... SO SW BL PL LJ etc Steel Flange ItemSteel FlangeMaterialCarbon Steel/Stainless Steel/Alloy Steel.StandardGB,JIS,BS,DIN. ... 2500#Wall thickness for welding neck flange: STD, SCH40, SCH80, SCH160. SCHXXSMaterial: carbon steel A105, stainless steel 304/304L, 316/316LCoating ... DIN2565,2566,2567,2567 loose flange DIN 2641,2642,2656,2673Material: carbon steel ST37.2, stainless steel 1.4301, 1.4404Coating ...