Flange classification method

1. According to the chemical industry (HG) industry standard: integral flange (IF), threaded flange (Th), plate flat welding flange (PL), neck butt weld flange (WN), neck flat welding flange (SO), socket weld flange (SW), butt weld ring loose flange (PJ/SE), flat weld ring loose flange (PJ/RJ), lining flange cover (BL(S)), Flange cover (BL) [2].

2, according to petrochemical (SH) industry standards: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ) , flange cover (not shown).

3. According to the mechanical (JB) industry standard: 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 sleeve Flange, flange cover.

4. According to the national (GB) standard: integral flange, threaded flange, butt weld flange, neck flat weld flange, neck socket weld flange, butt weld ring with neck loose flange, plate flat Welded flange, butt weld ring plate loose flange, flat welded ring plate loose flange, flanged ring plate loose flange, flange cover.