Tightness testing method, specimen and test bench

摘要

The method involves fixing a test specimen (21) to a test bench (22). The test specimen is enabled to be separated from the test bench in a non-destructive way by a sealing gasket. The test specimen is removed from the test bench after a test of behavior under pressure. The test specimen is subjected to a thermal shock remotely from the test bench. The test specimen is refixed to the test bench to conduct another test of behavior under pressure. A portion of a surface of a reinforcing layer is covered by the sealing gasket. An independent claim is also included for a test specimen comprising a sealing film.