Modularized assembling method of reformer pipeline

Abstract

The invention discloses a modular assembly method of a reformer pipeline, relates to the technical field of reformer pipeline assembly, aims to solve the problem of poor quality of the welded reformer pipeline, and provides a modular assembly method of the reformer pipeline, which confirms a spot welding mode according to the material quality, strictly controls the welding material selection, the welding process and the subsequent treatment of spot welding and formal welding, and improves the welding quality of the reformer pipeline. Welding defects can be effectively avoided, the quality of a welding joint is improved, the welding preheating temperature, the interlayer temperature, the welding seam appearance and the like are strictly monitored and checked, the welding quality is further ensured, the welding process is planned and guided in detail, constructors can quickly and accurately complete the welding task, and the construction efficiency is improved. The radiation section pipeline and the cylindrical pipeline are divided into independent pipe groups, and the convection section pipeline is modularly prefabricated, so that most welding, heat treatment and nondestructive inspection work can be carried out on the ground. In this way, the high-altitude operation time is shortened, and the safety risk of high-altitude operation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of reformer pipe assembly, in particular to a modular assembly method of reformer pipes. Background Art

[0002] Reformer pipe assembly refers to the process of connecting and installing the various pipe components required for the reformer according to the design requirements.

[0003] The patent application with publication number CN107990718A discloses a modular manufacturing method for a large-scale converter, which mainly conducts in-depth analysis of the converter before construction, and performs modular disassembly, process arrangement, prefabrication construction, overall packaging, and overall roll-on / roll-off of the converter in advance according to the regulations of the final output location of the converter, thereby achieving the purpose of shortening the converter manufacturing cycle, reducing manufacturing intensity, and reducing environmental pollution. Although the above patent solves the problem of pipeline modularization, the following problems still exist in actual operation: 1. After the converter pipe materials were obtained, they were not further inspected and tested, resulting in material abnormalities and inability to perform normal construction.

[0004] 2. During the pipeline welding process, no targeted welding plan was confirmed based on the pipeline material, resulting in poor pipeline welding quality.

[0005] 3. Failure to formulate a more detailed assembly plan for the pipeline, and failure to conduct further quality inspection on the assembled pipeline, resulted in the pipeline being unable to be used normally. Summary of the invention

[0006] The purpose of the present invention is to provide a modular assembly method for a converter pipeline, confirm the spot welding method according to the material of the material, and strictly control the selection of welding materials, welding process and subsequent treatment of spot welding and formal welding, which can effectively avoid the generation of welding defects, improve the quality of welded joints, strictly monitor and inspect the welding preheating temperature, interlayer temperature, weld appearance, etc., further ensure the welding quality, and plan and guide the welding process in detail, which helps construction personnel to complete the welding task quickly and accurately. By dividing the radiation section pipeline and the cylindrical pipeline into independent pipe groups, and modularly prefabricating the convection section pipeline, most of the welding, heat treatment and non-destructive testing work can be carried out on the ground. Doing so reduces the time of high-altitude operations and reduces the safety risks of high-altitude operations, and can solve the problems in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solutions: The modular assembly method of the reformer pipe comprises the following steps: S1: Preparation of reformer pipeline drawings and process documents: obtaining the proposed pipeline drawings and process documents from the database, and printing and dividing the proposed pipeline drawings and process documents; S2: Process document and material acceptance: According to the printed and divided pipeline drawings and process documents, the provided materials will be inspected, and after the inspection, the material acceptance report and quality assurance certificate will be obtained; S3: Construction personnel training: training and examination of construction personnel according to pipeline drawings and process documents, and confirmation of construction date based on the results of training and examination; S4: Spot welding of the converter pipeline: The construction personnel weld the converter pipeline according to the pipeline drawings and process documents. At the same time, the welding process of the converter pipeline is supervised and inspected; S5: Assembling the reformer pipeline: After the reformer pipeline is welded, the pipelines are assembled in sequence; S6: Inspection and testing of converter pipelines: After the converter pipelines are assembled, they are subjected to visual inspection and non-destructive testing in turn. After both visual inspection and non-destructive testing are qualified, a water pressure test is carried out. Finally, the assembly quality of the converter pipelines is determined based on the water pressure test results.

[0008] Preferably, the method of acquiring the proposed pipeline drawings and process documents from the database in S1, and printing and dividing the proposed pipeline drawings and process documents includes: The pipeline drawing of the reformer divides the reformer pipeline into a radiation section module and a convection section module; The radiation section module is located in the high-temperature radiation zone of the reformer furnace. The radiation zone is an area that uses the radiation heat of flames and high-temperature flue gas to heat the pipeline and the materials in the pipeline. The radiation zone includes the steel structure shell, internal pipelines and support frames. The convection section module is located in the convection zone of the reformer furnace. The convection zone is an area that uses the convection effect of flue gas to transfer heat to the pipeline and the materials in the pipeline. The convection zone includes multiple preheaters and heat exchangers. The process documents include welding position diagram of converter pipe assembly, welding process specification, heat treatment process card, PMI inspection sheet, ferrite inspection sheet and ITP; The process documents and pipeline drawings are printed out using a printer and stored after printing.

[0009] Preferably, the materials to be provided in S2 are inspected, and after the inspection is completed, an acceptance report and a quality assurance certificate for the materials are obtained, including: Acceptance of materials, including steel plates, steel pipes, pipe fittings, and welding materials. The material acceptance process is to inspect and check the material quality, specifications, and surface quality of the materials according to the pipeline drawings and process documents; Check the size of the pipe fittings, including the center distance of the 180-degree elbow, the fin length and the end tube length. The fin length and the end tube length should not be less than 100mm. The materials that have been inspected and checked are inspected, among which stainless steel 347 and heat-resistant steel Gr5 are respectively inspected for PMI, and 10% of the samples of stainless steel 347 and heat-resistant steel Gr5 are sampled for PMI inspection; Among them, PMI is used to test the Cr, Ni, and Nb elements in stainless steel 347; PMI is used to test the Cr and Mo elements in heat-resistant steel Gr5; After all materials are inspected, an acceptance report is prepared. At the same time, the welding materials in the materials are given a quality assurance certificate and color ribbon code; After the material preparation is completed, the pipeline drawings and process documents will be marked as documents to be issued.

