Common classification of flange types

Update:26-09-2021
Summary:

There are many types of flanges, which are mainly class […]

There are many types of flanges, which are mainly classified according to their nominal diameter (Type A and Type B, that is, metric and inch), nominal pressure, purpose structure, material, sealing surface form, and connection method (diameter and pressure rating are not included). The forms are divided into: plate flat welding flange (PL), flat welding flange with neck (SO), butt welding flange with neck (WN), integral flange (IF), socket welding flange (SW), thread Flange (Th), butt welding ring loose flange (PJ/PE), ring loose flange (PJ/JR); according to the form of sealing surface: raised surface (RF), concave and convex surface (MFM), tongue and groove Surface (TG), full plane (FF), ring connection surface (RJ); flange cover is not included here; according to materials: cast iron flanges, cast steel, forging, Q235, stainless steel flanges, plastic flanges, etc.

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