SEDL / STP / STP1319-EB / STP12044S

Failure of Stainless Steel Check Valve in Oxygen Service

Rago, JJ
Materials Engineer, Air Products & Chemicals Inc., Allentown, PA

Pages: 5    Published: Jan 1997

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Abstract

Past fires in check valves in oxygen service have yielded clear internal damage. In a recent failure, most of the valve internals, including polymers, were undamaged and evidence of fire was confined to an O-ring and groove that was downstream of threads. An apparent key causal factor was evidence of silicone grease present.