the hydrogen-doped environment on the hydrogen embrittlement sensitivity of the pipeline.

[0098] S130: The mixing correction factor is calculated based on the hydrogen doping ratio, the tensile strength, and the yield strength.

[0099] The hybrid correction factor is the ratio between the degree of reduction in the mechanical properties of the base material and the degree of reduction in the mechanical properties of the weld. In the embodiments of this specification, the hybrid correction factor is calculated based on strength indicators including tensile strength and yield strength and hydrogen doping ratio. This can accurately quantify the impact of the hydrogen doping environment on the pipeline base material and pipeline weld, thereby improving the accuracy of subsequent calculations of the pipeline hydrogen embrittlement sensitivity risk index.

[0100] S140: The hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated is calculated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor, and the hydrogen doping ratio.

[0101] S150: Based on the hydrogen embrittlement sensitivity risk index, obtain the hydrogen embrittlement sensitivity evaluation level of the pipeline to be evaluated.

[0102] The embodiments of this specification provide a method for evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments. This method comprehensively considers the reduction in mechanical properties of the pipeline base material and welds under hydrogen-doped environments. In the calculation of material mechanical property reduction, the influence of strength and plasticity indices is fully considered, resulting in more comprehensive evaluation parameters. Furthermore, a hybrid correction factor is introduced to more accurately quantify the weight of the hydrogen doping ratio on the pipeline base material and welds. This method helps improve the accuracy of evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments and provides a reliable basis for the safety management of pipelines and equipment under hydrogen-doped environments.

[0103] like Figure 4 As shown in the embodiments of this specification, step S110, obtaining the test data of the slow tensile test of the weld specimen and the base material specimen respectively, further comprises:

[0104] S410: The weld specimen is placed in a hydrogen-doped environment and a hydrogen-free environment for slow tensile testing to obtain the first stress-strain curve in the hydrogen-doped environment and the second stress-strain curve in the hydrogen-free environment.

[0105] This involves obtaining multiple weld samples from the pipeline to be evaluated, and conducting tests in both hydrogen-doped and hydrogen-free environments. Furthermore, multiple weld samples can be tested repeatedly to synthesize the test data and determine the degree of mechanical property reduction in the welds of the pipeline under evaluation. Similarly, the degree of mechanical property reduction in the base material of the pipeline under evaluation can be determined by synthesizing the test data from multiple base material samples, thereby improving the accuracy of the hydrogen embrittlement sensitivity risk index calculation. In the embodiments of this specification, the hydrogen-free environment can be a nitrogen environment.

[0106] S420: Based on the first stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-doped environment are obtained, and based on the second stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-free environment are obtained.

[0107] Figure 5(a) shows a schematic diagram of the stress-strain curve of a weld specimen under a certain environment. For weld specimens, their stress-strain curves can be divided into four stages: the elastic stage, the yield stage (in this stage, the stress change tends to be gradual, which is called the yield plateau), the strengthening stage, and the necking stage (the right end of the necking stage corresponds to the specimen fracture, and the test ends).

[0108] In the embodiments of this specification, the stress at the yield stage in the stress-strain curve is taken as the yield strength of the weld specimen under this environment, and the stress at which the maximum value is obtained (i.e. the highest point of the stress-strain curve) is taken as the tensile strength of the weld specimen under this environment.

[0109] S430: Based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length of the weld specimen in a hydrogen-doped environment, the section shrinkage rate in a hydrogen-doped environment is obtained; and based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length of the weld specimen in a hydrogen-free environment, the section shrinkage rate in a hydrogen-free environment is obtained.

[0110] That is, the cross-sectional shrinkage rate can be calculated using the following formula:

[0111]

[0112] Where S is the reduction of area, and S0 is the original cross-sectional area of ​​the gauge length of the specimen, that is, the cross-sectional area of ​​the gauge length of the specimen before the slow tensile test, then S0 = 0.25πd0 2 d0 is the diameter of the gauge length segment; S u S is the cross-sectional area of ​​the gauge length of the specimen after the slow tensile test, which is also the diameter of the gauge length after the test. u =0.25πd u 2 d u The diameter is the fracture surface.

[0113] In summary, the test data for the weld specimen can be obtained.

[0114] S440: The parent material sample is subjected to slow tensile testing in a hydrogen-doped environment and a hydrogen-free environment, respectively, to obtain the third stress-strain curve in the hydrogen-doped environment and the fourth stress-strain curve in the hydrogen-free environment.

