Marking of elbows

2019-04-17View Original

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I recently encountered a elbow, and I’m wondering what material it’s made of. There’s a series of markings on it, but I don’t know what they mean. Could anyone from Haichuan help me understand them?

Reply #22019-04-17

This is not an elbow but a flange: a large-diameter flange according to American standards, HG/T20623 Series B, with a pressure rating of 300 pounds. The flange’s sealing surface is of the RF type; the wall thickness at the pipe connection end is 11.7. The material used is A182 F347H, an austenitic stainless steel suitable for high-temperature applications.

Reply #32019-04-19

There are standards printed on it, HG/T20623

Reply #42019-04-22

WN necked butt weld flange, F347H high-temperature stainless steel

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Marking of elbows

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