| 摘要 |
<p>An insert (10) for use in connecting two length of pipe each of use has a plastic liner. The insert consists of an inner tubular member (12) of plastics material for connection at either end to the liners of two pipe length's, an insulating sleeve (14) surrounding a central portion of the inner tubular member (12) and a ring (16) of heat-resistant material overlying part of the insulating sleeve (14) to be positioned, in use, beneath a location at which the pipe length or butt welded. The insulating sleeve (14) comprises an insulating material (22) which is at least partially enclosed with a sheath (24) such that the sheath (24) can be mechanically connected to the interior of one said pipe length.</p> |
