Flange standards and fitting standards for PVC-U material
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I’m seeking help from experts. I am working on piping systems using PVC-U material, and the standard for this material is GB/T4219.1-2008. However, I cannot find any standards related to flanges. I need information on the standards for flanges made of PVC-U, as well as the standards for fittings made of this material.
GB/T 4220 standard requirements: “GB/T 4219-2008 – Powered by Discuz! http://bbs.hcbbs.com/thread-936284-1-1.html
The American standards cited in domestic standards have been revoked; it is not recommended to continue using those domestic standards. There is no such thing as UPVC in American standards – classification is based on composition instead. If one insists on using the term UPVC, then it is better to use European standards, as specified in BS EN ISO 1452