Cangzhou Yuanfang Steel Pipe Co., Ltd. is a production and export trade as one integrated company, we specialize in the production and study of welded steel pipe and seamless pipe, Square steel pipe, rectangular steel pipe, straight seam welded steel spiral welded pipe, we can supply the following specifications, standards, material steel:Square steel tube: 30 * 30-800 * 800mm ,wall thickness :3.0-30mm, rectangular steel tube: 50 * 30-800 * 300 ,wall thickness :3.0-30mm,ERW Pipe: Φ48-1420mm ,wall thickness :2.5-60mm