About us Products / Technologies Markets News Home Products / Technologies Piping & Valves Pipe and Sewage Renewal Pipe and Sewage Renewal Winding technologies for rehabilitation of gravity pipelines for diameter dn 150 mm - 5500 mm. Sekisui spiral wound technologies are used all over the world for a time and cost efficient rehabilitation of pipes. These technologies are used for gravity pipelines based on the principle of winding a continuous, factory manufactured, plastic strip into a liner. The benefits at a glance: Rehabilitation of circular, non-circular and custom shapes Designed for installation in live flow conditions Rehabilitation of curves and bends (>5D) Environmental-friendly installation and application Factory production of the installation materials The economic method on a short and long-term basis Over 4.700 km successfully installed worldwide SPR SPR EX (DN 150 -1050mm) and SPR TF (DN 800 -1750mm) SPR PE (DN 900 - 3000mm) and SPR TM (DN 800 -5550mm) More about SPR Technologies More about the product configurator Copyright (C) 2021 SEKISUI CHEMICAL GmbH Imprint AGB / GTCS Privacy policy