[0115] The hydrogen-free environment here should be the same as the hydrogen-free environment used for testing the weld sample, which is a nitrogen environment.

[0116] S450: Based on the third stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-doped environment are obtained, and based on the fourth stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-free environment are obtained.

[0117] Figure 5(b) shows a schematic diagram of the stress-strain curve of the base material specimen under a certain environment. For the base material specimen, its stress-strain curve does not have a clear yield plateau. Therefore, the stress value that produces 0.2% residual deformation should be taken as the yield strength of the base material specimen under this environment, and the stress at which the maximum value (i.e., the highest point of the stress-strain curve) is obtained should be taken as the tensile strength of the base material specimen under this environment.

[0118] S460: Based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-doped conditions, the cross-sectional shrinkage rate under hydrogen-doped conditions is obtained; and based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-free conditions, the cross-sectional shrinkage rate under hydrogen-free conditions is obtained.

[0119] The calculation of the reduction of area (R&A) of the base metal specimen is the same as that of the weld specimen, and will not be repeated here. In summary, the various test data for the base metal specimen can be obtained.

[0120] It should be noted that the step of performing a slow tensile test on the base material sample to obtain test parameters is not limited to being performed after the step of performing a slow tensile test on the weld sample to obtain test parameters. That is, steps S410 to S430 and steps S440 to S460 can be performed in parallel, or steps S440 to S460 can be performed before steps S410 to S430.

[0121] In this specification, the degree of reduction in the mechanical properties of the weld is calculated using the following formula:

[0122]

[0123] Where a1 represents the degree of reduction in the mechanical properties of the weld, in percentage; The cross-sectional shrinkage rate of the weld specimen under hydrogen-doped environment, in %; The cross-sectional shrinkage rate of the weld specimen in a hydrogen-free environment, in %; , where is the yield strength of the weld specimen in a hydrogen-doped environment, in MPa; The yield strength of the weld specimen in a hydrogen-free environment, in MPa; The tensile strength of the weld specimen in a hydrogen-doped environment is expressed in MPa. The tensile strength of the weld specimen in a hydrogen-free environment, in MPa;

[0124] The degree of reduction in the mechanical properties of the base material is calculated using the following formula:

[0125]

[0126] Where a2 represents the degree of reduction in the mechanical properties of the parent material, in percentage; The cross-sectional shrinkage rate of the parent material sample under hydrogen-doped environment, in %; The cross-sectional shrinkage rate of the parent material sample under hydrogen-free conditions, in %; , where is the yield strength of the parent material sample under hydrogen-doped conditions, in MPa; , where is the yield strength of the parent material sample in a hydrogen-free environment, in MPa; , where is the tensile strength of the parent material sample under hydrogen-doped conditions, in MPa; , where represents the tensile strength of the parent material sample in a hydrogen-free environment, in MPa.

[0127] By using the plasticity index of cross-sectional reduction rate, as well as strength indices including yield strength and tensile strength, the degree of mechanical property reduction can be calculated. The parameters are more comprehensive, which can improve the accuracy of calculating the degree of mechanical property reduction of the weld specimens and base material specimens of the pipeline to be evaluated.

[0128] Furthermore, in the embodiments of this specification, the hybrid correction factor is calculated according to the following formula:

[0129]

[0130] Where η is the mixing correction factor; τ is the hydrogen doping ratio (volume percentage), %.

[0131] Furthermore, the hydrogen embrittlement sensitivity risk index is calculated according to the following formula:

[0132] λ=[(1-η)a1+ηa2]·(τe 3.536 (4)

[0133] Wherein, λ is the pipeline hydrogen embrittlement sensitivity risk index; a1 is the degree of mechanical property reduction of the weld, %; a2 is the degree of mechanical property reduction of the base material, %; η is the mixing correction factor; and τ is the hydrogen doping ratio (volume percentage), %.

[0134] like Figure 6 As shown in the embodiments of this specification, step S150: obtaining the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index may include the following steps:

[0135] S610: Determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset first threshold;

[0136] S620: If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the first risk level;

[0137] S630: If not, determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset second threshold;

[0138] S640: If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the second risk level;

[0139] S650: If not, determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset third threshold;

[0140] S660: If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the third risk level;

[0141] S670: If not, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at risk level four.

