| 摘要 |
An insert for the free end of a pipe. The insert comprises a body having first and second ends, and defining a fluid flow path between the first and second ends. The first end of the insert is configured for insertion into the free end of a pipe, and is further configured for providing a seal between the insert and the inside of the pipe in the absence of fluid flowing through the pipe. The second end of the insert is configured to project from the free end of the pipe when the first end of the insert is in sealing communication with the inside of the pipe, and is further configured for providing a seal against part of a pipe connector in the absence of fluid flowing through the pipe. The insert is configured for modifying the effective sealing action of the second end under activation from fluid flowing through the insert under pressure. |
