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Hebei Allland Steel Pipe Manufacturing Co.,Ltd is one of the best socket weld flange, slip-on flanges, threaded elbow, stainless steel flanges, seamless steel pipes manufacturers and suppliers in China, welcome to wholesale socket weld flange made in China from our factory. The annual output capacity is 200,000 tons of steel pipes and 5,000 pieces of wind turbine tower. Allland has a staff of 214 workers, among whom more than 40 are technicians and engineers.