Richard,
Thanks for replying!
In their report:
1) The material used is ASTM A312 TP304H.
2) The ASME B31.3(2002) version is referred.
3) The temperature is around 1400 Degree F.
4) The hot allowable shown in their report is 20000 psi.
ASME B31.3 version 2008 gives hot allowable at this temperature to be 2.4 ksi. So my question :Did ASME code give 20 ksi as hot allowable in version 2002? If yes, how drastically the code revised the allowable for this material!!!!!
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Shahid Rafiq