What standards are used in the manufacturing of low-temperature pressure vessels

What standards are used in the manufacturing of low-temperature pressure vessels

The manufacturing of low-temperature pressure vessels should follow the standards of "Pressure Vessels Part 4: Manufacturing and Inspection". Specifically, the general 

requirements for manufacturing and inspection include:

For low-temperature pressure vessels made of austenitic stainless steel with a design temperature below -196 ° C, manufacturing and inspection shall comply with the 

requirements of the current national standard "Pressure Vessels Part 4: Manufacturing and Inspection". ‌

For low-temperature pressure vessels made of 9% Ni steel and austenitic stainless steel with a design temperature below -196 ° C, manufacturing and inspection should be 

jointly followed by all parties involved in the construction. ‌The materials used for manufacturing low-temperature pressure vessels shall comply with the requirements of 

Chapter 4 of Part 4: Manufacturing and Inspection of Pressure Vessels. ‌

The steel plates used for manufacturing pressure components of low-temperature pressure vessels should be retested for low-temperature impact toughness by the vessel 

manufacturing unit in accordance with the requirements of 4.0.5. ‌Welding materials used for manufacturing low-temperature pressure vessels should undergo retesting of the 

diffusion hydrogen content of the deposited metal in batches, in accordance with the requirements of 4.0.7. ‌

In addition, the design and manufacturing of low-temperature pressure vessels also need to consider the selection of materials. For example, low-alloy steel with refined 

grain treatment can be used up to -45 ° C, 2.5% nickel steel can be used up to -60 ° C, 3.5% nickel steel can be used up to -104 ° C, and 9% nickel steel can be used up to 

-196 ° C. When the temperature is below -196 ° C, materials such as austenitic stainless steel and aluminum alloy can be used