[0010] Preferably, the construction personnel are trained according to the pipeline drawings and process documents in S3, and the construction date is confirmed according to the training results, including: Obtain pipeline drawings and process documents to be issued, and issue them to the construction team; Provide training and examination to construction personnel according to the welding position diagram and welding process specifications in the pipeline drawings and process documents; Arrange construction personnel according to training and examination results; The construction date will be confirmed after the construction personnel are arranged.

[0011] Preferably, the construction personnel in S4 weld the reformer pipeline according to the pipeline drawings and process documents. Meanwhile, when the reformer pipeline is being welded, the welding process is supervised and inspected, including: Confirm the spot welding method according to the material quality; Among them, the spot welding methods are divided into wedge block spot welding and in-break spot welding; When using wedge blocks for spot welding, the material of the wedge blocks and the welding materials for spot welding should be the same as those for the main material. After welding, the wedge blocks should be removed and the spot welding points should be ground off. When spot welding in groove is used, the welding materials for spot welding should be the same as those for regular welding. The spot welding points should be removed by grinding during the base welding. At the same time, when spot welding in groove is used, ensure that the spot welding seam has no defects, including cracks and pores. Among them, when the spot welds cannot be ground due to space constraints, the spot welds of the wedge blocks and the spot welds in the gaps are regarded as part of the formal welds and are retained.

[0012] Preferably, the construction personnel in S4 weld the reformer pipeline according to the pipeline drawings and process documents, and supervise and inspect the welding process when the reformer pipeline is welded, which also includes: When welding materials, welding shall be carried out according to the welding procedure specification. At the same time, the welding preheating temperature shall be monitored according to the welding procedure specification and ASME; During the welding process, the interlayer temperature of stainless steel 347 and heat-resistant steel Gr5 is controlled, wherein the interlayer temperature of stainless steel 347 is less than 150 degrees, and the interlayer temperature of heat-resistant steel Gr5 is less than 300 degrees; After the base welding is completed, the branch pipe platform is self-checked. The root of the branch pipe platform is in a weld-through state. If the branch pipe platform is not formed at all, the root of the branch pipe platform is filled and covered; After welding is completed, the joint surface is inspected. If there are surface cracks, incomplete penetration, lack of fusion, surface pores, arc pits, unfilled, undercuts, slag inclusions and spatter on the joint surface, the joint is marked as an abnormal joint and reprocessed; There should be a smooth transition between the weld and the parent material, and the shape of the fillet weld should be concave and smooth; After welding is completed, a steel stamp is printed around the joint; After the branch pipe platform is welded, it is assembled. The assembly methods include socket type and sitting type, and the welding gap is adjusted. At the same time, the branch pipe platform is filled and covered after the base welding; After welding is completed, stainless steel 347 and heat-resistant steel Gr5 are immediately heat treated, wherein stainless steel 347 is subjected to stabilization heat treatment and heat-resistant steel Gr5 is subjected to stress relief heat treatment; If heat treatment cannot be performed immediately, use insulation cotton to wrap the weld for slow cooling; If the material is repaired after welding, it shall be heat treated again after repair, and the relevant process of reheat treatment shall be recorded; When performing manual welding, the welding rod should be kept at a temperature of 100 to 150 degrees before welding; During welding, the thickness of each weld layer should be controlled within 4-5mm, and the swing amplitude should not exceed 3 times the diameter of the welding rod.

[0013] Preferably, after the welding of the reformer pipeline in S5 is completed, the pipeline assembly is performed in sequence, including: Divide the radial section pipeline into eight independent pipe groups, each of which is set to be 3 meters wide and 13 meters long; Divide the cylindrical pipeline into eight independent pipe groups, each of which is set to be 2.5 meters wide and 13 meters long; The convection section pipeline is modularly prefabricated on the ground to form a "U"-shaped tube bundle module. One side of each module is set at 90 degrees and 270 degrees as a fixed port. The module is divided into two layers and manufactured separately. After each layer of modules is welded, heat treated and non-destructive testing is completed, the splicing and connection welding work is carried out. The welding work of the convection section is carried out in batches in conjunction with arc-shaped special tooling.

[0014] Preferably, after the reformer pipeline in S6 is assembled, visual inspection and nondestructive inspection are sequentially performed, and after both the visual inspection and the nondestructive inspection are qualified, a hydraulic test is performed, and finally the assembly quality of the reformer pipeline is determined according to the result of the hydraulic test, including: After the reformer pipeline is assembled, a visual inspection is carried out first. The visual inspection is to clean the pipeline surface and check whether the weld has cracks, lack of fusion, lack of penetration, slag inclusions, and pores. If visual inspection shows abnormalities, the reformer pipes will be processed; After the visual inspection is completed and no abnormalities are found, non-destructive testing is carried out. Non-destructive testing includes radiographic testing, ultrasonic testing, penetrant testing and magnetic testing; If the nondestructive testing shows abnormalities, the reformer pipes will be processed; After the nondestructive testing is completed and no abnormalities are found, a water pressure test is performed; The water pressure test is to fill the reformer pipe with industrial water and install an exhaust valve and a pressure gauge at the highest point of the reformer pipe; Use a water pump to slowly pressurize the container while observing the reading on the pressure gauge; If leakage or abnormality is found, pressurization should be stopped immediately; After reaching the maximum test pressure, close the water pump inlet valve and record the pressure drop; The tightness of the reformer pipe is determined based on the pressure reduction speed and pressure reduction amount; The quality of the reformer pipe assembly is determined by the tightness.

[0015] Preferably, before using a water pump to slowly pressurize the container, a pressurization gradient is set, and after the pressurization gradient is set, the water pump is used to slowly pressurize the container according to the pressurization gradient, including: Extracting the current air content volume of the reformer duct; Extracting the current pipe temperature of the reforming furnace pipe and the maximum value of the theoretical change of the pipe temperature during the pressurization process under ideal environmental conditions; The pressurization gradient parameter is obtained by using the current air content volume of the reformer pipeline, the current pipeline temperature of the reformer pipeline, and the maximum amplitude value of the pipeline temperature change during the pressurization process under ideal environmental conditions in theory; The pressure gradient parameter is obtained by the following formula: Where F represents the pressure gradient parameter; V a Indicates the current air content volume of the reformer duct; V m Indicates the filling volume of industrial water in the current reformer pipeline; T d Indicates the current temperature of the reformer pipeline; ΔT indicates the maximum value of the change in pipeline temperature during the pressurization process in theory under ideal environmental conditions; The pressurization gradient parameter is used in combination with the material, wall thickness and volume of the reformer pipe to set the pressurization gradient value.