[0142] The risk levels increase progressively from the first risk level to the second risk level, the third risk level, and the fourth risk level.

[0143] For example, the first threshold can be set to 1, the second threshold can be set to 5, and the third threshold can be set to 8; correspondingly, the first risk level is no risk, the second risk level is low risk, the third risk level is medium risk, and the fourth risk level is high risk. The hydrogen embrittlement sensitivity risk index and risk levels are shown in Table 1 below:

[0144] Table 1. Comparison of Hydrogen Embrittlement Sensitivity Risk Index and Risk Level

[0145] 0～1 Risk-free 1～5 Low risk 5～8 Medium risk ＞8 High risk

[0146] The pipeline hydrogen embrittlement sensitivity evaluation method provided in the embodiments of this specification can quantify the hydrogen embrittlement sensitivity of pipelines in hydrogen-doped environments into risk levels, thereby providing technicians with a more intuitive basis for safety management.

[0147] In a preferred embodiment, step S150: obtaining the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index, may further include:

[0148] Obtain the roughness of the pipe to be evaluated;

[0149] Based on the roughness and the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity evaluation result of the pipeline to be evaluated is obtained.

[0150] Generally, the higher the roughness of a pipeline, the larger its hydrogen embrittlement sensitivity risk index value, and the higher the risk level. Therefore, in some feasible embodiments, a weighting coefficient can be calculated based on the pipeline roughness; then, the weighting coefficient is multiplied by the hydrogen embrittlement sensitivity risk index, and the final hydrogen embrittlement sensitivity evaluation result is determined based on the risk index obtained from the multiplication.

[0151] Example 1

[0152] ① An X80 pipe from a natural pipeline network was selected as the test object. The specifications of the X80 pipe are Φ1219×16mm. Both the base material sample and the weld sample were cut from the axial direction of the in-service pipe, with the pipe weld located at the center of the weld sample. Wire cutting was used for sampling, and the sample shape was a cubic strip.

[0153] ② Design the dimensions of the round bar specimen according to standard GB / T 228.1. The total length of the specimen is 76 mm, and the diameter is 5 mm. The dimensions of the specimen are as follows: Figure 7 As shown, the surface roughness of the sample is 0.4, and the thread specification is M10.

[0154] ③ Determine the hydrogen doping conditions for the test: hydrogen doping ratio = 50%, ambient pressure = 10 MPa; the tensile rate is 0.0075 mm / min. Design a control group experiment: a nitrogen environment without hydrogen, ambient pressure = 10 MPa, and a consistent tensile rate. Tensile tests were conducted in both hydrogen-doped and hydrogen-free environments for both weld specimens and base metal experiments.

[0155] ④ During the test, the mechanical parameters of the samples were monitored, and the stress-strain curves of the weld sample and the base metal sample were obtained as shown in Figure 8(a) and Figure 8(b). The results showed that the yield strength and tensile strength of the weld sample in a hydrogen-doped environment were 467 MPa and 583 MPa, respectively, and in a hydrogen-free environment, they were 508 MPa and 645 MPa, respectively. The yield strength and tensile strength of the base metal sample in a hydrogen-doped environment were 612 MPa and 679 MPa, respectively, and in a hydrogen-free environment, they were 636 MPa and 727 MPa, respectively.

[0156] After the test, the plasticity of the specimens was measured. The results showed that the section reduction rate of the weld specimen was 15.34% in a hydrogen-doped environment and 24.98% in a hydrogen-free environment; and the section reduction rate of the base metal specimen was 25.67% in a hydrogen-doped environment and 36.56% in a hydrogen-free environment.

[0157] Further calculations revealed the following reductions in the mechanical properties of the weld and the base metal:

[0158]

[0159] The mixed correction factor is:

[0160]

[0161] Ultimately, the hydrogen embrittlement sensitivity risk index is:

[0162] λ=[(1-η)a1+ηa2]·(τe 3.536 )

[0163] = [(1-0.3384)×0.4408+0.3384×0.3350]×(0.5×e 3.536 )

[0164] =6.80

[0165] According to Table 1 of the hydrogen embrittlement sensitivity risk index, the following conclusion can be drawn: Under the conditions of 50% hydrogen content and an ambient pressure of 10 MPa, the X80 pipeline is at a medium risk level during service and requires a certain degree of attention.

