Pipe end preparation tool having improved torque reacting and clamping capabilities

摘要

A clamping device for clamping a mandrel (28) to an elbow or pipe (18) has a plurality of clamping pins (62), each pin having a generally cylindrical shape with a hemispherical end portion (62a) defining a plurality of concentric ridges (64). An axially moveable actuating member (72) bears on a second end (70) of the centering pins such that movement of the member along the longitudinal axis (30) of the mandrel urges each of the centering pins into contact with the pipe surface.