[0016] Preferably, the pressurization gradient value is set by combining the pressurization gradient parameter with the material, wall thickness and volume of the reformer pipe, including: Retrieving material data of the reformer pipeline; Obtaining the yield strength corresponding to the material of the reformer pipe through the material data of the reformer pipe; Extracting the pipe wall thickness and pipe volume of the reformer pipe; Extracting a pressurization gradient parameter, and using the pressurization gradient parameter in combination with the yield strength, pipe wall thickness, and pipe volume corresponding to the material of the reformer pipe to obtain a pressurization gradient value; The pressure gradient value is obtained by the following formula: Where G represents the pressure gradient value; σ y represents the yield strength of the material of the reformer pipe; t represents the pipe wall thickness; V represents the pipe volume; P max represents the maximum test pressure; C represents the safety factor; and the safety factor is obtained by the following formula: Where C is the safety factor; σ y Indicates the yield strength of the material of the reformer pipe; σ d Indicates the maximum stress that the pipeline material is expected to withstand under actual operating conditions; F 01 Indicates the correction factor of material properties, with a value range of 0.7-1.0; w 01 Indicates the weight value corresponding to the correction factor of material properties; F 02 Indicates the correction factor of operating conditions, with a value range of 0.5-1.0; w 02 Indicates the weight value corresponding to the correction factor of the operating conditions; F 03 Indicates the correction factor of historical data, and its value range is 0.8-1.0; w 03Indicates the weight value corresponding to the correction factor of historical data; F 04 represents the correction factor of risk management, and its value range is 0.5-1.0; w 04 Indicates the weight value corresponding to the risk management correction factor.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The modular assembly method of the converter pipeline provided by the present invention can effectively avoid the occurrence of welding defects and improve the quality of welded joints by confirming the spot welding method according to the material quality of the material and strictly controlling the selection of welding materials, welding process and subsequent treatment of spot welding and formal welding. The welding preheating temperature, interlayer temperature, weld appearance, etc. are strictly monitored and inspected to further ensure the welding quality, and the welding process is planned and guided in detail, which helps construction personnel to complete welding tasks quickly and accurately.

[0018] 2. The modular assembly method of the reformer pipe provided by the present invention can realize most of the welding, heat treatment and non-destructive testing work on the ground by dividing the radiation section pipe and the cylindrical pipe into independent pipe groups and modularly prefabricating the convection section pipe. This reduces the time of high-altitude operations, improves construction efficiency, and reduces the safety risks of high-altitude operations. After each module is independently manufactured, it undergoes strict inspection to ensure that the quality meets the standards before splicing and welding of the connection ports, which helps to reduce quality problems in the overall assembly process.

[0019] 3. The modular assembly method of the converter pipeline provided by the present invention has a detection process divided into three stages: visual inspection, non-destructive inspection and water pressure test. Each stage has clear inspection content and standards. Through comprehensive inspection and evaluation, potential safety hazards can be discovered and eliminated in time, such as welding defects such as cracks, lack of fusion, incomplete penetration, and sealing problems such as leakage, thereby improving the safety performance of the converter pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of modular assembly steps of the reformer pipeline of the present invention; Figure 2 It is a schematic diagram of the modular assembly process of the reformer pipeline of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to solve the problem in the prior art that after the reformer pipe materials are obtained, the materials are not further inspected and tested, resulting in abnormal materials and failure of normal construction, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions: The modular assembly method of the reformer pipe comprises the following steps: S1: Preparation of reformer pipeline drawings and process documents: obtaining the proposed pipeline drawings and process documents from the database, and printing and dividing the proposed pipeline drawings and process documents; Among them, by dividing the reformer pipeline into radiation section modules and convection section modules, the modularization of pipeline assembly is realized, and the prefabrication and assembly of different modules can be carried out in parallel, which can ensure that the materials used for the assembly of the reformer pipeline meet the design requirements and quality standards; S2: Process document and material acceptance: According to the printed and divided pipeline drawings and process documents, the provided materials will be inspected, and after the inspection, the material acceptance report and quality assurance certificate will be obtained; Among them, through strict acceptance of key materials such as steel plates, steel pipes, pipe fittings, welding materials, etc.; S3: Construction personnel training: training and examination of construction personnel according to pipeline drawings and process documents, and confirmation of construction date based on the results of training and examination; Among them, by providing detailed training and examinations to construction personnel based on pipeline drawings and process documents, it can ensure that construction personnel fully understand and master key information such as welding positions and welding process regulations; S4: Spot welding of the converter pipeline: The construction personnel weld the converter pipeline according to the pipeline drawings and process documents. At the same time, the welding process of the converter pipeline is supervised and inspected; Among them, through strict welding process control and detection measures, welding quality is ensured, welding efficiency is improved, construction safety is guaranteed, modular assembly is promoted, traceability is enhanced, and welding process is optimized; S5: Assembling the reformer pipeline: After the reformer pipeline is welded, the pipelines are assembled in sequence; Among them, the integrity and stability of the entire pipeline system can be ensured through precise splicing and welding of the connection ports during the assembly process; S6: Inspection and testing of the reformer pipeline: After the reformer pipeline is assembled, visual inspection and non-destructive testing are carried out in turn. After both the visual inspection and non-destructive testing are passed, a hydraulic test is carried out. Finally, the assembly quality of the reformer pipeline is determined based on the results of the hydraulic test; Among them, through comprehensive testing and evaluation, potential safety hazards were discovered and eliminated in a timely manner, improving the safety performance of the converter pipeline.

[0023] In S1, the proposed pipeline drawings and process documents are obtained from the database, and the proposed pipeline drawings and process documents are printed and divided, including: The pipeline drawing of the reformer divides the reformer pipeline into a radiation section module and a convection section module; The radiation section module is located in the high-temperature radiation zone of the reformer furnace. The radiation zone is an area that uses the radiation heat of flames and high-temperature flue gas to heat the pipeline and the materials in the pipeline. The radiation zone includes the steel structure shell, internal pipelines and support frames. The convection section module is located in the convection zone of the reformer furnace. The convection zone is an area that uses the convection effect of flue gas to transfer heat to the pipeline and the materials in the pipeline. The convection zone includes multiple preheaters and heat exchangers. The process documents include welding position diagram of converter pipe assembly, welding process specification, heat treatment process card, PMI inspection sheet, ferrite inspection sheet and ITP; The process documents and pipeline drawings are printed out using a printer and stored after printing.

