Pipe socket joint secured against decoupling

摘要

Two pipes are joined with a sleeve fit. The interface zone between the two pipes is closed by an O-ring seal consisting of a first section of relatively hard material (H) and a second section of softer material (D). The seal is a one-piece unit. The hard section incorporates an essentially narrow U-shaped circular groove (15), while the soft section incorporates an essentially wide U-shaped groove (14) at right angles to the first (15).