Overview
EN ISO 15877-2:2009/A1:2010 is Amendment 1 to Part 2 of the ISO/CEN standard series for plastics piping systems for hot and cold water installations. It covers chlorinated poly(vinyl chloride) (PVC‑C) - Type I pipes and updates design parameters used for pressure‑rated PVC‑C piping. The amendment was prepared under the Vienna Agreement (CEN lead) by CEN/TC 155 in collaboration with ISO/TC 138.
Key topics and technical requirements
- Addition of Application Class 4: Amendment 1 introduces Class 4 (as defined in ISO 10508) to allow PVC‑C Type I piping for certain low‑temperature heating service conditions (notably service pressures of 4 and 6 bar).
- Updated S‑values (calc,max) for PVC‑C Type I (used to derive pipe wall thickness and pressure capability). Key S‑values inserted:
- Design pressure 4 bar: Class 1 = 10.0, Class 2 = 10.0, Class 4 = 10.0
- Design pressure 6 bar: Class 1 = 7.3, Class 2 = 7.1, Class 4 = 7.4
- Design pressure 8 bar: Class 1 = 5.5, Class 2 = 4.8, Class 4 = Not applicable
- Design pressure 10 bar: Class 1 = 4.4, Class 2 = 4.2, Class 4 = Not applicable
- (Values rounded as in the amendment; the 20 °C / 10 bar / 50 years cold‑water requirement determines the 10 bar value per ISO 15877‑1:2009.)
- Revised design stress (σD) table for PVC‑C Type I (rounded to two decimals):
- Class 1: 4.38 MPa
- Class 2: 4.16 MPa
- Class 4: 4.46 MPa
- Derivation and method: The amendment notes that the derivation of S is provided in Annex A and that the method accounts for PVC‑C properties under the specified service conditions.
Applications and who uses this standard
- Useful for pipe manufacturers, product designers and material engineers specifying PVC‑C pipes for potable hot and cold water services and low‑temperature heating systems.
- Relevant to plumbing contractors, system specifiers, testing laboratories, certification bodies and regulatory authorities assessing compliance with European and international piping requirements.
- Helps manufacturers set wall thickness, pressure ratings and design life calculations when claiming conformity with EN/ISO piping standards.
Related standards and context
- ISO 15877‑1:2009 - general principles for PVC‑C piping systems (referenced for the 20 °C / 10 bar / 50‑year requirement).
- ISO 10508 - defines application classes used to classify service conditions (Class 4 referenced here).
- Prepared by CEN/TC 155 in collaboration with ISO/TC 138 under the Vienna Agreement - indicates parallel CEN/ISO processing and adoption by CEN national members.
Keywords: PVC‑C pipes, EN ISO 15877‑2, plastics piping systems, design pressure, S‑values, design stress, low‑temperature heating, CEN, ISO.