[0024] Specifically, by dividing the reformer pipeline into radiation section modules and convection section modules, modularization of pipeline assembly is achieved. This modular design makes the construction process more orderly, and the prefabrication and assembly of different modules can be carried out in parallel, thereby greatly shortening the overall construction period. Prefabrication and testing of modules in the factory can better control key factors such as welding quality, heat treatment effect and material properties, thereby improving the overall construction quality. The modular design makes the reformer pipeline system clearer and more orderly, which is convenient for subsequent management and maintenance. When a module has a problem, it can be more easily located, replaced or repaired, reducing downtime and maintenance costs.

[0025] The materials to be provided in S2 will be inspected, and after the inspection is completed, the acceptance report and warranty of the materials will be obtained, including: Acceptance of materials, including steel plates, steel pipes, pipe fittings, and welding materials. The material acceptance process is to inspect and check the material quality, specifications, and surface quality of the materials according to the pipeline drawings and process documents; Check the size of the pipe fittings, including the center distance of the 180-degree elbow, the fin length and the end tube length. The fin length and the end tube length should not be less than 100mm. The materials that have been inspected and checked are inspected, among which stainless steel 347 and heat-resistant steel Gr5 are respectively inspected for PMI, and 10% of the samples of stainless steel 347 and heat-resistant steel Gr5 are sampled for PMI inspection; Among them, PMI is used to test the Cr, Ni, and Nb elements in stainless steel 347; PMI is used to test the Cr and Mo elements in heat-resistant steel Gr5; After all materials are inspected, an acceptance report is prepared. At the same time, the welding materials in the materials are given a quality assurance certificate and color ribbon code; After the material preparation is completed, the pipeline drawings and process documents will be marked as documents to be issued.

[0026] Specifically, through strict acceptance of key materials such as steel plates, steel pipes, pipe fittings, and welding materials, including inspection and verification of material, specifications, and surface quality, as well as detailed verification of pipe fitting dimensions, it can be ensured that the materials used for the assembly of the converter pipeline meet the design requirements and quality standards. PMI inspection of special materials such as stainless steel 347 and heat-resistant steel Gr5 can accurately determine the chemical composition of the materials and ensure that the materials meet specific requirements such as corrosion resistance and high temperature resistance. This is particularly important for converter pipelines working in high temperature and high pressure environments, which can effectively prevent safety accidents caused by material quality problems. The formulation of unified material inspection processes and standards, such as the detection requirements for specific elements in PMI inspections and the verification standards for pipe fitting dimensions, will help to achieve standardization and normalization of the construction process. The preparation of acceptance reports for the inspected materials, as well as the preparation of quality assurance books and color ribbon codes for welding materials, can establish a complete material archive and traceability system. This helps to quickly locate material information during the subsequent construction process, facilitating management and maintenance.

[0027] In order to solve the problem that in the existing technology, the pipeline welding process does not carry out targeted welding scheme confirmation according to the pipeline material, resulting in poor pipeline welding quality, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions: In S3, construction personnel are trained according to pipeline drawings and process documents, and the construction date is confirmed based on the training results, including: Obtain pipeline drawings and process documents to be issued, and issue them to the construction team; Provide training and examination to construction personnel according to the welding position diagram and welding process specifications in the pipeline drawings and process documents; Arrange construction personnel according to training and examination results; The construction date will be confirmed after the construction personnel are arranged.

[0028] Specifically, by providing detailed training and examinations to construction personnel based on pipeline drawings and process documents, it can be ensured that construction personnel fully understand and master key information such as welding positions and welding process specifications. This targeted training can significantly improve the skill level and construction quality of construction personnel, and reduce welding defects and quality problems caused by improper operation. The training and examination process not only focuses on construction skills, but also emphasizes safety precautions and operating procedures during the construction process. This helps to enhance the safety awareness of construction personnel and reduce the occurrence of safety accidents. At the same time, the reasonable arrangement of construction personnel can also ensure collaborative work and mutual supervision during the construction process, further improve construction safety, and construction personnel who have passed the training and examination can complete construction tasks more quickly and accurately.

[0029] In S4, the construction personnel welded the converter pipeline according to the pipeline drawings and process documents. At the same time, the welding process was supervised and inspected, including: Confirm the spot welding method according to the material quality; Among them, the spot welding methods are divided into wedge block spot welding and in-break spot welding; When using wedge blocks for spot welding, the material of the wedge blocks and the welding materials for spot welding should be the same as those for the main material. After welding, the wedge blocks should be removed and the spot welding points should be ground off. When spot welding in groove is used, the welding materials for spot welding should be the same as those for regular welding. The spot welding points should be removed by grinding during the base welding. At the same time, when spot welding in groove is used, ensure that the spot welding seam has no defects, including cracks and pores. Among them, when the spot welds cannot be ground due to space constraints, the spot welds of the wedge blocks and the spot welds in the gaps are regarded as part of the formal welds and are retained.

[0030] When welding materials, welding shall be carried out according to the welding procedure specification. At the same time, the welding preheating temperature shall be monitored according to the welding procedure specification and ASME; During the welding process, the interlayer temperature of stainless steel 347 and heat-resistant steel Gr5 is controlled, wherein the interlayer temperature of stainless steel 347 is less than 150 degrees, and the interlayer temperature of heat-resistant steel Gr5 is less than 300 degrees; After the base welding is completed, the branch pipe platform is self-checked. The root of the branch pipe platform is in a weld-through state. If the branch pipe platform is not formed at all, the root of the branch pipe platform is filled and covered; After welding is completed, the joint surface is inspected. If there are surface cracks, incomplete penetration, lack of fusion, surface pores, arc pits, unfilled, undercuts, slag inclusions and spatter on the joint surface, the joint is marked as an abnormal joint and reprocessed; There should be a smooth transition between the weld and the parent material, and the shape of the fillet weld should be concave and smooth; After welding is completed, a steel stamp is printed around the joint; After the branch pipe platform is welded, it is assembled. The assembly methods include socket type and sitting type, and the welding gap is adjusted. At the same time, the branch pipe platform is filled and covered after the base welding; After welding is completed, stainless steel 347 and heat-resistant steel Gr5 are immediately heat treated, wherein stainless steel 347 is subjected to stabilization heat treatment and heat-resistant steel Gr5 is subjected to stress relief heat treatment; If heat treatment cannot be performed immediately, use insulation cotton to wrap the weld for slow cooling; If the material is repaired after welding, it shall be heat treated again after repair, and the relevant process of reheat treatment shall be recorded; When performing manual welding, the welding rod should be kept at a temperature of 100 to 150 degrees before welding; During welding, the thickness of each weld layer should be controlled within 4-5mm, and the swing amplitude should not exceed 3 times the diameter of the welding rod.

