Hydrostatic Proof Test
Fill the test specimens with fluid which meets the requirements before installation onto the appropriate testing apparatus.
Place the test specimens in a burst chamber and secure into place in accordance with the manufacturer's recommended procedures. One end of the test specimen shall be free to move.
Equip the chamber with calibrated pressure gages to permit visual readings of actual pressure being applied.
Perform the hydrostatic proof test at ambient temperature. Initially pressurize the test specimens to 0.690 MPa (100 psi) 65 % for a total period of 5 min. There shall be no evidence of leakage during this 5-min period. If leakage occurs, discontinue the test. The affected specimens have failed the test. Fill out the test report noting the reason for discontinuing the test.
If there is no evidence of leakage after the initial 5-min period, gradually increase the pressure at an average rate not to exceed 172 MPa/min (25 000 psig/min) to 150±5 % of the rated pressure of the pipe or tube or MAF, whichever is lower. Maintain this pressure for an additional period of 5 min. There shall be no evidence of leakage during this 5-min period. If leakage occurs, discontinue the test. The affected specimens have failed the test. Fill out the test report noting the reason for discontinuing the test.
If there is no evidence of leakage within the MAF or MAF joint during both pressurized periods, the test specimens have passed the hydrostatic proof test. The specimens are ready for further testing.
