Electrofusion - What is it?


An alternative form of welding PE is the electrofusion system where heating elements are embedded in PE fitting sockets. These sockets form part of a coupling or other fitting and require an electrical input from a welding machine to produce a welded joint. The wide range selection of high quality joining systems (electrofusion and spigot fittings), machines, tools and accessories is representative of an informed and solution approach to our customers needs in the water and gas utility market.

Electrofusion procedure utilises the weldability of materials with out the use of the relatively cumbersome butt fusion welding machine. This is achieved by using polyethylene couplings with embedded copper wire coils serving as heating elements. A portable welding machine connected to a power source provides a current source of the correct voltage and duration, which is applied to the terminals on the coupling or socket. This causes the mating surfaces of socket and pipe to be melted to give a fused contiguous whole.
The electrofusion process unlike butt fusion can be used to joint pipes and fittings of differing SDR or wall thickness. Welding equipment can be supplied with a built in data-recording system to give full traceability of individual welds.


Electrofusion permits a safe, systematic, economic and efficient fully welded installation for both buried and aboveground PE piping systems. Electrofusion products should be individually sealed in PE bags and packaged in cartons to protect them from UV radiation, oxidation as well as general contamination. Additionally they are supplied with a Barcoded card that contains all relevant product information, traceability and fusion welding parameters required for joining.


Strata Precision Plastics supports the efforts to ensure all those installing and welding Polyethylene fittings have a current Polyethylene welding certificate. There are many contractors involved in installing Polyethylene pipe lines in New Zealand who are not suitably trained & certified in this practise and this places the asset at risk of failure.

For information on training and certification for Polyethylene welding, please visit the link below.


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