Flange

 

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

 

2. According to petrochemical (SH) industry standards, it is divided into threaded flange (PT), butt welding flange (WN), slip on flange (SO), socket welding flange (SW), loose flange (LJ) and flange cover (not noted).

 

3. According to the mechanical (JB) industry standard, it is divided into: integral flange, butt welding flange, plate flat welding flange, plate loose flange with butt welding ring, plate loose flange with flat welding ring, flanging ring plate loose flange and flange cover.

 

4. According to national (GB) standards, it is divided into: integral flange, threaded flange, butt welding flange, neck slip on flange, neck socket welding flange, neck loose flange with butt welding ring, plate type slip on flange, butt welding ring plate type loose flange, flat welding ring plate type loose flange, flanging ring plate type loose flange and flange cover.