[0166] Example 2

[0167] ① An X80 pipe in a natural pipe network was selected as the test object. The specifications of the X80 pipe are: Φ1219×16mm. Both the weld specimen and the base material specimen were cut from the axial direction of the in-service pipe, with the pipe weld located at the center of the weld specimen.

[0168] ② The dimensions of the round bar specimen were designed according to standard GB / T 228.1. The total length of the specimen was 76 mm, and the diameter was maintained at 5 mm. The specimen dimensions were the same as those in Example 1, and the surface roughness of the specimen was 0.4.

[0169] ③ Determine the hydrogen doping conditions for the test: hydrogen doping ratio = 20%, ambient pressure = 6 MPa; the tensile rate is 0.0075 mm / min. Design a control group experiment: a hydrogen-free environment is a pure nitrogen environment, ambient pressure = 6 MPa, and the tensile rate remains the same.

[0170] ④ During the testing process, the mechanical parameters of the materials were monitored, and the stress-strain curves of the weld specimen and the base metal specimen were obtained as shown in Figure 9(a) and Figure 9(b). Based on the stress-strain curves, the yield strength and tensile strength of the weld specimen in a hydrogen-doped environment were 456 MPa and 619 MPa, respectively, and in a hydrogen-free environment, they were 510 MPa and 646 MPa, respectively. Similarly, the yield strength and tensile strength of the base metal specimen in a hydrogen-doped environment were 633 MPa and 722 MPa, respectively, and in a hydrogen-free environment, they were 634 MPa and 725 MPa, respectively.

[0171] After the test, the plasticity of the samples was measured. The results showed that the section shrinkage of the weld sample was 17.47% in a hydrogen-doped environment and 24.67% in a hydrogen-free environment; and the section shrinkage of the base metal sample was 30.22% in a hydrogen-doped environment and 35.37% in a hydrogen-free environment.

[0172] Based on the above test data, the degree of reduction in the mechanical properties of the weld and the degree of reduction in the mechanical properties of the base metal were calculated as follows:

[0173]

[0174] The mixed correction factor is:

[0175]

[0176] Therefore, the pipeline hydrogen embrittlement sensitivity risk index is:

[0177] λ=[(1-η)a1+ηa2]·(τe 3.536 )

[0178] = [(1-0.5954)×0.3415+0.5954×0.1418]×(0.2×e 3.536 )

[0179] =1.44

[0180] Based on the pipeline hydrogen embrittlement sensitivity risk index value of 1.44, the following conclusion can be drawn from the table: under the conditions of 20% hydrogen doping and an ambient pressure of 6 MPa, the X80 pipeline is at a low risk level during service.

[0181] Example 3

[0182] ① An X80 pipe in a natural pipe network was selected as the test object. The specifications of the X80 pipe are: Φ1219×16mm. Both the weld specimen and the base material specimen were cut from the axial direction of the in-service pipe, with the pipe weld located at the center of the weld specimen.

[0183] ② The dimensions of the round bar specimen were designed according to standard GB / T 228.1. The total length of the specimen was 76 mm, and the diameter was maintained at 5 mm. The specimen dimensions were the same as those in Example 1, and the surface roughness of the specimen was 0.4.

[0184] ③ Determine the hydrogen doping conditions for the test: hydrogen doping ratio = 90%, ambient pressure = 9 MPa; the tensile rate for the test is 0.0015 mm / min. Design a control group experiment: a hydrogen-free environment with pure nitrogen, ambient pressure = 9 MPa, and a consistent tensile rate.

[0185] ④ During the testing process, the mechanical parameters of the materials were monitored, and the stress-strain curves of the weld specimens were obtained as shown in Figure 10(a) and the stress-strain curves of the base metal specimens were shown in Figure 10(b). Based on the stress-strain curves, the yield strength and tensile strength of the weld specimens in a hydrogen-doped environment were 416 MPa and 518 MPa, respectively, and in a hydrogen-free environment, they were 512 MPa and 648 MPa, respectively. Similarly, the yield strength and tensile strength of the base metal specimens in a hydrogen-doped environment were 543 MPa and 623 MPa, respectively, and in a hydrogen-free environment, they were 635 MPa and 726 MPa, respectively.

[0186] After the test, the plasticity of the samples was measured. The results showed that the section shrinkage of the weld sample was 9.37% in a hydrogen-doped environment and 24.54% in a hydrogen-free environment; the section shrinkage of the base metal sample was 18.92% in a hydrogen-doped environment and 35.63% in a hydrogen-free environment.

