Appliance for testing freedom from leaks of seal arrangement for pipes or shaft structures incorporates a test cell within annular joint seal

摘要

A spigot (2) and sleeve (3) joint has the gap (6) between them bridged by a ring seal (8). An annular slot (16) in the seal is filled with a medium permeable, compressible material Integral with the seal is an annular test cell (14). Holes (15) drilled at intervals between the seal contact area (10) of the slot, connect to the test cell. A pipe connection (18) links the test cell to a pressurized test medium and to monitoring devices.