methods of joining or repairing coated tubes and associated apparatus

摘要

The present invention relates to a method of creating a weld between a coating of a coated pipe section and an electrofusion fitting. the socket comprises at least one heating element which is suitably disposed on or on a surface of the electrofusion socket and is electrically isolated from an internal surface of the socket. The method comprises locating one end of the electrofusion fitting within one end of the coated tube section, locating an induction coil within a hole of the electrofusion fitting in the vicinity of at least one heating element, and supplying electrical power to the coil. induction device to energize the at least one electromagnetic induction heating element.