Overpressure in Pressure Testing
Overpressure in Pressure Testing
(OP)
Hope some one can help.
I have been looking at the NORSOK Standard on Piping fabrication,install, flushing and testing (L-004)and section 8.3 Test Media makes the statement below.
"For pneumatic testing, the test media shall be oil free, dry air or any inert gas. The use of air for testing shall
be limited to a maximum pressure of 0,7 MPa overpressure. Above this pressure nitrogen shall be used. The
extent of pneumatic testing shall be approved."
Whats is meant by overpressure in this statement?
I have been looking at the NORSOK Standard on Piping fabrication,install, flushing and testing (L-004)and section 8.3 Test Media makes the statement below.
"For pneumatic testing, the test media shall be oil free, dry air or any inert gas. The use of air for testing shall
be limited to a maximum pressure of 0,7 MPa overpressure. Above this pressure nitrogen shall be used. The
extent of pneumatic testing shall be approved."
Whats is meant by overpressure in this statement?





RE: Overpressure in Pressure Testing
"Overpressure" is one of those terms that is almost always ambiguous and Standards-writers should be flogged for using it.
David Simpson, PE
MuleShoe Engineering
Law is the common force organized to act as an obstacle of injustice Frédéric Bastiat
RE: Overpressure in Pressure Testing
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Overpressure in Pressure Testing
David Simpson, PE
MuleShoe Engineering
Law is the common force organized to act as an obstacle of injustice Frédéric Bastiat
RE: Overpressure in Pressure Testing
+ Atmospheric pressure 14.5 psi =
Total Exterior pressure = 160.3 psia
Total exterior pressure = 1.10 MPaa
Not important how much air needs to be introduced, just the final differential pressure. So that looks like pneumatic tests are limited to 100 psiG maximum test pressure above or below the waterline.
I hate Windowz 8!!!!