Virtually all the shortcomings of butt welding can be eliminated by welding couplings with embedded heaters (Sleeved welding). Such welding allows the connection of pipes with different wall thicknesses (including less than 4 mm) and Mark polyethylene. Welding of sockets can be carried out in cramped conditions; repair plastic pipe is almost always require the use of this type of connection.
Electrofusion welding is a method of joining pipes by plastic sleeve, inside which is a metal spiral. Clutches wear on the prepared ends of the pipe and current is fed a certain value. The heating coil provides fusion and mutual penetration of the material of pipes and joints, forming a reliable connection.
A critical feature of electrofusion welding is the availability of a rich arsenal of various solutions on the device nodes and interchanges. Saddle taps, electric outlets, and pressure-reducing couplings, transitions to a metallic threads can significantly reduce labor costs, and sometimes even indispensable in solving technical problems.
More information electrofusion welding technology can be found in the website section “PEX pipe“. Ibid read about its advanced features, using different kinds of products with embedded heaters.