Flange classification method

1. According to the chemical (HG) industry standards: integral flange (IF), threaded flange (Th), plate flat welding flange (PL), butt welding flange with neck (WN), flat welding flange with neck (SO), socket welding flange (SW), butt welding ring loose sleeve flange (PJ / SE), flat weld ring loose sleeve flange (PJ / RJ), lining flange cover (BL (S)), Flange cover (BL).

2. According to petrochemical (SH) 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 machinery (JB) industry standards: integral flange, butt welding flange, plate flat welding flange, butt welding ring plate loose sleeve flange, flat weld ring plate loose sleeve flange, flanging ring plate loose sleeve Flange, flange cover.

4. According to national (GB) standards: integral flange, threaded flange, butt welding flange, flat welding flange with neck, socket welding flange with neck, butt welding ring with neck loose sleeve flange, flat plate Welded flange, butt welded ring plate loose sleeve flange, flat welded ring plate loose sleeve flange, flanging ring plate loose sleeve flange, flange cover.