H-beam Hydraulic flange straightening Machine,welding machine hydraulic straightening machine Hydraulic type straightening machine is used for the ,angle distortion straightening of the H-beam with large thickness. Hydraulic cylinder presses from down side to up side, which has strong force and high driving torque and with good straightening efficiency and good quality. This machine is widely used for the fire electric furnace, heavy duty steel structure construction, steel bridge, water power industry.