Flange classification method:
1, according to the chemical(HG) industry standards: integral flange(IF), thread flange(Th), plate flat welding flange(PL), neck to Hanfalan(WN), neck flat Hanfalan(SO), insert welding flange(SW) , PJ/SE, PJ/RJ, Falangai(BL(S)), Falangai(BL).
2, according to petrochemical(SH) industry standards: thread flange(PT), Hanfalan(WN), flat welding flange(SO), insert welding flange(SW), loose sleeve flange(LJ), Falangai(not table note).
3, according to the mechanical(JB) industry standards: overall flange, Hanfalan, plate flat welding flange, welding ring plate type loose flange, flat welding ring plate type loose flange, flanging plate type loose flange, turning edge plate type loose flange, Falangai.
4, according to national(GB) standard points: overall flange, thread flange, Hanfalan, with neck flat Hanfalan, with neck insert welding flange, welding ring with neck sleeve flange, plate flat welding flange, welding ring plate loosing flange, flat welding ring plate loosing flange , flanging ring plate type loose sleeve flange, Falangai.