Patent ID: 7959142

Claim:
A clamping device for clamping pipes, optionally plastic pipes for welding on butt welding machines, comprising a base part and a clamping lid that is removable from the base part or can be pivoted away from the base part, each having, to receive a pipe, a receptacle channel with circle segment-shaped cross section whose circle segment radius is matched to the pipe radius, and comprising means for also clamping pipes with a smaller radius, characterized in that at least one clamping insert that is fixable in the receptacle channel ( 13 ) of the base part ( 10 ) has an insert base part ( 23 ) and an insert clamping lid ( 25 ) that is removable or can be pivoted away from the insert base part, whose receptacle channels ( 30 , 31 ) have a circle segment-shaped cross section with a circle-segment radius smaller than that of the base part ( 10 ).