Classification and Material of Flanges
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 set flange (PJ/RJ), lining flange cover (BL (S)), flange cover (BL).
2: According to the petrochemical (SH) industry standards: threaded flange (PT), butt-welding flange (WN), flat welding flange (SO), socket weld flange (SW), loose set flange (LJ), flange cover (not table note).
3：According to machinery (JB) industry standards: integral flange, butt welding flange, plate type flat welding flange, butt welding ring plate type loose set flange, flat welding ring plate type loose set flange, flap ring plate type loose set flange, flange cover.
4: According to the national (GB) standard: overall flange, threaded flange, butt welding flange, necked flat welding flange, necked socket welding flange, butt welding ring necked loose flange, plate type flat welding flange, butt welding ring plate type loose flange, flat welding ring plate type loose flange, flange cover.
WCB(Carbon Steel), LCB(Low Temperature Carbon Steel), LC3(3.5% Nickel Steel), WC5(1.25% Chromium 0.5% Molybdenum Steel), WC9(2.25% Chromium), C5(5% Chromium 0.5% Molybdenum), C12(9% Chromium 1% Molybdenum), CA6NM(4(12% Chromium Steel), CA15(4)(12% Chromium), CF8M(316 Stainless Steel), CF8C(347 Stainless Steel), CF8(304 Stainless Steel), CF3(304L Stainless Steel), CF3M(316L Stainless Steel), CN7M(Alloy Steel), M35-1(Monel), N7M(Hastelloy B), CW6M(Hastelloy C), CY40(Inconel), and so on.
