1: According to the chemical industry (HG) industry standards: integral flange (IF), threaded flange (Th), plate welding flange (PL), necked butt-welding flange (WN), necked plain welding flange (SO), socket welding flange (SW), butt-welding ring loose set flange (PJ/SE), plain welding ring loose

Flange , also called flange flange disk or flange. Flange is a pipe and pipe interconnecting parts, for the connection between the pipe end; also used in the equipment import and export flange, for the connection between the two devices, such as reducer flange. Flange connection or flange joint,