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About the flange?

2011-06-12View Original

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In a data sheet, the flange specification is PN1.6 RF, but the notes state that it comes with a flange (with butt welding). Is there any contradiction in this? As I understand it, forceful butt welding corresponds to WN; I hope the experts can provide an explanation. Thank you very much
Reply #22011-06-13
RF refers to the protruding surface on the flange end face; it is a welding method in which a neck is used for welding the flange to the pipe, and there is no contradiction in this.
Reply #32011-06-13
RF is the connection surface of the flanges (the connection between flanges), while WN refers to the type of connection at the point where the flange is welded to the pipeline

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