Hydrostatic pressure Test for pipes
Hydrostatic pressure Test for pipes
(OP)
Hi Everyone,
I have a question. Is there anywhere a clear definitaion what a hydrostatic pressure test is? I mean the pressure test of a single pipe (by the manufacturer) not a complete system.
Is the test a leak test, where you pressurize to the test pressure, stop pumping and see if the pipe is tight and the pressure does not decrease?
Or is it a kind of stress test, by means you pressurize the pipe to the test pressure and hold it there? Decreasing pressure (due to small leackages in the system) can be balanced by pumping during holding time. And the acceptance criteria is that the pipe does not deform, leaks or bursts.
I have a question. Is there anywhere a clear definitaion what a hydrostatic pressure test is? I mean the pressure test of a single pipe (by the manufacturer) not a complete system.
Is the test a leak test, where you pressurize to the test pressure, stop pumping and see if the pipe is tight and the pressure does not decrease?
Or is it a kind of stress test, by means you pressurize the pipe to the test pressure and hold it there? Decreasing pressure (due to small leackages in the system) can be balanced by pumping during holding time. And the acceptance criteria is that the pipe does not deform, leaks or bursts.





RE: Hydrostatic pressure Test for pipes
In general, however, if you are pumping, you are not holding, so pumping during holding time is not permitted.
rp
RE: Hydrostatic pressure Test for pipes
A leak test is similar to a hydrotest except the pressure is defined by either a standard or specification and is based on a pressure to detect only leaks. The leak test is commonly used to check for leaks at flanged joints and connections, and is not necessary to proof test an item.
RE: Hydrostatic pressure Test for pipes
RE: Hydrostatic pressure Test for pipes
Yes I was checking the ASTM A 999 but its still not very clear. If it would be a "kind of leak test" where you survey the pressure lost you could pressurize the pipe alwayys with the same pressure (for example 10 bar). But you need to calculate the test pressure to produce a defined stress so it looks to me like a "stress test". If it is a kind of stress test the main thing is that the pipe can withstand the pressure and it should be no problem if you pump during holding time or a small loss of pressure as long as the minimum pressure and therefore the stress is applied.
Is it correct?
RE: Hydrostatic pressure Test for pipes