PROCESS FOR THE PRODUCTION OF A PIPE LINED WITH AN INLINER

• Main Authors: KANNENGIESSER, UWE, DOWE, ANDREAS, FRANOSCH, JUERGEN, BERGER, JAN, GENSHEIMER, MARCO
• Format: Patent
• Language: English; French
• Published: 28.09.2014
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A pipe, the interior surface of which has been lined with a thermoplastic layer is produced by a process which comprises the following steps: a) a pipe is provided, b) an inliner made of a thermoplastic material is provided, c) the cross section of the inliner is optionally reduced through exposure to an exterior force, d) the inliner is introduced into the pipe, e) the pipe is heated from outside to a temperature which is higher than the crystallite melting point T m of the moulding composition, while or after the inliner introduced is expanded radially, so that its exterior surface assumes the internal shape of the pipe, f) the inliner is cooled and is thus fixed. Relative movements between carrier pipe and Winer are thus prevented; the risk of collapse of the inliner is moreover low. The pipe is used for the production of a laid pipeline.