scope:

This publication provides guidelines for the AE testing of certain specification tubes as defined by specification in Appendix A. See Appendix A for the listing of tube specifications and water volumes.

This publication includes two methods of AE testing and, for purposes of differentiation, the methods are addressed as method A and method B. Method A, which is approved in the United States by DOT and in Canada by TC, consists of an AE test performed during pneumatic pressurization to at least 110% of the normal fill pressure or marked service pressure, whichever is greater. This test is a 5-year test that replaces the water jacket hydrostatic test. Method B, which is approved in Canada, consists of an AE test performed during the hydrostatic proof pressurization to the retest pressure of the tube. This test is a 10-year test that replaces the 5-year hydrostatic test in the water jacket.

NOTE-Both methods A and B require additional ultrasonic verification depending on the operational criteria defined in this publication and in Appendix A.