Overview
ISO/TS 17902:2016 defines requirements for wrapped electrofoaming joints used with polyethylene (PE) piping systems that have a smooth outer wall for non‑pressure underground gravity drains and sewers. The technical specification covers definitions, product range, materials, geometrical and mechanical characteristics, test methods and performance requirements for joints intended for pipe wall thicknesses greater than 1.4 mm and diameters up to DN/OD 2000 or DN/ID 2200.
Key topics and technical requirements
- Joint construction: Joints consist of a main layer (PE 80 or PE 100) and a foaming layer (containing foaming and adhesive additives and an embedded electrical heating element). A removable clamping band holds the wrap during assembly.
- Materials: Main layer materials must comply with ISO 12162. The foaming layer base material density is specified (≈ 911–940 kg/m³ measured per ISO 1183-1) with permitted additives to achieve expansion and adhesion.
- Electrical and assembly: The foaming layer contains electrical thermal wire and connection terminals; assembly uses an electrofusion welding machine supplying controlled current/voltage to activate the foaming/adhesion process.
- Dimensions and range: The standard specifies dimensional limits and clamping band characteristics for nominal sizes up to DN/OD 2000 (or DN/ID 2200).
- Testing and performance: ISO/TS 17902 references standard test methods and parameters (e.g., pressure resistance, watertightness and tensile tests) and defines appearance, colour, electrical and mechanical property requirements.
- Documentation and marking: Minimum marking and identification requirements for traceability and correct application are included, plus an informative joining‑procedure guide (Annex A).
Applications and practical value
- Used to produce watertight, reliable joints for PE sewer and drainage systems where no internal pressure is present (gravity flow).
- Applicable for rehabilitation and new‑build installations of underground drains, collector sewers, and branch connections where a smooth outer wall PE pipe is used.
- Benefits include controlled on‑site activation, compatibility with deviated pipe ends, and standardised quality and testing criteria to ensure long‑term performance.
Who should use this standard
- Pipe and fitting manufacturers designing wrapped electrofoaming products
- Civil engineers, specifiers and contractors installing PE sewer/drain systems
- Testing laboratories and quality assurance teams verifying compliance
- Regulators and procurement bodies seeking harmonised product requirements
Related standards
Normative references include ISO 12162, ISO 1183‑1, ISO 1167 (pressure testing), ISO 13254 (watertightness), ISO 8772 and ISO 21138 series - all relevant when specifying, testing or installing PE non‑pressure piping systems.
Keywords: ISO/TS 17902:2016, wrapped electrofoaming joints, polyethylene (PE), smooth outer wall, gravity drains, sewers, electrofoaming, clamping band, electrofusion.