Overview
EN ISO 11296-4:2018 - "Plastics piping systems for renovation of underground non-pressure drainage and sewerage networks - Part 4: Lining with cured‑in‑place pipes (CIPP)" - is a CEN-adopted ISO standard that specifies requirements and test methods for cured‑in‑place pipes (CIPP) and associated fittings used to rehabilitate underground, non‑pressure drainage and sewerage networks. The standard covers materials, geometry, mechanical and physical properties, installation practice and testing for systems designed for service temperatures up to 50 °C. It applies to a variety of thermosetting resin systems used with compatible fibrous carrier materials and reinforcement.
Key topics and requirements
- Scope and materials: Requirements for thermosetting resins, fibrous carriers, reinforcement and process-related plastics components (see Clause 5.3).
- Product stages: Characteristics specified both at the “M” stage (manufactured components) and the “I” stage (installed lining, fitness for purpose).
- Geometric and mechanical properties: Wall thickness, jointing, flexural properties and long‑term performance under dry, wet or acidic conditions.
- Physical characteristics and marking: Identification, storage/handling requirements and material compatibility.
- Installation practice: Preparatory work, equipment, simulated installations, environmental precautions, reconnections, lining termination, final inspection and documentation.
- Testing methods: Normative annexes provide test procedures for:
- Short‑term flexural properties (Annex B)
- Long‑term flexural modulus under dry/wet conditions (Annex C)
- Long‑term flexural strength and stress‑corrosion testing (Annex D)
- Quality activities: Sampling, process‑related inspection and documentation for traceability and verification.
Applications and who uses it
EN ISO 11296-4:2018 is intended for use in trenchless rehabilitation and lining projects, including:
- Municipal and utility asset owners/specifiers preparing rehabilitation contracts
- Designers and engineers specifying CIPP solutions for non‑pressure drainage and sewer pipelines
- Manufacturers and suppliers of CIPP materials, resin systems and carrier tubes
- Installation contractors and installers performing on‑site curing and reconnection work
- Testing and certification laboratories performing mechanical and durability testing
- Regulatory bodies and procurement teams requiring standardized acceptance criteria
Typical applications include sewer rehabilitation, branch reconnections, host‑pipe lining where minimal excavation is desired, and upgrades to aging drainage networks.
Related standards
- ISO 11296‑1 (referenced by EN ISO 11296‑4:2018) - provides complementary requirements and general provisions for plastics piping systems used in renovation of underground non‑pressure networks.
- EN ISO 11296‑4:2018 supersedes EN ISO 11296‑4:2011 (updated edition adopted by CEN).
Keywords: EN ISO 11296-4:2018, CIPP, cured‑in‑place pipes, sewer rehabilitation, trenchless lining, thermosetting resin, non‑pressure drainage.