| 摘要 |
In the bonding method, a first plastics pipel, with a first end 2 at least heat expandable, e.g. cross-linked, is positioned within a ferromagnetic heating element 5, preferably embedded in a plastics insert 6, the pipe end is heated to expand it into contact with the heating element and the pipe end and heating element are fused to a second pipe end, sleeve 3, or fitting formed from a second plastics material by energising the heating element by induction heating, the heating element having a Curie temperature equal to or greater than the crystalline melting point or softening point of the second plastics material. The method can be used for relining existing pipes in situ. The first pipe, or its end, is initially radially contracted by die or axial elongation. |
