The container is sealed and operates at normal pressure at a temperature of -5°C to -10°C; what material should be used?
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The container is sealed at atmospheric pressure, with a temperature ranging from -5°C to -10°C. What material should be used?
Low-temperature resistant steel is the best choice; ordinary carbon steel cannot be used for long periods.
Q245R and Q345R are both acceptable
Can Q245 and Q345 be used?
Since the medium inside the container is not specified, it is impossible to determine the material. Material selection is based solely on temperature: ordinary carbon steel can be used, as temperatures ranging from -5°C to -10°C can be considered normal, while temperatures below -20°C require consideration of low-temperature conditions.
When selecting materials, in addition to temperature, factors such as the medium and pressure also need to be considered...
Under normal circumstances, Q245R or Q345R can be selected.
Ordinary solvents are non-corrosive. The standards for steel pressure vessels at normal pressure specify that Q235ABC is the appropriate material for such vessels at normal pressure, with a minimum operating temperature of 0°C; however, it does not state what material should be used at lower temperatures
If the corrosivity is not very severe, Q245R is sufficient