The meaning of Para 302.2.4 is that the actual temperature is allowed to exceed the design temperature used by the levels quoted. It has nothing to do with Table A1-M.
Para. 302.2.4 is about use of materials above a temperature or pressure to which any item is designed(/'rated')
Para. 323.2.1 allows materials to be used above temperatures that are listed in table A-1 (or A-1M) in the "Max. Use Temp., °C" column.
Please be aware of the difference between these 2 paragraphs.
well, thank you first for the reply, and here is my story:
a piece of pipe to be constructed of SB-575 (UNS-N06200).
Max Operating Temp. is 932 DEG F
Designe Pressure is 2.2 PSIG
if i want to go with Para 323.2.1 to exceed tha Max use temp. listed in table A1-M (800 DEG F)i should first confirm that there is no prohibition in Appendix A.
My question is how to confirm if there is no prohibition in Appendix A?
