Method for lining underground pipelines

US6302983A · kind A · utility

Assignee

• UPONOR INNOVATION AB · SE

Inventors

• Lennart Agren · Borås, SE
• Arne Lund · Borås, SE
• Alan J. Dickinson · Cramlington, GB
• Veli-Pekka Jormakka · Salpakangas, FI
• Bo Mollsjo · Borås, SE
• Harri Leo · Fristad, SE
• Jyri Jarvenkyla · Viinijärvi, FI

Key dates

• Filing date: Oct 28, 1998
• Grant date: Oct 16, 2001
• Expiry date: Oct 28, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2009/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for renovation of pipelines, comprising introduction of lining layers into the existing pipeline, the lining layers corresponding in length to the length of the pipeline to be renovated. The lining layers consist of fusible polymers and are presurized and fused together by the introduction of a heat source into the inside of the innermost lining layer.