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  1. Inspector67

    Required Examination of PTFE Lined Steel Pipe with Tell-tale Holes

    ASME B31.3 like other codes sometimes cannot be straight forward. We are fabricating (welding) steel pipe with a PTFE liner. The steel pipe will have a tell-take hole to indicate if there is a breach in the PTFE liner. I believe this is still consider Normal Fluid service requiring 5%...

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