[0031] Specifically, by confirming the spot welding method according to the material quality, and strictly controlling the selection of welding materials, welding process and subsequent treatment for spot welding and formal welding, such as removing wedge blocks and grinding spot welding points, welding defects can be effectively avoided and the quality of welded joints can be improved. At the same time, strict monitoring and inspection of welding preheating temperature, interlayer temperature, weld appearance, etc. further ensure the welding quality, and detailed planning and guidance of the welding process, such as controlling weld thickness and swing, help construction personnel complete welding tasks quickly and accurately. In addition, strict control of welding quality also reduces rework and repair work caused by quality problems, thereby improving overall welding efficiency. Through comprehensive monitoring and inspection of the welding process, potential safety hazards, such as cracks, pores and other welding defects, are discovered and handled in a timely manner, ensuring safety during the construction process. At the same time, special treatments are carried out on the welding process of special materials such as stainless steel 347 and heat-resistant steel Gr5, such as stabilization heat treatment and stress relief heat treatment, which further improves the safety performance of the materials. The welding and assembly process fully considers the modular characteristics of the converter pipeline, such as the welding and assembly of the branch pipe platform, the misalignment adjustment of the welding gap, etc., which helps to achieve the rapid assembly and connection of the pipeline module. This can not only shorten the construction period, but also improve the integrity and stability of the pipeline system. After the welding is completed, measures such as steel stamping around the joints are taken to help record the welding process and results and enhance traceability. The compliance with the welding process regulations and ASME standards, as well as the consideration of the welding characteristics of different materials, help optimize the welding process and improve the mechanical properties and corrosion resistance of the welded joints.

[0032] In order to solve the problem in the prior art that there is no more detailed assembly plan for the pipeline, and no further quality inspection of the assembled pipeline, which leads to the pipeline being unable to be used normally, the present embodiment provides the following technical solutions: After the S5 reformer pipeline welding is completed, the pipeline assembly is carried out in sequence, including: Divide the radial section pipeline into eight independent pipe groups, each of which is set to be 3 meters wide and 13 meters long; Divide the cylindrical pipeline into eight independent pipe groups, each of which is set to be 2.5 meters wide and 13 meters long; The convection section pipeline is modularly prefabricated on the ground to form a "U"-shaped tube bundle module. One side of each module is set at 90 degrees and 270 degrees as a fixed port. The module is divided into two layers and manufactured separately. After each layer of modules is welded, heat treated and non-destructive testing is completed, the splicing and connection welding work is carried out. The welding work of the convection section is carried out in batches in conjunction with arc-shaped special tooling.

[0033] Specifically, by dividing the radiation section pipeline and the cylindrical pipeline into independent pipe groups, and modular prefabrication of the convection section pipeline, most of the welding, heat treatment and non-destructive testing work can be carried out on the ground. This reduces the time of high-altitude operations, improves construction efficiency, and reduces the safety risks of high-altitude operations. Modular prefabrication allows welding, heat treatment and testing work to be carried out in a more stable and controlled environment, thereby improving the construction quality. After each module is independently manufactured, it undergoes strict inspection to ensure that the quality meets the standards before splicing and welding of the connection ports, which helps to reduce quality problems in the overall assembly process. Dividing the converter pipeline into smaller modules makes transportation more convenient. At the same time, during on-site assembly, the position and angle of the module can be adjusted more flexibly, reducing the difficulty and complexity of installation. In addition, modular design also helps to reduce the workload of on-site construction and shorten the construction period. By dividing the pipeline into modules and prefabricating it on the ground, it can be ensured that each module meets high precision and quality requirements before assembly. During the assembly process, through precise splicing and welding of the connection ports, the integrity and stability of the entire pipeline system can be ensured, and the operating reliability and safety of the equipment can be improved.

[0034] After the S6 converter pipeline is assembled, visual inspection and non-destructive inspection are carried out in turn. After both visual inspection and non-destructive inspection are qualified, hydraulic test is carried out. Finally, the assembly quality of the converter pipeline is determined according to the hydraulic test results, including: After the reformer pipeline is assembled, a visual inspection is carried out first. The visual inspection is to clean the pipeline surface and check whether the weld has cracks, lack of fusion, lack of penetration, slag inclusions, and pores. If visual inspection shows abnormalities, the reformer pipes will be processed; After the visual inspection is completed and no abnormalities are found, non-destructive testing is carried out. Non-destructive testing includes radiographic testing, ultrasonic testing, penetrant testing and magnetic testing; If the nondestructive testing shows abnormalities, the reformer pipes will be processed; After the nondestructive testing is completed and no abnormalities are found, a water pressure test is performed; The water pressure test is to fill the reformer pipe with industrial water and install an exhaust valve and a pressure gauge at the highest point of the reformer pipe; Use a water pump to slowly pressurize the container while observing the reading on the pressure gauge; If leakage or abnormality is found, pressurization should be stopped immediately; After reaching the maximum test pressure, close the water pump inlet valve and record the pressure drop; The tightness of the reformer pipe is determined based on the pressure reduction speed and pressure reduction amount; The quality of the reformer pipe assembly is determined by the tightness.

[0035] Specifically, the comprehensive inspection from surface cleaning to internal structure includes visual inspection of the weld appearance and non-destructive testing of the weld internal defects. This comprehensive inspection method can maximize the discovery and elimination of potential quality problems and ensure the assembly quality of the converter pipeline. The inspection process is divided into three stages: visual inspection, non-destructive testing and water pressure testing. Each stage has clear inspection content and standards. This phased implementation method helps to carry out inspection work in an orderly manner, avoid omissions and duplications, and improve inspection efficiency. In the water pressure testing stage, the sealing of the converter pipeline is scientifically judged by filling industrial water, installing exhaust valves and pressure gauges, slowly pressurizing, and observing the pressure gauge readings. At the same time, the assembly quality of the pipeline is accurately evaluated according to parameters such as the pressure reduction speed and pressure reduction amount, providing a reliable basis for subsequent acceptance and use. Through comprehensive inspection and evaluation, potential safety hazards such as cracks, lack of fusion, lack of penetration and other welding defects and sealing problems such as leakage are discovered and eliminated in a timely manner, improving the safety performance of the converter pipeline.