[0187] Based on the above test data, the degree of reduction in the mechanical properties of the weld and the degree of reduction in the mechanical properties of the base metal were calculated as follows:

[0188]

[0189] The mixed correction factor is:

[0190]

[0191] The pipeline hydrogen embrittlement sensitivity risk index is:

[0192] λ=[(1-η)a1+ηa2]·(τe 3.536 )

[0193] = [(1-0.0852)×0.6925+0.0852×0.5575]×(0.9×e 3.536 )

[0194] =21.01

[0195] The pipeline hydrogen embrittlement sensitivity risk index is 21.01. According to Table 1, the following conclusion can be drawn: under the conditions of 90% hydrogen content and an ambient pressure of 9 MPa, the X80 pipeline is at a high risk level during service and requires a high degree of attention.

[0196] Based on the above-described method for evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments, this specification also provides a corresponding device for evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments. The device may include a system (including a distributed system), software (application), module, component, server, client, etc., using the method described in the embodiments of this specification, combined with necessary implementation hardware. Based on the same innovative concept, the devices in one or more embodiments provided in this specification are as described in the following embodiments. Since the implementation schemes and methods for solving the problem by the device are similar, the implementation of the specific device in the embodiments of this specification can refer to the implementation of the aforementioned method, and repeated details will not be repeated. As used below, the terms "unit" or "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0197] like Figure 11 The diagram shown is a structural schematic of a pipeline hydrogen embrittlement sensitivity evaluation device provided in an embodiment of this specification. Figure 11 As shown, it includes:

[0198] The test data acquisition module 1110 is used to acquire test data of slow tensile test of weld specimen and base material specimen respectively. The test data includes section reduction rate, tensile strength and yield strength. The weld specimen and the base material specimen are obtained from the pipeline to be evaluated.

[0199] The mechanical property reduction calculation module 1120 is used to calculate the degree of mechanical property reduction of the weld based on the test data of the weld sample, and to calculate the degree of mechanical property reduction of the base material based on the test data of the base material sample.

[0200] The mixing correction factor calculation module 1130 is used to calculate the mixing correction factor based on the hydrogen doping ratio, the tensile strength, and the yield strength.

[0201] The hydrogen embrittlement sensitivity risk index calculation module 1140 is used to calculate the hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor and the hydrogen doping ratio.

[0202] Evaluation module 1150 is used to obtain the hydrogen embrittlement sensitivity evaluation level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index.

[0203] The beneficial effects obtained by the apparatus provided in the embodiments of this specification are consistent with the beneficial effects obtained by the methods described above, and will not be repeated here.

[0204] like Figure 12 The illustration shows a computer device provided in an embodiment of this specification. The pipeline hydrogen embrittlement sensitivity evaluation device in a hydrogen-doped environment described in this specification can be the computer device in this embodiment, executing the methods described above. The computer device 1202 may include one or more processors 1204, such as one or more central processing units (CPUs), each of which can implement one or more hardware threads. The computer device 1202 may also include any memory 1206 for storing information of any kind, such as code, settings, data, etc. Non-limitingly, for example, the memory 1206 may include any type of RAM, any type of ROM, flash memory, hard disk, optical disk, etc. More generally, any memory can use any technology to store information. Further, any memory can provide volatile or non-volatile retention of information. Further, any memory can represent a fixed or removable component of the computer device 1202. In one case, when the processor 1204 executes associated instructions stored in any memory or combination of memories, the computer device 1202 can perform any operation of the associated instructions. The computer device 1202 also includes one or more drive mechanisms 1208 for interacting with any memory, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0205] Computer device 1202 may also include an input / output module 1210 (I / O) for receiving various inputs (via input device 1212) and providing various outputs (via output device 1214). A specific output mechanism may include a presentation device 1216 and an associated graphical user interface (GUI) 1218. In other embodiments, the input / output module 1210 (I / O), input device 1212, and output device 1214 may be omitted, and the device may function solely as a computer device within a network. Computer device 1202 may also include one or more network interfaces 1220 for exchanging data with other devices via one or more communication links 1222. One or more communication buses 1224 couple the components described above together.

[0206] Communication link 1222 can be implemented in any way, such as via a local area network, a wide area network (e.g., the Internet), a point-to-point connection, or any combination thereof. Communication link 1222 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.

[0207] Corresponding to, for example Figure 1 , Figure 4 and Figure 6 In addition to the method shown, embodiments of this specification also provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the above-described method.

