Each tube, with internal surface clean and dry, shall be internally pressurized to
150 psi (1034 kPa) minimum with clean and dry compressed air while being submerged in clear water. The tube shall be well lighted, preferably by underwater illumination. Any evidence of air leakage of the pneumatic couplings shall be corrected prior to testing. Inspection shall be made of the entire external surface of tube after holding the pressure for not less than 5 seconds after the surface of the water has become calm. If the tube shows leakage during the air underwater test, it must be rejected. Any leaking areas may be cut out and the tube retested.
* This test is for demonstration on web page only! Please be informed that all testis are under ASTM Standard. For more information, please contact us.
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