A pipe joint, and a method of forming a pipe joint between two metallic pipes which have been internally and/or externally coated with a material to prevent corrosion includes a spigot and a socket. The socket has, or is formed with, an internal circumferential groove (6) that provides a seating for an elastomeric sealing ring (8). An extension or lip (13) forward from the groove provides a welding location (14) remote from the sealing ring. The coating on the end of the socket if necessary is removed to facilitate welding. The spigot has a heat sink member (9) to enable the lip of the socket to be welded to the metal of the spigot.