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Valve pressure calculation at higher temperature (to be used for thickness calculation)

Valve pressure calculation at higher temperature (to be used for thickness calculation)

Valve pressure calculation at higher temperature (to be used for thickness calculation)

(OP)
Hello,

I need to calculate the thickness of gate valve for unlisted material based on ASME B31.3 - 304.1.
In this case as the valve is unlisted I don't have the related pressure to consider for the equation.

My question is that how can I calculate pressure for each temperature (100F, 200F,...)?
Is there any way to calculate pressure based on stress values for each temperature?

thank you,

MRSohrabi;
Materials and Welding Eng.

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