SIST EN ISO 11296-7:2019 PDF

Overview - EN ISO 11296-7:2019 (Spirally‑wound pipe lining)

EN ISO 11296-7:2019, published by CEN/ISO, specifies requirements and test methods for on‑site formed spirally‑wound pipes used to renovate underground non‑pressure drainage and sewerage networks. Used together with ISO 11296‑1 (Part 1: General), it covers pipes made by spirally winding a pre‑manufactured profiled plastics strip (with or without an integral locking joiner) - typically PVC‑U or HDPE - and their installation by dedicated winding machines.

Key topics and technical requirements

• Materials: profiled plastics strips of unplasticized PVC (PVC‑U) with integral locking mechanisms, or HDPE strips with integrally welded joints; thermoplastics and seam sealant categories are addressed.
• Pipe types: fixed or variable diameter spirally‑wound pipes, with or without steel stiffening elements.
• Installation methods:
  • Winding machine positioned at an open pipeline end (e.g., manhole) forming and inserting the lining forward.
  • Winding machine traversing the pipeline from manhole to manhole forming the lining in‑place.
• Stages of assessment:
  • “M” stage - requirements for components as manufactured (materials, geometry, mechanical/physical characteristics, jointing, marking).
  • “I” stage - verification of the lining as installed (fitness for purpose, installed characteristics, additional tests).
• Testing & inspection:
  • Mechanical, physical and geometric testing requirements for both M and I stages.
  • Annex A: normative test method for watertightness in a deflected condition.
  • Process‑related inspection, final testing, documentation and sample preparation are specified.
• Fittings & reconnections: requirements for fittings, ancillary components, methods for reconnecting laterals and manholes (Annex B informative examples).

Practical applications

• Renovation (no‑dig or minimal‑dig) of existing stormwater, drainage and sewer lines where gravity flow (non‑pressure) is maintained.
• In‑situ rehabilitation projects requiring liners tailored on site to variable diameters or obstructions.
• Situations demanding continuity of service with limited excavation and rapid reinstatement.

Who uses this standard

• Pipeline rehabilitation contractors and trenchless technology installers
• Specifying engineers and consulting civil/environmental engineers
• Municipal asset owners and utilities managing sewer/drainage networks
• Manufacturers of profiled plastics strips, winding machines and fittings
• Test laboratories and certification/inspection bodies

Related standards

• ISO 11296‑1 - Plastics piping systems for renovation - Part 1: General (use in conjunction)
• Other parts of the ISO 11296 series (lining with continuous pipes, pressure rehabilitation, etc.)
• Normative references cited in the text (e.g., ISO 10467, ISO 13262) provide related test/fitting specifications.

This standard is essential for specifying, manufacturing, testing and installing spirally‑wound plastic linings for reliable, long‑term renovation of underground non‑pressure sewer and drainage networks.