Pneumatic Internal Pipe Clamp for Short Pipe WeldingThis series Pneumatic Internal Pipe Clamp for Short Pipe Welding are used for short pipe alignment work before welding when the pipe length≥200mm only.Technical points and advantages of DP clamp:· Hydraulic mode is much better for out of round correction.· Double expanding mechanism on one side with self-centered function,Website:http://www.pipelineautoweld.com, guarantee the concentricity of equipment and the pipe.· Built-in hydraulic circuits are space saving, more reliable and safe.