| 摘要 |
The present invention relates to internally lined metal pipes, and specifically to such pipes which include means for sealing the liner of two pipes when the pipes are joined together end-to-end. To this end an outer main pipe (5, 17, 22, 27) is provided with a plastics liner sleeve (7, 28) insertable in the pipe (5, 17, 22, 27) and having a projecting end portion (8) forming a sealing band. An annular flange ring (9, 20, 26) is placed at or adjacent the end (8) and has an inner diameter less than the outer diameter of end 8. A spigot (13, 23, 29) is provided on the flange ring to form a companion sealing band so that one sealing band encircles the other with a sealing ring (14) located between the sealing bands and a gasket seal locatable between abutting flange-rings (9, 20, 26) of end to end pipes. |
