Overview
EN ISO 15877-3:2009/A2:2021 is Amendment 2 to ISO 15877-3 (endorsed by CEN) and updates requirements for plastics piping systems for hot and cold water installations using chlorinated poly(vinyl chloride) (PVC‑C). This amendment specifically revises Part 3 - fittings - clarifying material, dimensional, testing and appearance requirements and adding larger fitting sizes and referencing additional measurement and corrosion test standards.
Key topics and technical requirements
- Scope: Requirements for PVC‑C fittings used in hot and cold water supply systems (Part 3: Fittings) as amended in 2021.
- Normative references added: ISO 2768‑1, ISO 6506‑1, ISO 6509‑1, ISO 6957, ISO 22081 (measurement tolerances and metal test methods). EN 1254‑3 (copper plumbing fittings with compression ends for plastics pipes) was deleted.
- Definitions: Updated definition of compression fitting (internal support, union nut compressing a ring/clamping the pipe) - now allows fittings with or without a separate sealing element.
- Plastics and metallic materials:
- Plastic fitting material requirements and Vicat softening temperature (VST) test note - samples may be annealed per manufacturer recommendation.
- Metallic fitting materials limited to copper alloys or stainless steel alloys, with alloys defined per recognized standards/regulations and copper alloys subject to dezincification/corrosion resistance testing.
- Appearance and finish:
- Plastic and metal fittings must be smooth, clean and free from defects or production residues; ends must be perpendicular to the axis.
- Dimensions and tolerances:
- Plastic fitting dimensions: measured per ISO 3126.
- Metal fitting dimensions: measured per ISO 2768‑1 and/or ISO 22081.
- Updated dimensional tables (wall thicknesses, calculated Z‑lengths, laying lengths) expanded to include larger nominal diameters up to 250 mm.
- Testing and corrosion: References to Brinell hardness and corrosion/dezincification and ammonia stress corrosion tests for metallic components.
Practical applications and who uses it
- Manufacturers of PVC‑C fittings: design, production tolerances, material selection, and quality control.
- Plumbing system designers and specifiers: selecting compliant fittings for hot and cold potable water installations.
- Installers and plumbing contractors: verifying fitting dimensions, joint types (compression), and acceptable appearance/fit.
- Testing and certification bodies: applying referenced test methods (VST, hardness, dezincification, ammonia stress corrosion).
- Procurement and regulatory authorities: ensuring products meet EN ISO 15877-3:2009/A2 requirements for national adoption (implementation deadline noted by CEN: April 2022).
Related standards (selected)
This amendment strengthens dimensional ranges, testing references and metallic material requirements for PVC‑C fittings, helping manufacturers and specifiers ensure safe, reliable hot and cold water piping systems. Keywords: PVC‑C fittings, EN ISO 15877‑3, chlorinated poly(vinyl chloride), compression fittings, Vicat softening temperature, piping systems, water supply.