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I have a question about elbows

2009-02-27View Original

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90°ELBOWDN=200ST45.8/III20G; the standard specified by the design institute is E17.15C21SO – but what exactly is this standard?
Reply #22009-02-27
Our unit has recently purchased two lightweight ventilation butterfly valves (DF41W-0.1C PN0.1 DN1800) for use in a flue gas recovery and drying project, but we found that there is a large gap between the valve disc and the housing of these valves – approximately 5 MM. Is such a butterfly valve considered a qualified product, and can it be used in flue gas recovery and drying projects? I’d like to ask everyone for advice; thank you in advance
Reply #32009-02-27
Is it the logo of the design institute? You can ask the people at the design institute
Reply #42009-02-27
It should be the ASME standards for pressure pipelines and fittings, series B31 and B16. Domestic standards do not use such labeling.

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Translated at 2026-07-28 04:41:56

Original: https://bbs.hcbbs.com/thread-401115-1-1.html

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