[0036] Specifically, before using a water pump to slowly pressurize the container, a pressurization gradient is set, and after the pressurization gradient is set, the water pump is used to slowly pressurize the container according to the pressurization gradient, including: Extracting the current air content volume of the reformer duct; Extracting the current pipe temperature of the reforming furnace pipe and the maximum value of the theoretical change of the pipe temperature during the pressurization process under ideal environmental conditions; The pressurization gradient parameter is obtained by using the current air content volume of the reformer pipeline, the current pipeline temperature of the reformer pipeline, and the maximum amplitude value of the pipeline temperature change during the pressurization process under ideal environmental conditions in theory; The pressure gradient parameter is obtained by the following formula: Where F represents the pressure gradient parameter; V a Indicates the current air content volume of the reformer duct; V m Indicates the filling volume of industrial water in the current reformer pipeline; T d Indicates the current temperature of the reformer pipeline; ΔT indicates the maximum value of the change in pipeline temperature during the pressurization process in theory under ideal environmental conditions; The pressurization gradient parameter is used in combination with the material, wall thickness and volume of the reformer pipe to set the pressurization gradient value.

[0037] The technical effect of the above technical solution is that by extracting the current air content volume of the reformer pipeline, the pipeline temperature and the maximum amplitude value of the pipeline temperature change during the pressurization process in theory, the technical solution can more accurately calculate the pressurization gradient parameter. This precise pressurization gradient setting helps to avoid overpressure or underpressure, thereby improving the safety of the pressurization process.

[0038] Using the pressurization gradient parameter combined with the material, wall thickness, and volume of the converter pipe to set the pressurization gradient value can ensure a more efficient pressurization process. By optimizing the pressurization gradient, the time required for pressurization can be reduced while ensuring the stability and reliability of the pressurization process. This technical solution takes into account the current state of the converter pipe (such as air content, temperature) and the temperature changes under ideal conditions, so that the pressurization process can adapt to different working environments and conditions. This adaptability and flexibility makes this technical solution widely applicable to different industrial scenarios and pressurization needs.

[0039] By accurately calculating the pressurization gradient parameters and setting the pressurization gradient values ​​accordingly, fluctuations and uncertainties in the pressurization process can be reduced. This helps to improve the stability and reliability of the entire pressurization system, thereby ensuring the smooth progress of industrial production.

[0040] In summary, this technical solution provides a more efficient, safe and reliable technical solution for the industrial pressurization process by improving the accuracy and safety of the pressurization process, optimizing the pressurization efficiency, enhancing the adaptability and flexibility of the system, and improving the overall stability and reliability of the system.

[0041] Specifically, the pressurization gradient parameter is used in combination with the material, wall thickness and volume of the reformer pipe to set the pressurization gradient value, including: Retrieving material data of the reformer pipeline; Obtaining the yield strength corresponding to the material of the reformer pipe through the material data of the reformer pipe; Extracting the pipe wall thickness and pipe volume of the reformer pipe; Extracting a pressurization gradient parameter, and using the pressurization gradient parameter in combination with the yield strength, pipe wall thickness, and pipe volume corresponding to the material of the reformer pipe to obtain a pressurization gradient value; The pressure gradient value is obtained by the following formula: Where G represents the pressure gradient value; σ y represents the yield strength of the material of the reformer pipe; t represents the pipe wall thickness; V represents the pipe volume; P max represents the maximum test pressure; C represents the safety factor; and the safety factor is obtained by the following formula: Where C is the safety factor; σ y Indicates the yield strength of the material of the reformer pipe; σ d Indicates the maximum stress that the pipeline material is expected to withstand under actual operating conditions; F 01 Indicates the correction factor of material properties, with a value range of 0.7-1.0; w 01 Indicates the weight value corresponding to the correction factor of material properties; F 02 Indicates the correction factor of operating conditions, with a value range of 0.5-1.0; w 02 Indicates the weight value corresponding to the correction factor of the operating conditions; F 03 Indicates the correction factor of historical data, and its value range is 0.8-1.0; w 03 Indicates the weight value corresponding to the correction factor of historical data; F 04 represents the correction factor of risk management, and its value range is 0.5-1.0; w 04 Indicates the weight value corresponding to the risk management correction factor.

[0042] Specifically, the correction factor F for material properties is 01 Value range: 0.7 - 1.0: Explanation: 0.9 - 1.0: The material properties are very stable, with excellent fatigue resistance, corrosion resistance and other properties, suitable for high-quality and high-reliability materials.

[0043] 0.8 - 0.9: The material has some defects or the characteristics are not as stable as expected, but are still within the acceptable range.

[0044] 0.7 - 0.8: The material properties are poor, fatigue, corrosion and other problems may exist, and a higher safety factor is required.

[0045] Among them, the correction factor F of the operating conditions 02 Value range: 0.5 - 1.0; Explanation: 0.9 - 1.0: The operating conditions are very stable, and the changes in operating parameters such as temperature and pressure are small and controllable.

[0046] 0.7 - 0.9: There is a certain uncertainty in the operating conditions, such as temperature fluctuations, pressure changes, etc.

[0047] 0.5 - 0.7: Severe or variable operating conditions may result in significant increases in stress on the material.

[0048] Among them, the correction factor F of historical data 03 Value range: 0.8 - 1.0; Explanation: 0.9 - 1.0: Historical data shows that this type of system runs stably and the probability of failure is extremely low.

[0049] 0.8 - 0.9: Historical data indicates that the system has had some failures but is generally reliable.

[0050] Among them, the risk management correction factor F 04 Value range: 0.5 - 1.0 Explanation: 0.9 - 1.0: Risks are controllable, safety measures are sound, and risk management is in place.

[0051] 0.7 - 0.9: There is a certain risk, which may be caused by operational errors, external environment or other uncertain factors.

[0052] 0.5 - 0.7: The risk is relatively high. There may be greater operational risks or external threats, and a higher safety factor is required to deal with it.

[0053] The technical effect of the above technical solution is: by comprehensively considering the material properties, wall thickness, volume and pressurization gradient parameters of the converter pipeline, the technical solution can more accurately calculate the pressurization gradient value. The introduction of safety factors and consideration of multiple correction factors such as material properties, operating conditions, historical data and risk management further enhance the safety of the pressurization process. The technical solution takes into account the impact of different material properties, operating conditions, historical data and risk management on the pressurization process, so that the setting of the pressurization gradient value is more in line with actual working conditions. This adaptability and flexibility makes the technical solution widely used in different industrial scenarios and pressurization needs.

