A pressure vessel is a closed vessel that can withstand pressure. The pressure vessel has a wide range of uses, and it plays an important role in many sectors such as industry, civil and military industry, as well as in many fields of scientific research. Most of them are used in the chemical industry and the petrochemical industry, and the pressure vessels used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. Pressure vessels in the chemical and petrochemical fields are mainly used in heat transfer, mass transfer, reaction, and other technological processes, as well as storage, and transport of pressure gas or liquefied gas; It is also widely used in other industrial and civil fields, such as air compressor. All kinds of special compressors and auxiliary machines of refrigeration compressors (coolers, buffers, oil-water separators, storage tanks, evaporators, liquid coolant storage tanks, etc.) are pressure vessels.

Pressure vessel manufacturing process

1. Pressure vessel manufacturing process generally can be divided into raw material acceptance process, line process, cutting process, cleaning process, machining (including edge planing, etc.) work procedure, groups, and rolled-to-work procedure (product welding test plate), welding, NDT process, opening line process, the general inspection procedure, and heat treatment process, pressure test process and corrosion process.

2. Different welding methods have different welding processes. The welding process is mainly determined according to the material, grade, chemical composition, structure type, and welding performance requirements of the welder. First of all, we should determine the welding method, such as hand arc welding, submerged arc welding, tungsten argon arc welding, MIG welding, and so on. There are many kinds of welding methods, which can only be selected according to the specific situation. After determining the welding method, the welding process parameters are formulated. The types of welding process parameters are different. For example, manual arc welding mainly includes electrode model (or brand), diameter, current, voltage, welding power supply type, polar connection method, welding layer number, channel number, inspection method, and so on.

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