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SO RF

2009-04-07View Original

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What do SO RF mean for flange sealing surfaces? Please advise
Reply #22009-04-07
SO: SLIP ON RF: RAISED FACE
Reply #32009-04-07
SO: slip-on flange flat-welded flange with neck RE: raised face raised surface flange
Reply #42009-04-07
SO flange type: Welded flat flange with neck RF flange sealing surface: Raised face Reference: HG20592
Reply #52015-05-15
The flange type denoted by SO is a \"flat weld flange with neck\"; HG/T20592-97 has been repealed, and the current standard should be HG20592-2009

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Translated at 2026-07-28 00:49:50

Original: https://bbs.hcbbs.com/thread-436800-1-1.html

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