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During a pressure test of a HRSG with demin water, if the following was true; P = 50 barg Temp = 30 Deg C Volume = 60 m3 What effect on pressure would a 5 degree drop in temperature have. How is this calculated. Also, assuming no temperature drop, if there was a drop in pressure of 5 barg...

Thanks for the responses. The piping is GRP, however we have agreed that for pressure testing that we will go along with B31.1. So no PWHT required.

Possibly a very stupid question, but I am looling for some opinions. A section of pipework is due to be pressure tested according to ASME B31.1, and there are 2 flanged valves not yet installed as they have not been delivered. How would one define the limits of the pressure test for the...

How does API STD 598 fit in with ASME/ANSI. Is there any requirement under ASME B31.1 or 31.3?

When purchasing valves from a valve company is leak testing of valves by a supplier usual practice or a requirement of a standard? (Not pressure testing, just checking if there is any leakage over the valve seat at MAWP or MOP). If it is normal practice to leak test valves, would it be...