FORGED STEEL FLANGES, YELLOW PAINT, ISO QUALIFIED, HTHIRED PARTY INSPECTED, HIGH QUALITY, PROMOTE DELIVERY For forged steel flanges, we supply per all ... , stainless steel and high alloy steel. The size range is from 1/2 to 144 in inch system and from DN10 to DN4000 in metric ... pressure equipment or pipeline engineering per ASME and API codes. HIGH QUALITY FLANGE