PRISMA 125 workshop/construction site welding machine is highly suitable for socket fusion of pipes and fittings with up to an OD of 125 mm (¾ to 4) as per standards in force. The device is constructed of a machine body that features a selector for welding depths of various diameters, four self-centering steel clamps for locking pipes and fittings (different brands), a self-centering socket welder with electronic temperature control, a device for the maximum heating depth, a sliding trolley, a tripod to support the pipe, a set of sockets and spigots for socket fusion from Ø 25 to Ø 125 mm with steel case. Based on the type of sockets & spigots supplied, the welding machine is delivered in two versions RISMA 125 type A and PRISMA 125 type B. The machine body is complete with an electronic socket welder.