Standards applicable to DN50×40 reducer

2020-06-15 View Original

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Which standard applies to the DN50×40 reducer: GB/T12459 (steel butt-welded pipe fittings) or GB/T14383 (steel socket-welded and threaded pipe fittings)?

Reply #2 2020-06-15

GB/T12459 \"Types and Parameters of Steel Butt-Welded Fittings\" and GB/T13401 \"Technical Specifications for Steel Butt-Welded Fittings\"

Reply #3 2020-06-15

This post was last edited by 2005180005 on 2020-7-2 09:22. Is it actually the case that the DN50 end is welded butt, while the DN40 end is welded by socket fusion? What is it like usually?

Reply #4 2020-06-18

This post was last edited by bfdlwolf on 2020-6-18 08:46. It refers to welded pipe fittings, which are connected to pipes.

Reply #5 2020-06-18

It depends on the way the connections are made: socket welding, butt welding, or threading, with three different standards corresponding to each method

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Standards applicable to DN50×40 reducer

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