welded pipe and seamless pipe

　　Hebei Shengtian Group Reaguan Pipeline Co., Ltd, which mainly produce and export seamless steel pipes, spiral  steel pipes, welded steel pipes and oil pipes . - See more at: http://www.strpipeline.com/#sthash.dCObLjSl.dpuf

　　Welded Pipe

　　The welded wrought steel pipe manufacturing involves moving steel strips through rollers that form the material into a tubular shape. These strips then pass through a welding device that fuses them into a single pipe.

　　Seamless Pipe

　　Seamless wrought steel pipe starts as a solid piece of heated steel. Forced through a form that shapes the material into a hollow tube, the pipe is then machined into appropriate dimensions.