Electrofusion welding machine for PE / HDPE pipes, used for welding electrical joints for water, gas, and infrastructure networks.  Usually, its working method: • The Electrofusion joint is installed on the pipe. • Connect the machine wires to the joint. • The machine passes an electric current through the heating wire inside the joint. • The poly melts and fuses tightly.  This type often supports: • PE / HDPE pipes • Approximate sizes from 20 mm to 315 mm depending on the model.