CO-WORKING DEVELOPING CO., LTD is specialized in producing pipe fitting, flange, valve and steel pipe with high, middle and low pressure. It is located in Tianjin, one of the four municipalities of China, which is the open coastal city of china and the biggest financial and trading center of north china. Tianjin port lies on the entrance of Haihe River, it is on the junction of city belt of Tianjin and Beijing and Bohai river economic group. Therefore, the transport is extremely swift and convenience. Our company is established in 1980, we are mainly engaged in making pipe line and it’s attachment in the field of petroleum, chemical, bout, electronic power and waste water dealing. We have 230 stuffs more, including 55 technical engineers whose 20 people have senior title. Therefore, we have a technical and experience team integrated with technics, design, and research. We calculate much experience in producing products, possessing our own feature after years of practicing and innovation. Our leading products is seamless steel, seam steel, elbow, tee, reducer, elbow ,flange, valve with diverse material, such as carbon steel, alloy, stainless steel and so on. Our products cover with many industries, including petroleum, chemical, bout, electronic power, meanwhile, we have good reputation from our customers.