Connect polypropylene pipe using brazing. Soldering technology for polypropylene pipes are not very complicated, The advantages of polypropylene pipes, Two tubes are interconnected by means of a coupling and coupling and threaded components. Tool for welding of polypropylene pipes that need solder connecting parts must be keeping horizontally. Soldering polypropylene pipes: types of tubes. Pipe of larger diameter are joined without fittings butt welding method. The raw material for the production of polypropylene pipes serves as a thermoplastic polymer. Soldering pipes are carried out using a simple device. The edge of the pipe is heated from the outside.