Proof Pressure. What is it anyway?
Proof Pressure. What is it anyway?
(OP)
Is Proof Pressure a different test than a hydrostaic or pneumatic test for pressure vessel? What is it governed by with regards to testing requirements? 1.5 X MAWP or is it greater than that?
We bought an accumulator last year with the nameplate listing a MAWP of 3000psi and a proof pressure of 6000psi and a hydrostatic test rating of 4500 psi.
This year we are buying the same accumulator with a MAWP of 3000 but the proof pressure is said to be 4500 PSI (We haven't recieved it yet). Is their a std. with regards to proof pressure testing? Is it supposed to be 2X the MAWP? or can it be Lower or equal to say the hydrostatic test?
We bought an accumulator last year with the nameplate listing a MAWP of 3000psi and a proof pressure of 6000psi and a hydrostatic test rating of 4500 psi.
This year we are buying the same accumulator with a MAWP of 3000 but the proof pressure is said to be 4500 PSI (We haven't recieved it yet). Is their a std. with regards to proof pressure testing? Is it supposed to be 2X the MAWP? or can it be Lower or equal to say the hydrostatic test?





RE: Proof Pressure. What is it anyway?
Refer to UG-99, UG-100, and UG-101 of ASME VIII Div. 1.
Is your vessel a hydraulic accumulator?
RE: Proof Pressure. What is it anyway?
Apparently hydro test to 1989 code year is 1.5 X MAWP and 1.3 X MAWP to 2004 code year but i guess you are also supposed to multiply some stress intensification factor ration to these to get your hydro test number..
RE: Proof Pressure. What is it anyway?
That factor you are referring to is in UG-99(b). It is the lowest ratio of the stress value for the test temperature to the stress value for the design temperature.
RE: Proof Pressure. What is it anyway?