FORGED STEEL FLANGES, YELLOW PAINT, ISO QUALIFIED, HTHIRED PARTY INSPECTED, HIGH QUALITY, PROMOTE DELIVERY For forged steel flanges, we supply per all ... to PN40MPa in metric system. The materials of the flange contain carbon steel, alloy steel, stainless steel and high alloy steel. The size ... pressure equipment or pipeline engineering per ASME and API codes. HIGH QUALITY FLANGE