[0208] This specification also provides computer-readable instructions, wherein when a processor executes the instructions, the program therein causes the processor to perform the following... Figure 1 , Figure 4 and Figure 6 The method.

[0209] This specification also provides a computer program product, including at least one instruction or at least one program segment, wherein the at least one instruction or the at least one program segment is loaded and executed by a processor to achieve the following: Figure 1 , Figure 4 and Figure 6 The method.

[0210] It should be understood that in the various embodiments of this specification, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0211] It should also be understood that, in the embodiments of this specification, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this specification generally indicates that the preceding and following related objects have an "or" relationship.

[0212] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this specification can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this specification.

[0213] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0214] In the several embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices, or units, or they may be electrical, mechanical, or other forms of connection.

[0215] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments described in this specification, depending on actual needs.

[0216] Furthermore, the functional units in the various embodiments of this specification can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0217] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this specification, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this specification. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0218] This specification uses specific embodiments to illustrate the principles and implementation methods of this specification. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this specification. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this specification. Therefore, the content of this specification should not be construed as a limitation of this specification.

Claims

1. A method for evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments, characterized in that, include: Test data for slow tensile testing of weld specimens and base metal specimens were obtained separately. The test data included the reduction of area, tensile strength and yield strength. The weld specimens and the base metal specimens were obtained from the pipeline to be evaluated. Based on the test data of the weld sample, the degree of reduction in the mechanical properties of the weld is calculated, and based on the test data of the base material sample, the degree of reduction in the mechanical properties of the base material is calculated. The mixing correction factor is calculated based on the hydrogen doping ratio, the tensile strength, and the yield strength. The hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated is calculated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor, and the hydrogen doping ratio. Based on the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated is obtained; Among them, the test data of slow tensile tests of weld specimens and base metal specimens were obtained separately, and further: The weld specimens were subjected to slow tensile tests in hydrogen-doped and hydrogen-free environments, respectively, to obtain the first stress-strain curve in the hydrogen-doped environment and the second stress-strain curve in the hydrogen-free environment. Based on the first stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-doped environment are obtained, and based on the second stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-free environment are obtained. The cross-sectional shrinkage rate under hydrogen-doped environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-doped environment; and the cross-sectional shrinkage rate under hydrogen-free environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-free environment. The parent material sample was subjected to slow tensile tests in a hydrogen-doped environment and a hydrogen-free environment, respectively, to obtain the third stress-strain curve in the hydrogen-doped environment and the fourth stress-strain curve in the hydrogen-free environment. Based on the third stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-doped environment are obtained, and based on the fourth stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-free environment are obtained. The cross-sectional shrinkage rate under hydrogen-doped conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-doped conditions; and the cross-sectional shrinkage rate under hydrogen-free conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-free conditions. The hybrid correction factor is calculated according to the following formula: ； in, It is a mixed correction factor; The hydrogen doping ratio is %; The yield strength of the weld specimen in a hydrogen-free environment, in MPa; , where is the yield strength of the parent material sample in a hydrogen-free environment, in MPa; The tensile strength of the weld specimen in a hydrogen-free environment, in MPa; , where represents the tensile strength of the parent material sample in a hydrogen-free environment, in MPa.

2. The method according to claim 1, characterized in that, The degree of reduction in the mechanical properties of the weld is calculated using the following formula: ； in, a 1 represents the degree of reduction in the mechanical properties of the weld, % The section reduction rate of the weld specimen under hydrogen-doped environment, % The section reduction rate of the weld specimen in a hydrogen-free environment, % , where is the yield strength of the weld specimen in a hydrogen-doped environment, in MPa; The yield strength of the weld specimen in a hydrogen-free environment, in MPa; The tensile strength of the weld specimen in a hydrogen-doped environment is expressed in MPa. The tensile strength of the weld specimen in a hydrogen-free environment, in MPa; The degree of reduction in the mechanical properties of the base material is calculated using the following formula: ； in, a 2 represents the degree of reduction in the mechanical properties of the base material, % The section reduction rate of the parent material sample under hydrogen-doped environment is %; The section reduction rate of the parent material sample under hydrogen-free conditions, % , where is the yield strength of the parent material sample under hydrogen-doped conditions, in MPa; , where is the yield strength of the parent material sample in a hydrogen-free environment, in MPa; , where is the tensile strength of the parent material sample under hydrogen-doped conditions, in MPa; , where represents the tensile strength of the parent material sample in a hydrogen-free environment, in MPa.

