We has passed DNV, TUV, BV, KR, ISO VDTUV certification. Our flanges are manufactured according to ANSI, EN1092-1, JIS, DIN, SABS, GOST, ASA2129 standard etc. We also have VMC/CNC machine, could produce the special flange according to drawing. ZHANGQIU AIGUO FORGING CO., LTD established in 1992, specializes in manufacturing forged flanges with annual export of over 15,000 tons, serving oil, gas and power companies all over the world. Read More