Pipe crimping apparatus

A pipe crimping apparatus comprising holding means to externally engage and hold a joint to be crimped, the holding means having a concavity defining a part cylindrical clamping zone, at least one pair of crimping arms pivotally mounted on the holding means, each arm being movable relative to the clamping zone and means to cause movement of the arms relative to the clamping zone wherein the arms, in a crimping movement, extend radially into the clamping zone to engage a joint, and impress by indentation portions of an outer socket end onto an inner spigot end to secure same together wherein the holding means is an elongate block with the concavity in one peripheral side with both ends of the block being rebated to provide two cheeks between which a respective crimping arm is pivoted, the crimping arms being similarly cranked and mounted in mirror-image on the block with each said arm pivoted at its crank to the respective cheeks of the block and a distal end of an outer part of each said arm has a protuberance directed inwardly towards the clamping zone.