Use of a polyamide molding compound for lining conduits
AssigneeEvonik Degussa GmbH
InventorsAndreas Dowe, Ralf Tuellmann, Reinhard Beuth, Franz-Erich Baumann
Life of this patent
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Abstract
In a method for the introduction of an inliner into a pipe or a pipeline, where the external diameter of the inliner is greater than the internal diameter of the pipe or of the pipeline, and where the action of an external force is used to reduce the cross section of the inliner prior to the introduction, the inliner is composed of a polyamide moulding composition which comprises at least 50% by weight of polyamide which is not PA11. The recovery behavior of said polyamides is similar to that of polyethylene usually used for this purpose.
Claims17
A method comprising introducing an inliner into a pipe or a pipeline, wherein an external diameter of the inliner is greater than an internal diameter of the pipe or of the pipeline;
- an external force reduces a cross section of the inliner prior to the introduction;
- and
- the inliner comprises a polyamide moulding composition which comprises at least 50% by weight of polyamide selected from the group consisting of PA610, PA612, PA613, PA1010, PA1012, PA1014, PA12, PA1212 and materials based thereon which are polyetheresteramides or which are polyetheramides.
Dependencies are inferred from the claim text.