Shang Dong Qing Yun Yun Long Precision Casting ... is a company specializing in producing precision casting products. Our main products are stainless steel precision casting products, including all kinds of pipe fittings, valves, couplings, unions, flanges as well as carbon steel products, alloy products and others. They are widely used in fields of machinery manufacture, chemical industry, textile, food and papermaking. They have passed the evaluation of ISO9001:2000 International Quality Management System certification. Please feel free to contact us for further information.