(EN) Electromagnetic induction welding of plastic pipe distribution sys tems including inter alia induction weldable pipe connectors (100) each having at least one induction weldable pipe socket (102). The induction weldable pipe sockets (102) include a solid metal susceptor sleeve (104) enveloping a plastic solder lining (103). Electromagnet ic induction coil assemblies(200) for clamping on induction weldable pipe sockets (100).