Plastics piping systems for renovation of underground non-pressure drainage and sewerage networks - Part 7: Lining with spirally-wound pipes (ISO 11296-7:2019)

This technical specification outlines the requirements and guidance for the rehabilitation of plastic drainage pipes and underground sewage networks through the installation of spiral wound liners. It serves as a specialized guide for professionals involved in restoring structural integrity and hydraulic capacity to aging or damaged pipe systems without the need for extensive excavation. The document focuses on the material properties, geometric dimensions, and installation procedures specific to spiral winding techniques, ensuring compatibility with existing infrastructure. It addresses key aspects such as resin selection, winding tension, and joint sealing to achieve a durable, leak-proof lining within the host pipe. The scope covers the assessment of the host pipe, preparation of the site, and the mechanical deployment of the polymeric strip to form a continuous, structural liner. By adhering to these technical provisions, contractors can execute repairs that extend the service life of underground utilities while minimizing disruption to the surrounding environment and public services. The guidelines ensure that the rehabilitation process meets established engineering criteria for safety and performance in various soil and flow conditions typical of municipal drainage systems.