| 摘要 |
When pipes (12) provided with comparatively rigid linings (10), the gaps (28) which tend to appear between the pipe (12) and the lining (10) along the length thereof, and through which gaps (28) gaseous type contents tend to escape, are sealed by providing between the pipe (12) and the lining (10) radially expandable sealing rings (26, 26a, 26b) spaced along the length of the pipe (12), those rings (26, 26a, 26b) compressing when the lining (10) is in place and only partially expanding if the lining (10) tends to separate from the pipe (12), thereby to provide a series of annular seals (26, 26a, 26b) along the length of the pipe (10). The sealing rings (26, 26a, 26b) may be positioned within the pipe (12) before the lining (10) is applied or may be initially secured to the lining (10) and moved into place with the lining (10). |
