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    Failure of Stainless Steel Check Valve in Oxygen Service

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    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.


    oxygen, flammability, fire, TFE, Viton®, stainless steel, silicone

    Author Information:

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

    Committee/Subcommittee: G04.01

    DOI: 10.1520/STP12044S