Hydrostatic shell test pressure
Hydrostatic shell test pressure
(OP)
Greetings!
Referring to API 6D, para. 9.3: "the test pressure shall be 1.5 or more times the pressure rating determined in accordance with 5.2 for material at 100 deg F (38 deg C)"; if I am to run a pressure test on a 2" 150 Ball Valve, A105 material with 150 deg C pressure rating, which gives me a working pressure of 17.7 bar (ASME B16.34), will my pressure test be 1.5 x 17.7 bar or 1.5 x 19.6 bar (which is the pressure rating at 38 deg C) ?
Recently we have been audited by a client and they said that our test pressure is wrong because we used the "1.5 x 19.6 bar" instead of "1.5 x 17.7 bar". Now I am confused. Kindly help.
Referring to API 6D, para. 9.3: "the test pressure shall be 1.5 or more times the pressure rating determined in accordance with 5.2 for material at 100 deg F (38 deg C)"; if I am to run a pressure test on a 2" 150 Ball Valve, A105 material with 150 deg C pressure rating, which gives me a working pressure of 17.7 bar (ASME B16.34), will my pressure test be 1.5 x 17.7 bar or 1.5 x 19.6 bar (which is the pressure rating at 38 deg C) ?
Recently we have been audited by a client and they said that our test pressure is wrong because we used the "1.5 x 19.6 bar" instead of "1.5 x 17.7 bar". Now I am confused. Kindly help.
Thanks!





RE: Hydrostatic shell test pressure
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Hydrostatic shell test pressure
Yes, was in need of assurance!
Thanks!
RE: Hydrostatic shell test pressure
it is such a common problem in valves
we handled this problem in شیرآلات قهرمان very easy
RE: Hydrostatic shell test pressure
Your client clearly does not understand ASME pressure classes, which have different pressure ratings depending on the operating temperature. You may need to explain that because the hydrostatic shell test is done at room temperature, it needs to be based on the room-temperature pressure rating.
By the way, the pressure rating for Class 150 with A105 material at 150C is actually 15.8 bar and not 17.7 bar (that's for 100C).
RE: Hydrostatic shell test pressure
Thanks for the correction!
Thanks!