1. According to the standard of chemical industry: Integral Flange (IF) , threaded Flange (Th) , plate flat welding Flange (PL) , neck 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) , lining flange cover (BL (s) , flange cover (BL) .
2, according to petrochemical (SH) industry standard points: threaded Flange (PT) , welding Flange (WN) , flat welding Flange (SO) , socket welding Flange (SW) , loose sleeve flange (LJ) , flange cover (not table note) .
3, according to machinery (JB) industry standard points: Integral Flange, welding Flange, plate flat welding Flange, welding ring plate loose set Flange, flat welding ring plate loose set Flange, flanging ring plate loose set flange, flange cover.
