Flange knowledge inventory

Flange knowledge inventory

The flange is a flanged part. The flange can be separate, called a flange plate, or combined, such as flanges on both ends of the valve, which facilitates the installation of bolts. This article introduces flange materials, sealing surface forms, and flange types according to national standards and chemical, petrochemical, and mechanical standards.

Material

No. 20, A105, Q235A, 12Cr1MoV, 16MnR, 15CrMo, 18-8, 321, 304, 304L, 316, 316L.

Sealing surface form

Flat surface (FF), raised surface (RF), convex surface (M), concave surface (F), concave and convex surface (MF), tenon surface (T), groove surface (G), tongue and groove surface (TG), ring connection surface ( RJ).

Divided according to national standards

Integral flange, threaded flange, butt welding flange, neck flat welding flange, neck socket welding flange, butt welding ring neck loose sleeve flange, plate flat welding flange, butt welding ring plate loose sleeve Flange, flat welded ring plate loose sleeve flange, flanged ring plate loose sleeve flange, flange cover.

According to chemical industry standards, it is divided into：

Integral flange (IF), threaded flange (Th), plate flat welding flange (PL), diameter butt welding flange (WN), neck flat welding flange (SO), socket welding flange (SW ), butt welding ring loose sleeve flange (PJ/SE), flat welding ring loose sleeve flange (PJ/RJ), lined flange cover (BL (S)), flange cover (BL).

According to petrochemical industry standards, it is divided into：

Threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ), flange cover (not noted).

According to machinery industry standards, it is divided into：

Integral flange, butt welding flange, plate flat welding flange, butt welding ring plate loose flange, flat welding ring plate loose flange, flanged ring plate loose flange, flange cover.

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