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  1. Marcsierra

    LWN inside standard diameter in NPS higher than 12 INCH

    In LWN (Long Weldig Neck) NPS higher than 12" most of the datasheets propose the inside diameter as the outside diameter of the Pipes acc. ASME 36.1 Which is the reason? Is it to be used as Slip ON Flanges?? If so, why is not allow or recommended directly a SO Flange? I will appreciate your...

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