... form hyperbol Structure and features This oil pipe tightener machine adopts hyperboloid roller-climbing clamping mode.Two ... , steady tighten, no slipping, no damage for pipe and clamping scar according to API standard. The ... of driving clamp, backup clamp, machine body, torque testing device, hydraulic power supply, electric control system and ... Center high mm 1000 Total power kw 30 Weight kg 7000