Pressure
vessel forgings refer to sealing equipment that contains gas or liquid and
bears a certain pressure. In order to carry out scientific management and
safety supervision more effectively, container installation is divided into
three categories: working pressure, medium hazard and its role in production.
In the design
and production process, various types of pressure vessels and inspection items,
content and methods have been made different regulations. The container
implements the import cargo safety and quality license system. Commodities that
have not obtained the import safety and quality license certificate shall not
be imported. According to the "Regulations for Safety Technical
Supervision of Fixed Pressure Vessels", it should be divided into the
first group of media and the second group of media.
Pressure vessel forgings are closed vessels that can withstand pressure. It has a wide range of uses and plays an important role in many sectors such as industry, civil affairs, military industry, and scientific research. Among them, the most widely used containers in the chemical and petrochemical industries, and the containers used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. Containers are mainly used in the chemical and petrochemical industries, such as heat transfer, mass transfer, reaction and other processes, as well as the storage and transportation of pressurized gas or liquefied gas. They are also widely used in other industrial and civil fields, such as air compressors. Pressure vessels of various types of special compressors and refrigeration compressors (coolers, buffers, oil-water separators, gas storage tanks, evaporative condensers, liquid coolers, etc.).
1. The production process of pressure vessel forgings is divided into: raw material acceptance process, marking process, cutting process, derusting process, processing (including edge planing) and other processes, rolling process, assembly process, welding process (product welding test plate ), non-destructive testing process, hole mark process, general inspection process, heat treatment process, pressure test process, anti-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 welding workpiece. First of all, the welding method must be determined, such as manual arc welding, submerged arc welding, tungsten argon arc welding, molten electrode gas shielded welding and so on. There are many welding methods, which can only be selected according to the specific situation. After the welding method is determined, the welding process parameters are determined, and the different welding process parameters are analyzed. For example, manual arc welding pressure vessels mainly include: electrode type, diameter, current, voltage, welding power source type, pole connection method, number of welding layers, number of channels, detection methods, etc.
