EN ISO 22391-2:2009 PDF

Overview

EN ISO 22391-2:2009 - Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE‑RT) - Part 2: Pipes - specifies requirements for pipes made of PE‑RT Type I and Type II used in building hot & cold water and heating systems. It defines material characteristics, dimensional and mechanical properties, test parameters and methods, and system performance limits for use under the design pressures and temperatures referenced in ISO 22391‑1. The standard applies to pipes with or without barrier layers and is intended to be used together with the other parts of ISO 22391 (fittings, fitness for purpose, etc.).

Key topics and technical requirements

• Material specification: Pipe material must be PE‑RT (Type I or Type II) and evaluated for long‑term strength using established test procedures.
• Long‑term hydrostatic performance: σ (stress) values are determined by long‑term hydrostatic testing (ISO 9080, ISO 1167 series) and must meet reference curves (from ISO 24033) across time and temperature ranges.
• Mechanical and physical tests:
  • Internal pressure resistance (ISO 1167‑1 / 1167‑2)
  • Long‑term hydrostatic strength extrapolation (ISO 9080)
  • Melt flow / MFR/MVR (ISO 1133‑1)
  • Dimensional checks (ISO 3126)
  • Longitudinal reversion (ISO 2505)
  • Opacity (ISO 7686)
• Geometrical and marking requirements: Specifies pipe dimensions, tolerances, opacity/appearance, and minimum marking information for traceability and installation.
• Scope limits: Not applicable for design or malfunction temperatures exceeding those in ISO 22391‑1. National regulations for potable water quality remain applicable.

Applications

• Domestic water distribution (potable and non‑potable) within buildings
• Domestic heating systems and hydronic circuits
• Embedded and exposed plumbing installations where long‑term thermal resistance and pressure performance are required
• Systems using pipes with barrier layers for diffusion control

Who should use this standard

• Pipe and raw‑material manufacturers (product development, quality control)
• System designers and specifiers (selection of pipe classes, pressure/temperature ratings)
• Plumbing and heating installers (installation compatibility, marking verification)
• Test laboratories and certification bodies (product evaluation and compliance testing)
• Regulators and procurement teams requiring harmonized technical specifications

Related standards

• ISO 22391‑1 (General)
• ISO 22391‑3 (Fittings)
• ISO 22391‑5 (Fitness for purpose)
• ISO 9080, ISO 1167, ISO 3126, ISO 1133‑1, ISO 2505 (test methods referenced)

Keywords: EN ISO 22391‑2:2009, PE‑RT pipes, plastics piping systems, hot and cold water installations, Type I, Type II, pipe testing, long‑term hydrostatic strength.