Stainless steel flat welding flange welded flange

1, according to the chemical (HG) industry standard points: integral flange (IF), threaded flange (Th), plate flat welding flange (PL), with neck butt flange (WN), with neck flat welding flange (SO), socket welding flange (SW), welded ring loose flange (PJ / SE), flat welding ring loose flange (PJ / RJ), lining flange cover (BL (S)), flange cover (BL). 2, according to Sinopec (SH) industry standard points: threaded flange (PT), welded flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ) , flange cover (not table note). 3. Press Machinery (JB) industry standard points: the overall flange, welded flange, welded flange plate, welded ring loose flange plate, flat plate welding ring loose flange, Loose plate flange flange, flange cover. 4, according to the national (GB) standard points: the overall flange, threaded flange, welded flange, with neck flat welding flange, with neck socket welding flange, welded neck collar with loose flange, plate flat welded flange, welded flange ring set loose plate, flat plate welding ring loose flange, plate flange ring loose flange, flange cover.