3. The method according to claim 1, characterized in that, The hydrogen embrittlement sensitivity risk index is calculated according to the following formula: ； in, λ This is a pipeline hydrogen embrittlement sensitivity risk index; a 1 represents the degree of reduction in the mechanical properties of the weld, % a 2 represents the degree of reduction in the mechanical properties of the base material, % It is a mixed correction factor; The hydrogen doping ratio is %.

4. The method according to claim 1, characterized in that, Based on the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated is obtained, including: Determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset first threshold; If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the first risk level; If not, determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset second threshold; If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the second risk level; If not, determine whether the hydrogen embrittlement sensitivity risk index is less than or equal to a preset third threshold; If so, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at the third risk level; If not, the hydrogen embrittlement sensitivity of the pipeline to be evaluated is determined to be at risk level four. The risk increases progressively from the first risk level to the second risk level, the third risk level, and the fourth risk level.

5. The method according to claim 1, characterized in that, The step of obtaining the hydrogen embrittlement sensitivity assessment level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index is further described as follows: Obtain the roughness of the pipe to be evaluated; Based on the roughness and the hydrogen embrittlement sensitivity risk index, the hydrogen embrittlement sensitivity evaluation result of the pipeline to be evaluated is obtained.

6. A device for evaluating the hydrogen embrittlement sensitivity of pipelines under hydrogen-doped environments, characterized in that, include: The test data acquisition module is used to obtain test data of slow tensile test of weld specimen and base material specimen respectively. The test data includes the reduction of section, tensile strength and yield strength. The weld specimen and the base material specimen are obtained from the pipeline to be evaluated. The mechanical property reduction calculation module is used to calculate the degree of mechanical property reduction of the weld based on the test data of the weld sample, and to calculate the degree of mechanical property reduction of the base material based on the test data of the base material sample. The hybrid correction factor calculation module is used to calculate the hybrid correction factor based on the hydrogen doping ratio, the tensile strength, and the yield strength. The hydrogen embrittlement sensitivity risk index calculation module is used to calculate the hydrogen embrittlement sensitivity risk index of the pipeline to be evaluated based on the degree of reduction in the mechanical properties of the weld, the degree of reduction in the mechanical properties of the base material, the mixing correction factor, and the hydrogen doping ratio. The evaluation module is used to obtain the hydrogen embrittlement sensitivity evaluation level of the pipeline to be evaluated based on the hydrogen embrittlement sensitivity risk index. Among them, the test data of slow tensile tests of weld specimens and base metal specimens were obtained separately, and further: The weld specimens were subjected to slow tensile tests in hydrogen-doped and hydrogen-free environments, respectively, to obtain the first stress-strain curve in the hydrogen-doped environment and the second stress-strain curve in the hydrogen-free environment. Based on the first stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-doped environment are obtained, and based on the second stress-strain curve, the yield strength and tensile strength of the weld specimen in a hydrogen-free environment are obtained. The cross-sectional shrinkage rate under hydrogen-doped environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-doped environment; and the cross-sectional shrinkage rate under hydrogen-free environment is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the weld specimen under hydrogen-free environment. The parent material sample was subjected to slow tensile tests in a hydrogen-doped environment and a hydrogen-free environment, respectively, to obtain the third stress-strain curve in the hydrogen-doped environment and the fourth stress-strain curve in the hydrogen-free environment. Based on the third stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-doped environment are obtained, and based on the fourth stress-strain curve, the yield strength and tensile strength of the parent material sample in a hydrogen-free environment are obtained. The cross-sectional shrinkage rate under hydrogen-doped conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-doped conditions; and the cross-sectional shrinkage rate under hydrogen-free conditions is obtained based on the initial cross-sectional area and the cross-sectional area after testing of the gauge length section of the parent material sample under hydrogen-free conditions. The hybrid correction factor is calculated according to the following formula: ； in, It is a mixed correction factor; The hydrogen doping ratio is %; The yield strength of the weld specimen in a hydrogen-free environment, in MPa; , where is the yield strength of the parent material sample in a hydrogen-free environment, in MPa; The tensile strength of the weld specimen in a hydrogen-free environment, in MPa; , where represents the tensile strength of the parent material sample in a hydrogen-free environment, in MPa.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 5.

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