SYMPOSIA PAPER Published: 11 October 2021

Oxygen Compatibility and Safe-Use Criteria for Nonmetals


Oxygen fires frequently develop through a kindling-chain progression that initiates with the ignition of nonmetals used as seats, seals, or lubricants in oxygen components. Several industry standards have been developed to aid the evaluation of the oxygen compatibility of nonmetals, including ASTM G63, Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service, and ISO 21010. The test approaches and methods discussed in these standards vary, but their overall aim is to assess the oxygen compatibility of nonmetals to help establish “safe-use” criteria. This paper reviews approaches for assessing safe-use criteria and for evaluating the oxygen compatibility of nonmetals. The oxygen industry's conception of “maximum-use pressure” and “maximum-use temperature” is discussed because widespread misunderstanding exists. The methodologies for testing and evaluating the oxygen compatibility of nonmetals are summarized, and recommendations are provided for acceptance criteria on the use of nonmetals in oxygen service.

Author Information

Newton, Barry
WHA International, Inc., Las Cruces, NM, US
Chiffoleau, Gwenael, J.
WHA International, Inc., Las Cruces, NM, US
Forsyth, Elliot
WHA International, Inc., Tulsa, OK, US
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Pages: 13–32
DOI: 10.1520/STP162620200033
ISBN-EB: 978-0-8031-7699-7
ISBN-13: 978-0-8031-7698-0