Nantong Yongda Pipe-making Co., Ltd is a professional large enterprise which is specializing in high-grade steel oil pipes, piping fittings, seamless steel pipes and welded pipes. We are located in Hai'an Industry Park, Nantong City, Jiangsu Province, which is about 1.5H from Shanghai. Registered with 298 million RMB capital, our annual output is about 100,000 tons. With high orientation and brand strategy, we attracted excellent experts with high experience, in order to make the best oil pipes. Adopting international standard management system, we collect our own technology for improving our products value, by digesting, absorbing and re-innovating. Oil seamless steel pipe, ERW welded pipe, integral heavy drill pipe, upset tubing, casing pipe, line pipe, flow and structure of the pipe are all our main products which steel grade is above N80Q. Our products meet the requirement of oil exploration and oil gas transportation. "The overall heavy drill pipe" "all-in-one heavy drill pipe" technology is our own intellectual property, with high strength, low cost, drilling depth and high re-use rate. At present, we've applied for national invention patent. Sincerely welcome customers' visit all over the world.