Weifang Changsheng Group is a professional manufacture of Steel Pipes, Grooved Couplings and Fittings, Malleable Iron Threaded Fittings whose annual production capacity is more than 500,000 tons of pipes, 50,000 tons of Grooved Couplings and Fittings and 30,000 tons of Malleable Iron Threaded Fittings. The company was founded 20 years ago, and has already exported our products to more than 80 countries and areas in the world. The company now owns five factories, two for pipes, two for grooved couplings and fittings, one for malleable fittings, and totally covers an area of 500,000 square meters. Our company has gradually got FM, UL, CE and CCC approvals, which can guarantee the good quality of our products.