Smart Joint is the manufacturer of HDPE pipe, HDPE fittings and fusion machinery since 1992. With around 30 years' experience in this industry, with innovation and strong team in R&D, smart joint aims to provide a full solution for the PE pipe joints. Smart Joint Piping Systems produces a full range of high-performance electrofusion machines that guarantee complete documentation of the electrofusion process. Compact and portable, these machines are made from robust materials, enabling them to be used in even the harshest conditions. They offer excellent data storage options and are configurable with little advance training required. Welding range for all Smart Joint Electrofusion Machine are for Smart Joint EF fittings. All machines are suitable for other brand of EF fittings. When you use Smart Joint EF machine to weld other brand EF fittings, pls check the fusion voltage and select the right model for the fusion. Size:DH-2 PH-3 PH-4 PH-5