Thermal stress issue?
Thread Content
How to consider thermal stress under internal pressure? Internal pressure heating: The stress on the inner wall decreases, while the stress on the outer wall increases, and the stress state may deteriorate. When △t≤1.1P, the influence of thermal stress can be ignored. Among them, △t≤1.1P, △t is the temperature change, and the unit should be℃ ； And p is pressure, the unit is MPa or kg/cm^2
May I ask where this sentence comes from?
I don't quite understand the original poster's question. Pressure vessels operating at very high temperatures are subject to thermal stress. During the hydraulic pressure test, the service strength of the vessel under high temperature has been simulated and tested through the temperature coefficient. If the temperature fluctuates and rises and falls periodically according to certain rules, then you need to check according to 4732. Is fatigue analysis design exempted?
This problem is not a test pressure problem at all