1. According to chemical industry standards: integral flange (IF), threaded flange (Th), plate flat welding flange (PL), welding neck flange (WN), slip-on 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. According to the petrochemical industry standards: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ), flange Cover (not indicated).

3. According to the standards of the machinery industry: integral flanges, butt welding flanges, plate flat welding flanges, butt welding ring plate loose flanges, flat welding ring plate loose flanges, flanged ring plate loose flanges, Flange cover.

4. According to national standards: integral flange, threaded flange, butt welding flange, flat welding flange with neck, socket welding flange with neck, butt welding ring loose flange with neck, plate flat welding flange , Butt weld ring plate loose flange, flat weld ring plate loose flange, flanged ring plate loose flange, flange cover.

Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate respectively, add flange pads between the two flange plates, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment have their own flanges, which are also flange connections. Flange connection is an important connection method for pipeline construction.

The flange connection is easy to use and can withstand greater pressure.

In industrial pipelines, flange connections are widely used. In the home, the pipe diameter is small, and it is low pressure, and the flange connection is invisible. If it is in a boiler room or production site, flanged pipes and equipment are everywhere.