Judgment: When the design temperature is -25 degrees Celsius, can Q345R material be used for the steel plates of the pressure vessel shell?
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Can Q345R material be used for the steel plates of pressure vessel shells when the design temperature is -25 degrees Celsius?
It is absolutely not allowed, unless under conditions of low temperature and low stress.
I agree with you, but it must also be related to the thickness.
When meeting the low-temperature bottom stress conditions, are factors such as impact also taken into account, or is it treated as a non-low-temperature vessel?
It is possible to meet the conditions of low temperature and low stress.
The minimum operating temperature for Q345R as specified in GB/T150 has already been exceeded; what relevance does thickness have at this point?
“What does the “low-temperature bottom stress condition” refer to, and is there any source for it? The temperature has exceeded the range specified in GBT150 – why is use of :Q still allowed?
It turns out I learned about it in Appendix E of GBT150.3 as well. However, the explanation provided in the standards for low-temperature and low-stress conditions is not clear; how exactly should one determine these conditions?