Pipe coupling for transition between metal and plastics pipe sections in gas or fluid pipeline uses sealing sleeve inserted between concentric pipe section ends

摘要

The pipe coupling for a gas or fluid pipeline uses a sealing sleeve (4) fitted between a metal pipe section (1) and a concentric plastics pipe section (3). The sealing sleeve has a bead at either end and a thickened central section, with one of the end beads and the thickened central section fitting into respective grooves provided in the outer surface of the inner pipe section.