... large clamping range, high strength, steady tighten, no slipping.damage for pipe and clamping scar Structure and features Model BHJX-570 ... clamping range, high strength, steady tighten, no slipping, no damage for pipe and clamping scar according to API standard. The backup ... teeth and jaw plate of the driving and backup clamps for different pipe diameters. It adopts siemens PLC+industry computer to ...