|Co-working Developing Co., Ltd., located in Tianjin of China is a professional manufacturer of steel pipes and pipe fittings. Our company was established in 1980. We have nearly 20 years' experience in production. Our main products are pipe fittings, pipes, flanges, valves and so on. We can manufacture according to ANSI/ASTM, JIS, DIN, API, GOST and non-standard. The sizes are 1/2" up to 72" for pipe fittings, 1/2" up to 160" for flanges, 1/2" up to 24" for pipes, 1/2"up to 12" for valves|
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