Profile: Co-Working Developing Co., Ltd. offers steel products such as pipes, pipe fittings, flanges and valves. We supply equipment for oil field industries and machinery for welding & cutting. We offer pipe fittings such as stainless, alloy & carbon steel fittings, malleable PVC and sanitary fittings. We provide ball, butterfly and gate valves. Our pipes are available in seamless, seam and drill types. Our products are widely used in petrochemical industry, mining machinery, pipe lines, engineering machinery, water treatment, textile machinery, metallurgy, heavy machinery, ship building, tire mold, transport vehicles and wind electric power generation.