Electrofusion welding
This method is easy for jointing pipes and fittings of HDPE. Preinstalled resistance wires are embedded in the inside surface of the electrofusion coupling when the pipes or fittings are inserted in the coupling and the wires are connected to the welding unit, the contact surfaces become warm and consequently melt into each other until it forms a rigid and durable joint. A welding unit is available for this method which is easy and practical in narrow and tight installation. One of the advantages of this method is to weld pipes or fittings with different wall thicknesses and dissimilar PE grades, using the same welding conditions.
