Consultation on JB class flange matching gaskets
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On the existing equipment at the site, many of the flanges are of the JB81 and JB4701 types, while the manholes are of the JB582/JB583 types. If anyone knows which standard gaskets would be suitable for use, I would appreciate some guidance – some of the gaskets I selected previously based on GB19066 did not fit properly. It would also be helpful if someone could provide me with the electronic versions of the standards for those two types of manholes; I haven’t been able to find the obsolete standards.
It can be customized according to the dimensions of the flange sealing surface; if it is an asbestos rubber sheet, it can also be determined by the user, as long as it fits within the sealing surface.