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Program control: The program control in pressure vessel manufacturing mainly includes: drawing review–technical briefing and vessel layout–material re-inspection and marking transfer–cutting and assembly–welding, test plate welding and physical/chemical testing–non-destructive testing–heat treatment–pressure testing–final product inspection. Drawing review ⑴: Check whether the design unit has the necessary design qualifications ； ⑵Check whether the main parameters of the pressure vessels in the drawings comply with **regulatory and standard requirements ； ⑶Check whether the dimension markings in the drawings are present or not ； ⑷Whether dimension and material changes are required. Technical instructions: ⑴ Technical instructions shall be provided based on the manufacturing challenges identified during the review of the drawings, as well as the points that require special attention during the manufacturing process, in order to avoid errors and resulting waste ； ⑵The positions of the weld seams on the container are arranged according to the hole locations indicated on the sheets and drawings, in compliance with **standards and relevant regulatory requirements. For example: regulations and standards such as the Code of Practice and Pressure Vessels. Re-inspection of materials and transfer of markings ⑴: Check whether the surface quality of the materials supplied by the vendor meets the required standards, and also verify that the material quality certificates comply with relevant regulations and standard requirements ； ⑵, determine whether the chemical composition and mechanical properties of the material meet the standard requirements ； The steel used for pressure vessels emphasizes three performance criteria: strength, plasticity, and toughness ； ⑶It is mainly to facilitate the traceability of material usage. According to the provisions on manufacturing and inspection in GB/T150.4, the material must undergo marking transfer. Material feeding and alignment: ⑴ Check whether the layout of the head welds, the depth of the head after pressing, and the degree of ellipticity meet the standard requirements ； ⑵Check whether the specific dimensions of the test cylinder body and the shape of the groove were determined in accordance with the drawings and layout plans ； ⑶Inspect the coiled cylinder to ensure its roundness meets the standard requirements ； ⑷While ensuring roundness, the components are aligned according to the layout diagram so that their misalignment values meet the standard requirements. The placement of welds is also determined based on this layout diagram. The quality of alignment is a prerequisite for successful welding; it affects whether the stress in the joint can reach an optimal level, that is, maximum balance. Therefore, accurate alignment is extremely important. ⑸Check whether the straightness tolerance meets the standard requirements. Welding, test plate welding, and physical and chemical testing: Welding is the most important step in the manufacture of pressure vessels, and it is crucial for determining their safety; therefore, controlling the welding process is particularly important. ⑴Based on the container material, weld procedure qualification is carried out in accordance with relevant standards to determine appropriate welding parameters ； ⑵Qualified welders are selected based on the welding process to carry out the welding work ； Control the welding environment. ⑶Control the excess height of the weld, the length of undercut, and the height of the weld corner to meet the requirements of the process evaluation ； ⑷Physical and chemical tests are conducted on the fabricated welding test plates to evaluate the welding properties as well as the weldability of the steel plates. Non-destructive testing: (1) Personnel involved in non-destructive testing undergo training provided by the relevant departments and work with valid certificates ； ⑵Ensure that the welded joint meets the requirements of the drawings and relevant standards through testing methods. Heat treatment: The equipment is subjected to heat treatment using specialized large-scale heat treatment devices. The basis for inspection is the heat treatment curve. Voltage withstand test: ⑴ Use a pressure gauge that meets the standard requirements and has passed inspection, and whose measurement range is sufficient ； ⑵The temperature of the test medium and the ambient temperature during the voltage withstand test meet the requirements of ** standards ； ⑶After the pressure test is confirmed to be successful by the manufacturing inspection personnel, it is reported to the personnel from the quality and technical supervision department for on-site inspection; if it meets the requirements for a successful pressure test for pressure vessels, then the test is deemed successful. Final product inspection: Once the product has been fully manufactured, it is subjected to rust removal, painting, and packaging, in compliance with the requirements of JB/T4711-2003 \"Coating, Packaging, and Transportation of Pressure Vessels\".