Considerations regarding the materials of off-category containers in areas where the average monthly temperature during the coldest months is below -20 degrees Celsius
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Do the materials of off-category containers, for which the average monthly minimum ambient temperature is below -20 degrees, need to be considered for low-temperature conditions? Or at temperatures between -10 degrees and -20 degrees, is it necessary to perform low-temperature impact tests for Q345R and Q245R? The operating temperature of the medium is room temperature.. Thank you~~
Classification is for safety; failing to classify despite the pressure is just as dangerous. Whether to consider low temperatures depends on whether the equipment is at risk of low-temperature brittle fracture.
If low temperatures are not desired, could insulation be considered?
Check whether it falls under low-temperature and low-stress operating conditions
By \"outside the category\" here, it is referred to conditions in which the pressure is at atmospheric level or very low; as a result, the circumferential film stress calculated should be quite small – less than 1/6 of the steel’s standard yield strength at room temperature, and not exceeding 50 MPa.
This post was last edited by zhangjuhua on 2018-7-10 at 18:05. It involves low temperature and low stress, but it’s very likely that such conditions can be met as well:lol
It is determined by the design, taking into account its stress level