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ASTM G 175 is a standard test method for evaluating the ignition sensitivity and fault tolerance of oxygen regulators used for medical and emergency applications. To show the ASTM G 175 test method was repeatable at different laboratories, a series of interlaboratory tests were performed on medical oxygen regulators in late 2002. These tests were performed on six regulator designs at three laboratories. Three of the regulator models employed a compressed gas association (CGA) 870-style connection and the other three regulator models used a CGA 540-style connection. Five of the regulators were commercially available and the other one was a CGA 870-style regulator that was intentionally designed to fail the test. The results of the round robin tests are presented and discussed.
G 175, medical regulator, ignition pill, fault tolerance
Mechanical Engineer, Honeywell Technology Solutions, Inc., NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM
Mechanical Engineer, NASA Laboratories Office, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM