Additional Information - Posters # 2006 Washington DC
Given the same operational pressure, the required thickness of molecularly oriented PVC pipes is 35-40% less than for PVC-U pipes. This is one of the various advantages of the material, which is interesting an increasing number of producers. The technical and commercial success of PVC-O pressure pipes relies heavily on the method of socket formation. In fact, the demand for automatic belling machines suitable for installation in PVC-O pipe extrusion lines emerged during the second half of the 1990s. SICA PVC-O belling machines represent a manufacturing solution which is both industrially efficient and simple to operate. They are the result of a fine-tuned processing system and precisely formulated design specifications. This document describes the socket formation process developed by SICA for PVC-O pressure piping intended for transport of pressurised fluids, as well as implementation of the process in fully automated machines intended for installation in PVC-O piping extrusion lines. Particular emphasis is given to aspects which determine the reliability and repeatability of the process.