How to choose pressure vessels

A pressure vessel is a closed container that can withstand pressure. Pressure vessels have a wide range of applications, playing an important role and position in many sectors such as industry and civil use, as well as in many fields of scientific research. Among them, pressure vessels are most commonly used in the chemical and petrochemical industries, accounting for about 50% of the total number of pressure vessels used in the petrochemical industry alone. Pressure vessels are located in the chemical and petrochemical industry, mainly used for heat and mass transfer, reaction and other process processes, as well as for storing and transporting pressurized gases or liquefied gases; It is also widely used in other industrial and civil fields, such as air compressors. The auxiliary equipment of various compressors and refrigeration compressors (such as coolers, buffers, oil-water separators, gas storage tanks, evaporators, liquid refrigerant storage tanks, etc.) are all pressure vessels qhp bladder accumulator catalogue.

When selecting pressure vessel materials, it is necessary to consider the working conditions of the vessel, such as temperature, pressure, and medium characteristics; The performance of materials, such as mechanical, physical, and chemical properties; Processing performance, such as the welding performance and cold and hot processing performance of materials; Economically reasonable performance, such as material prices, manufacturing costs, and service life.

  1. The materials used for pressure vessels should be selected according to the materials listed in the national standard “Pressure Vessels”. The standard stipulates that the design pressure shall not exceed 35MPa. For those exceeding the specified value, specific analysis and testing shall be conducted, and a decision shall be made after research bladder accumulator diagram.
  2. The usage temperature of steel shall not exceed the upper limit temperature corresponding to the allowable stress of each steel grade. However, it should be noted that when carbon steel and carbon manganese steel are used for a long time above 425 ℃, the graphitization tendency of carbides in the steel should be considered. When the operating temperature of austenitic steel is higher than 525 ℃, the carbon content in the steel should not be less than 0.04%. For materials used in low-temperature containers below -20 ℃, Charpy V-notch impact tests should also be conducted.
  3. The quality and specifications of steel used for pressure components in pressure vessels shall comply with the corresponding national standards, ministerial standards, and relevant technical requirements, and shall be refined by open hearth, electric furnace, or oxidation furnace. Steel manufacturers must ensure quality and provide quality certificates. The certificate should list the furnace number, batch number, measured chemical composition and mechanical properties (values may not be provided for austenitic stainless steel), as well as the melting and heat treatment status.
  4. Steel used for non pressure components of pressure vessels must have good weldability bladder accumulator design.

When considering the sufficient strength of pressure vessel pressure components, their toughness must be considered to prevent brittle failure under external loading.