Overview
ISO 11296-9:2022 specifies requirements and test methods for renovating underground non‑pressure drainage and sewerage networks by lining with a rigidly anchored plastics inner layer. Used together with ISO 11296‑1, this part covers systems where a single rigid annulus of structural cementitious grout is formed behind a plastics inner layer that acts as permanent formwork and is rigidly anchored to the grout. The document applies to plastics inner layers and grout systems with or without steel reinforcement, but does not cover structural design or patented multi‑annulus systems.
Keywords: ISO 11296-9:2022, plastics piping systems, renovation, lining, rigidly anchored plastics inner layer, non-pressure drainage, sewerage networks, cementitious grout.
Key topics and requirements
- Scope and applicability: Renovation technique for non‑pressure drainage and sewerage networks using a single rigid annulus grout behind a plastics inner layer.
- Materials: Requirements for plastics inner layers (e.g., studded PE sheets, profiled plastics strips, PVC‑U) and grout systems; includes provisions for components, seam sealants and optional steel reinforcement.
- Geometric, mechanical and physical characteristics: Defined properties for manufactured components (“M” stage) and verification of the installed lining (“I” stage).
- Jointing and sealing: Welding and mechanical jointing methods for forming the inner layer tube and ensuring integrity.
- Testing and inspection: Included normative test methods such as anchoring strength by pull‑off (Annex A) and installed crushing strength (Annex B), sampling, process inspection and final testing.
- Installation practice: Guidance on preparatory work, storage, handling, equipment, installation steps, termination, lateral reconnections and documentation.
- Marking and traceability: Marking requirements for plastics inner layers and packaged grout.
- Normative references: References to related test standards (e.g., ISO 37, ISO 48‑4, ISO 75‑2, ISO 306) for material testing.
Applications and users
ISO 11296-9:2022 is intended for:
- Municipal and utility engineers specifying sewer rehabilitation contracts
- Manufacturers of plastics inner layers, grout systems and prefabricated lining components
- Rehabilitation contractors and installers performing trenchless lining works
- Test laboratories and certification bodies performing material and installed‑system verification
- Asset owners and consultants preparing technical specifications and compliance documentation
Practical applications include relining deteriorated non‑pressure sewer and drainage pipelines using a plastics inner layer as permanent formwork for a cementitious structural annulus.
Related standards
- ISO 11296‑1 (General requirements for renovation system standards) - use in conjunction with Part 9
- Other parts of the ISO 11296 series cover different renovation techniques (continuous pipes, cured‑in‑place, sprayed materials, etc.)
- Material test standards referenced in normative clauses (e.g., ISO 37, ISO 48‑4)
For specification and compliance, consult ISO 11296‑9:2022 together with ISO 11296‑1 and relevant local regulations.
Open preview (PDF)Plastics piping systems for renovation of underground non-pressure drainage and sewerage networks — Part 9: Lining with a rigidly anchored plastics inner layer