| 摘要 |
The invention is a multi-layered composite pipe resistant to pressure and corrosion, which is used in the sanitary systems, comprising at least one inner pipe (1) with low permeability for oxygen and at least one aluminum folio (3) coated on the said inner pipe (1) and having an expansion coefficient with respect to pressure or temperature variation that is lower as compared to the said inner pipe (1), wherein, in order to secure the aluminum coating (3) along with the inner pipe (1) inside the extension piece without peeling off the said coating, at least one filling duct (3.1) is provided in the form of a canal that makes it possible to shave the surface of the said aluminum coating (3) visible at the end part of the composite pipe and to leave it inside the plastic and to embed therein and to cover the shaved volume by filling with plastic material. |
