Patent · US Active

Process for the production of a pipe lined with an inliner

US10113671B2 · kind B2 · utility

2Cited by

7References

7Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Juergen Franosch · Marl, DE
Jan Berger · Oslo, NO
Andreas Dowe · Borken, DE
Marco Gensheimer · Duisburg, DE
Uwe Kannengiesser · Duisburg, DE

Key dates

Filing date	Mar 25, 2014
Grant date	Oct 30, 2018
Priority date	—
Expiry date	Dec 16, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/0318
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A process for the production of a pipe comprising: an interior surface having a shape; and a thermoplastic inliner is provided. The process comprises: introducing the thermoplastic inliner into the interior of the pipe; heating the pipe from the outside to a temperature higher than a crystallite melting point (Tm) of a molding composition of an exterior surface of the inliner; expanding the inliner radially in the pipe so that an exterior surface of the inliner assumes the shape of the interior surface of the pipe; and cooling the inliner; wherein a cross section of the inliner is optionally reduced through exposure to an exterior force prior to being introduced into the pipe. Relative movements between carrier pipe and inliner are thus prevented; the risk of collapse of the inliner is moreover low. The pipe is used for the production of a laid pipeline.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.