Abstract: A pipe crimping apparatus comprises a holding device to externally engage and hold a joint to be crimped. The holding device has a concavity in which a part cylindrical plate member is secured, the concavity and plate member defining a part cylindrical clamping zone. One pair of crimping arms is pivotally mounted on the holding device. Each arm is movable relative to the clamping zone. Handles are provided 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 the same together.