[0054] By accurately calculating the pressure gradient value, the fluctuation and uncertainty in the pressure process can be reduced, thereby improving the pressure efficiency. Reasonable pressure gradient value setting helps to reduce the pressure time and improve production efficiency. This technical solution sets the pressure gradient value by taking into account multiple factors, which helps to reduce failures caused by material fatigue, corrosion or changes in operating conditions. This helps to improve the stability and reliability of the entire pressure system and ensure the smooth progress of industrial production.

[0055] In summary, this technical solution provides a more efficient, safe and reliable technical solution for the industrial pressurization process by improving the safety of the pressurization process, enhancing the adaptability and flexibility of the system, optimizing the pressurization efficiency, and improving the overall stability and reliability of the system.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A modular assembly method for a reformer pipe, characterized in that: The steps include: S1: Preparation of reformer pipeline drawings and process documents: obtaining the proposed pipeline drawings and process documents from the database, and printing and dividing the proposed pipeline drawings and process documents; S2: Process document and material acceptance: According to the printed and divided pipeline drawings and process documents, the provided materials will be inspected, and after the inspection, the material acceptance report and quality assurance certificate will be obtained; S3: Construction personnel training: training and examination of construction personnel according to pipeline drawings and process documents, and confirmation of construction date based on the results of training and examination; S4: Spot welding of the converter pipeline: The construction personnel weld the converter pipeline according to the pipeline drawings and process documents. At the same time, the welding process of the converter pipeline is supervised and inspected; S5: Assembling the reformer pipeline: After the reformer pipeline is welded, the pipelines are assembled in sequence; S6: Inspection and testing of converter pipelines: After the converter pipelines are assembled, they are subjected to visual inspection and non-destructive testing in turn. After both visual inspection and non-destructive testing are qualified, a water pressure test is carried out. Finally, the assembly quality of the converter pipelines is determined based on the water pressure test results.

2. The modular assembly method of the reformer pipe according to claim 1, characterized in that: In S1, the proposed pipeline drawings and process documents are obtained from the database, and the proposed pipeline drawings and process documents are printed and divided, including: The pipeline drawing of the reformer divides the reformer pipeline into a radiation section module and a convection section module; The radiation section module is located in the high-temperature radiation zone of the reformer furnace. The radiation zone is an area that uses the radiation heat of flames and high-temperature flue gas to heat the pipeline and the materials in the pipeline. The radiation zone includes the steel structure shell, internal pipelines and support frames. The convection section module is located in the convection zone of the reformer furnace. The convection zone is an area that uses the convection effect of flue gas to transfer heat to the pipeline and the materials in the pipeline. The convection zone includes multiple preheaters and heat exchangers. The process documents include welding position diagram of converter pipe assembly, welding process specification, heat treatment process card, PMI inspection sheet, ferrite inspection sheet and ITP; The process documents and pipeline drawings are printed out using a printer and stored after printing.

3. The modular assembly method of the reformer pipe according to claim 2, characterized in that: The materials to be provided in S2 will be inspected, and after the inspection is completed, the acceptance report and warranty of the materials will be obtained, including: Acceptance of materials, including steel plates, steel pipes, pipe fittings, and welding materials. The material acceptance process is to inspect and check the material quality, specifications, and surface quality of the materials according to the pipeline drawings and process documents; Check the size of the pipe fittings, including the center distance of the 180-degree elbow, the fin length and the end tube length. The fin length and the end tube length should not be less than 100mm. The materials that have been inspected and checked are inspected, among which stainless steel 347 and heat-resistant steel Gr5 are respectively inspected for PMI, and 10% of the samples of stainless steel 347 and heat-resistant steel Gr5 are sampled for PMI inspection; Among them, PMI is used to test the Cr, Ni, and Nb elements in stainless steel 347; PMI is used to test the Cr and Mo elements in heat-resistant steel Gr5; After all materials are inspected, an acceptance report is prepared. At the same time, the welding materials in the materials are given a quality assurance certificate and color ribbon code; After the material preparation is completed, the pipeline drawings and process documents will be marked as documents to be issued.

4. The modular assembly method of the reformer pipe according to claim 3, characterized in that: In S3, construction personnel are trained according to pipeline drawings and process documents, and the construction date is confirmed based on the training results, including: Obtain pipeline drawings and process documents to be issued, and issue them to the construction team; Provide training and examination to construction personnel according to the welding position diagram and welding process specifications in the pipeline drawings and process documents; Arrange construction personnel according to training and examination results; The construction date will be confirmed after the construction personnel are arranged.

5. The modular assembly method of the reformer pipe according to claim 4, characterized in that: In S4, the construction personnel welded the converter pipeline according to the pipeline drawings and process documents. At the same time, the welding process was supervised and inspected, including: Confirm the spot welding method according to the material quality; Among them, the spot welding methods are divided into wedge block spot welding and in-break spot welding; When using wedge blocks for spot welding, the material of the wedge blocks and the welding materials for spot welding should be the same as those for the main material. After welding, the wedge blocks should be removed and the spot welding points should be ground off. When spot welding in groove is used, the welding materials for spot welding should be the same as those for regular welding. The spot welding points should be removed by grinding during the base welding. At the same time, when spot welding in groove is used, ensure that the spot welding seam has no defects, including cracks and pores. Among them, when the spot welds cannot be ground due to space constraints, the spot welds of the wedge blocks and the spot welds in the gaps are regarded as part of the formal welds and are retained.

