What are the classifications of flanges?

1. According to chemical industry standards: integral flange (IF), threaded flange (Th), plate type flat welding flange (PL), diameter butt welding flange (WN), neck 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 industry standards: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose sleeve flange (LJ), flange Cover (not shown).

3. According to mechanical industry standards: integral flange, butt welding flange, plate type flat welding flange, butt welding ring plate loose sleeve flange, flat welding ring plate loose sleeve flange, flange ring plate loose sleeve flange, Flange cover.

4. According to national standards: integral flanges, threaded flanges, butt welding flanges, flat welding flanges with necks, socket welding flanges with necks, loose flanges with necks, butt flanges Butt welding ring plate loose sleeve flange, flat welding ring plate loose sleeve flange, flange ring plate loose sleeve flange, flange cover.