consult: Problems with flanges and fasteners used in 32% caustic soda pipelines

2022-04-03View Original

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I would like to ask all friends, how to choose flanges and fasteners for 32% caustic soda pipeline? Pressure 0.32MPa.

Reply #22022-04-04

Do fasteners refer to bolts? Gasket? As long as it’s a material that doesn’t chemically react with it, right? How about carbon steel, stainless steel,,,, PTFE gaskets, rubber asbestos gaskets? Give it a try.

Reply #32022-04-06

There is a corrosion-resistant alloy material selection table, you can refer to it below

Reply #42022-05-30

Normal process pipes are 8163 or 9948. As long as the heating temperature is not too high and alkali embrittlement does not occur, it will be fine.

Reply #52022-06-14

What I mean is that for caustic soda pipelines, do we have to use fully threaded studs according to the regulations of HG20592-2009, p190? Wouldn't hex head bolts work?

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consult: Problems with flanges and fasteners used in 32% caustic soda pipelines

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