Oil and gas transmission longitudinal submerged arc welding pipeproduction line is composed by pipe rolling machine, back bendingmachine, joint preliminary welder. After the plate be shaped, itwill be sent to go through welding, anti-rust process, inspectionprocess to become finished pipes.
Reverse deformation device and upper pressing beam device are builtto eliminate the deflection deformation of the upper roller. Thismachine is driven by hydraulic motor, products are unloadedautomatically without the overturn of the side frame and assistantof the auxiliary.