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  1. Sealboot

    Section I and II-D - SA312 Pipe Permitted but not SA403 fittings?

    For an ASME Section I superheater coil, SA312 austenitic grades 304,347, etc are permitted to 1500F in ASME II-D, but the corresponding SA403 fittings are listed as not permitted in ASME IID. Does anyone know the reasoning behind this?

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