Downloaded from https://www.everyspec.com MIL-STD-1311D METHOD 1141 PRESSURE (Implosion) 1. Purpose. A safety precaution to guard against the implosion of a glass tube with a large volume, primarily cathode-ray tubes. 2. Procedure. The tube shall be subjected to 45 pounds per square inch (3.1 kilograms per square centimeter) absolute pressure for a period of at least 60 seconds. This pressure shall be attained within 60 seconds. 3. Acceptance criteria. Upon completion of the test, there shall be no physical damage to the tube. METHOD 1141 1141-1 19 April 1968