an internal pneumatic test of not less than 250 psi (1.7 MPa) for 5 sec without evidence of leakage. The test method shall permit easy visual detection of any leakage such as immersion of the tube under water or a pressure differential method
an internal pneumatic test of not less than 250psi (1.7 MPa) for 5 sec without evidence of leakage. Thetest method shall permit easy visual detection of any leakagesuch as immersion of the tube under water or a pressuredifferential method