1. Raws li tus qauv kev lag luam chemical (HG), nws muab faib ua: integral flange (IF), threaded flange (Th), phaj tiaj weld flange (PL), taub qab weld flange nrog caj dab (WN), tiaj weld flange nrog caj dab (SO), qhov (socket) weld flange (SW), taub qab vuam flange xoob flange (PJ / SE), lub nplhaib vuam flange (PJ / RJ), lub hauv paus flange npog (BL (S)), flange npog (BL).
2. Raws li petrochemical (SH) cov qauv kev lag luam: threaded flange (PT), taub qab vuam flange (WN), tiaj vuam flange (SO), qhov (socket) vuam flange (SW), xoob flange (LJ), flange npog (tsis ceeb toom) .
3. Raws li tus neeg kho tshuab (JB) kev lag luam tus qauv: ib qho flange, taub qab vuam flange, phaj tiaj welded flange, taub qab welded nplhaib phaj xoob flange, tiaj welded nplhaib phaj xoob flange, flanging nplhaib phaj xoob flange, flange npog.
4. Raws li lub teb chaws (GB) tus qauv: ib qho flange, threaded flange, taub qab vuam flange, tiaj weld flange nrog caj dab, lub qhov (socket) weld flange nrog caj dab, pob tw weld nplhaib nrog caj dab xoob flange, phaj tiaj welded flange, taub qab welded nplhaib phaj xoob flange, tiaj welded nplhaib phaj xoob flange, flanging nplhaib phaj xoob flange, flange npog.