What are the standards adopted in the manufacture of cryogenic tanks?

At present, there is no special standard for the manufacture of low temperature gas cylinders and pressure vessels in China. China's JB4732 does not divide the temperature limits between low temperature and normal temperature.

1. Regulations for safety technical supervision of pressure vessels;

2. Steel pressure vessel (GB150-1998)

3, JB4732 "steel pressure vessel analysis and design standards"

4, GB3531 "low temperature pressure vessel steel plate"

GB150: because of low temperature and low stress conditions are defined, refers to the low temperature operating conditions, the circumferential stress is less than 1/6 of the yield point of steel at room temperature, and < 50MPa working condition; in the low stress condition ", if the design temperature plus 50 degrees higher than the temperature of -20 DEG C then, do not have to follow the relevant provisions of low temperature pressure vessel; if the design temperature adjusted less than or equal to -20 degrees, according to the relevant provisions of the low temperature pressure vessel design temperature adjusted. The impact test temperature also is less than or equal to the adjusted design temperature.;" low stress condition "is not applicable to the standard tensile strength of steel the lower limit value of cryogenic vessels is greater than 540MPa;" the design temperature range for 1.2 of this standard by the use of temperature steel allowed. "And so on; and" low temperature pressure vessel for carbon steel and low alloy steel forgings "(JB 4727-94) Accessories

In addition, our country has now:

"JB/T4734-2002" is the first container welding aluminum content of the domestic complete (including design, material selection, manufacturing and inspection) aluminum pressure vessel standard. Including the pressure vessel and pressure vessel. Also contains aluminum and aluminum lining two welded container. Design pressure is less than 8MPa, the use of the temperature limit is -269 degrees.

JB/T4755 "copper pressure vessel", the standard for key materials and manufacturing, the structure, copper and strength calculation of pressure vessel steel is similar to that of the part of the contents of the GB150. are a reference to the evaluation of welding process and product welding test plate parts are references to relevant regulations and standards for the special requirements of copper to make supplementary provisions to the standard. Will further improve the design, manufacture and use of copper pressure vessels. The standard is applicable to the design pressure is less than 35MPa, the design of temperature by using temperature of copper and composite steel plate and allowed the determination of the temperature of not less than 198. Usually use C to copper welded joints and no special requirements, when temperature is lower than the 198 C should ensure that still have good tensile elongation.

J B/T4756 "nickel and nickel alloy pressure vessel made of nickel and nickel alloy pressure vessels", the standard for key materials and manufacturing, the structure, nickel and nickel alloy steel pressure vessel strength calculation and similar contents of this part are a reference to the GB150. evaluation of welding process and product welding test plate parts are cited regulations and standards only for the special requirements of copper to make supplementary provisions. This standard will further increase of nickel and nickel alloy design, pressure vessel manufacture and use. This standard applies to the design pressure is less than 35MPa, the design of temperature according to the temperature of copper clad steel plate material and allow the determination of the commonly used temperature not less than -. 198 degrees of nickel and nickel alloy material and welded joint has no special requirements when using the temperature lower than 198 DEG C should ensure that still has good tensile elongation.

In "steel pressure vessel" (GB150-1998) in 6.1.1 manufacturing for low temperature pressure vessel materials shall be in accordance with the fourth chapter of the.6.1.2 manufacturing pressure components for low temperature pressure vessel steel plate by vessel manufacturing units in accordance with the requirements of article 4.7.4 to reinspect the low temperature impact toughness.

China's JB4732 does not distinguish the temperature range between low temperature and normal temperature

9%Ni steel plate for low temperature pressure vessel (GB24510-2009)

This standard specifies the ordering content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, signs and quality certificates of 9%Ni steel plate for low temperature pressure vessel

This standard is applicable to the manufacture of 9%Ni steel plates with a thickness of not greater than 50mm for the manufacture of liquefied natural gas (LNG) tanks, liquefied natural gas (LNG) vessels and other low temperature pressure vessels