Flange type introduction
There are many types of flanges, which is a bit confusing. Today we will introduce the types of flanges so that everyone can know more about the types of flanges. Classified by material: 20# A105 Q235A 12CrMoV16MnR 15CrMo 18-8 321304 304L 316 316L etc. According to the sealing surface form: Flat surface (FF), raised surface (RF), convex surface (M), concave surface (F), Concave-convex surface (MF)...