Question regarding valve flange standards
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I would like to ask everyone: can the valves specified in the Ministry of Machinery’s standard JB-2009 be used in conjunction with the flange standards HG 20592-2009 issued by the Ministry of Chemical Industry? Are there any differences in connection dimensions between valves from the Ministry of Machinery and those from the Ministry of Chemical Industry?
In practical use, there is basically no difference
I’ve never used the JB standard; can anyone provide a comparison of the specifications for two flanges?
The flange connection dimensions of the Mechanical Department should be the same as those of the Chemical Engineering Department, but the outer diameter of the flanges seems to need to be slightly smaller; it’s necessary to compare them carefully.
It’s just that there are slight differences in the outer diameter and thickness of the flange body; what’s most annoying is when laypeople see a valve with a mechanical industry flange connected to a flange from the chemical industry and claim that inferior products are being used……
There’s basically no difference; it depends on the specific occasion when using it, so one needs to take a closer look
This post was last edited by bugu on 2016-10-18 at 15:10. It’s a question I’m curious about as well: some of these standards are identical, while for those without standard dimensions, it’s possible to use them as references; otherwise one has to carry out the calculations by oneself
Generally, there is no significant difference, but it is necessary to consider the pressure rating; some pressure specifications are completely different
It is basically universal, as their installation dimensions are the same; the biggest differences might lie in the outer diameter of the flange and the diameter of the pressure ports. . . .