What Are The Categories Of Flanges

There are many types of flanges, mainly according to their nominal diameter (type A B, that is, Gong-inch system), nominal pressure, use structure form, material, sealing surface form, connection mode classification (diameter and pressure grade are not included) according to the flange form: Plate flat welding flange (PL), neck flat welding flange (SO), neck butt welding flange (WN), integral flange (IF), socket welding flange (SW), threaded flange (Th), butt welding ring loose flange (PJ/PE), ring loose flange (PJ/JR); According to the sealing surface form: convex surface (RF), concave and convex surface (MFM), tenon and groove surface (TG), full plane (FF), ring connection surface (RJ); Flange covers are not included here; According to the material divided into: cast iron flange, cast steel, forging, Q235, stainless steel flange, plastic flange, etc.

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