6. The modular assembly method of the reformer pipe according to claim 5, characterized in that: In S4, the construction personnel welded the reformer pipeline according to the pipeline drawings and process documents. At the same time, the welding process of the reformer pipeline was supervised and tested, including: When welding materials, welding shall be carried out according to the welding procedure specification. At the same time, the welding preheating temperature shall be monitored according to the welding procedure specification and ASME; During the welding process, the interlayer temperature of stainless steel 347 and heat-resistant steel Gr5 is controlled, wherein the interlayer temperature of stainless steel 347 is less than 150 degrees, and the interlayer temperature of heat-resistant steel Gr5 is less than 300 degrees; After the base welding is completed, the branch pipe platform is self-checked. The root of the branch pipe platform is in a weld-through state. If the branch pipe platform is not formed at all, the root of the branch pipe platform is filled and covered; After welding is completed, the joint surface is inspected. If there are surface cracks, incomplete penetration, lack of fusion, surface pores, arc pits, unfilled, undercuts, slag inclusions and spatter on the joint surface, the joint is marked as an abnormal joint and reprocessed; There should be a smooth transition between the weld and the parent material, and the shape of the fillet weld should be concave and smooth; After welding is completed, a steel stamp is printed around the joint; After the branch pipe platform is welded, it is assembled. The assembly methods include socket type and sitting type, and the welding gap is adjusted. At the same time, the branch pipe platform is filled and covered after the base welding; After welding is completed, stainless steel 347 and heat-resistant steel Gr5 are immediately heat treated, wherein stainless steel 347 is subjected to stabilization heat treatment and heat-resistant steel Gr5 is subjected to stress relief heat treatment; If heat treatment cannot be performed immediately, use insulation cotton to wrap the weld for slow cooling; If the material is repaired after welding, it shall be heat treated again after repair, and the relevant process of reheat treatment shall be recorded; When performing manual welding, the welding rod should be kept at a temperature of 100 to 150 degrees before welding; During welding, the thickness of each weld layer should be controlled within 4-5mm, and the swing amplitude should not exceed 3 times the diameter of the welding rod.

7. The modular assembly method of the reformer pipe according to claim 6, characterized in that: After the S5 reformer pipeline welding is completed, the pipeline assembly is carried out in sequence, including: Divide the radial section pipeline into eight independent pipe groups, each of which is set to be 3 meters wide and 13 meters long; Divide the cylindrical pipeline into eight independent pipe groups, each of which is set to be 2.5 meters wide and 13 meters long; The convection section pipeline is modularly prefabricated on the ground to form a U-shaped tube bundle module. One side of each module is set at 90 degrees and 270 degrees as a fixed port. The module is divided into two layers and manufactured separately. After each layer of modules is welded, heat treated and non-destructive testing is completed, the splicing and connection ports are welded. The welding work of the convection section is carried out in batches in conjunction with arc-shaped special tooling.

8. The modular assembly method of the reformer pipe according to claim 7, characterized in that: After the S6 converter pipeline is assembled, visual inspection and non-destructive inspection are carried out in turn. After both visual inspection and non-destructive inspection are qualified, hydraulic test is carried out. Finally, the assembly quality of the converter pipeline is determined according to the hydraulic test results, including: After the reformer pipeline is assembled, a visual inspection is carried out first. The visual inspection is to clean the pipeline surface and check whether the weld has cracks, lack of fusion, lack of penetration, slag inclusions, and pores. If visual inspection shows abnormalities, the reformer pipes will be processed; After the visual inspection is completed and no abnormalities are found, non-destructive testing is carried out. Non-destructive testing includes radiographic testing, ultrasonic testing, penetrant testing and magnetic testing; If the nondestructive testing shows abnormalities, the reformer pipes will be processed; After the non-destructive testing is completed and no abnormalities are found, a water pressure test is performed; The water pressure test is to fill the reformer pipe with industrial water and install an exhaust valve and a pressure gauge at the highest point of the reformer pipe; Use a water pump to slowly pressurize the container while observing the reading on the pressure gauge; If leakage or abnormality is found, pressurization should be stopped immediately; After reaching the maximum test pressure, close the water pump inlet valve and record the pressure drop; The sealing performance of the reformer pipeline is determined based on the pressure reduction speed and pressure reduction amount; The quality of the reformer pipe assembly is determined by the tightness.

9. The modular assembly method of the reformer pipe according to claim 8, characterized in that: Before using a water pump to slowly pressurize the container, a pressurization gradient is set, and after the pressurization gradient is set, the water pump is used to slowly pressurize the container according to the pressurization gradient, including: Extracting the current air content volume of the reformer duct; Extracting the current pipe temperature of the reforming furnace pipe and the maximum value of the theoretical change of the pipe temperature during the pressurization process under ideal environmental conditions; The pressurization gradient parameter is obtained by using the current air content volume of the reformer pipeline, the current pipeline temperature of the reformer pipeline, and the maximum amplitude value of the pipeline temperature change during the pressurization process under ideal environmental conditions in theory; The pressurization gradient parameter is obtained by the following formula: Where F represents the pressure gradient parameter; V a Indicates the current air content volume of the reformer duct; V m Indicates the filling volume of industrial water in the current reformer pipeline; T d Indicates the current temperature of the reformer pipeline; ΔT indicates the maximum value of the change in pipeline temperature during the pressurization process in theory under ideal environmental conditions; The pressurization gradient parameter is used in combination with the material, wall thickness and volume of the reformer pipe to set the pressurization gradient value.

10. The modular assembly method of the reformer pipe according to claim 9, characterized in that: The pressurization gradient parameter is used in combination with the material, wall thickness and volume of the reformer pipe to set the pressurization gradient value, including: Retrieving material data of the reformer pipeline; Obtaining the yield strength corresponding to the material of the reformer pipe through the material data of the reformer pipe; Extracting the pipe wall thickness and pipe volume of the reformer pipe; Extracting a pressurization gradient parameter, and using the pressurization gradient parameter in combination with the yield strength, pipe wall thickness, and pipe volume corresponding to the material of the reformer pipe to obtain a pressurization gradient value; The pressure gradient value is obtained by the following formula: Where G represents the pressure gradient value; σ y represents the yield strength of the material of the reformer pipe; t represents the pipe wall thickness; V represents the pipe volume; P max represents the maximum test pressure; C represents the safety factor; and the safety factor is obtained by the following formula: Where C is the safety factor; σ y Indicates the yield strength of the material of the reformer pipe; σ d Indicates the maximum stress that the pipeline material is expected to withstand under actual operating conditions; F 01 Indicates the correction factor of material properties, with a value range of 0.7-1.0; w 01 Indicates the weight value corresponding to the correction factor of material properties; F 02 Indicates the correction factor of operating conditions, with a value range of 0.5-1.0; w 02 Indicates the weight value corresponding to the correction factor of the operating conditions; F 03 Indicates the correction factor of historical data, and its value range is 0.8-1.0; w 03 Indicates the weight value corresponding to the correction factor of historical data; F 04 represents the correction factor of risk management, and its value range is 0.5-1.0; w 04 Indicates the weight value corresponding to the risk management correction factor.

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