Overview
ISO 22391-3:2009/Amd 1:2020 is an important amendment to the international standard governing plastics piping systems designed for hot and cold water installations. This amendment specifically focuses on polyethylene of raised temperature resistance (PE-RT) fittings, which are essential components in modern plumbing and water supply systems. As part of the ISO 22391 series, this document provides updated technical requirements, especially socket dimensions for electrofusion fittings, ensuring improved reliability, safety, and performance in water piping applications.
The standard is maintained by ISO Technical Committee ISO/TC 138, in collaboration with European Committee for Standardization (CEN), ensuring compatibility and harmonization across different international markets.
Key Topics
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PE-RT Material for Piping Systems
The standard emphasizes the use of polyethylene of raised temperature resistance, a plastic material engineered to withstand higher temperatures typically encountered in hot water applications.
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Fittings Specifications
Part 3 of the ISO 22391 standard covers fittings for PE-RT piping systems. Amendment 1 updates critical technical parameters, including detailed dimensions for electrofusion fittings to support secure and efficient pipe connections.
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Electrofusion Socket Dimensions
Updated Table 6 in the amendment specifies minimum mean inside diameters, nominal lengths, and depths of penetration for various nominal diameters ranging from 16 mm to 250 mm. These precise specifications ensure proper fusion zone dimensions for weld strength and leak-proof joints.
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Standard Harmonization & Compliance
Developed under ISO’s editorial rules and collaborative framework with CEN, this amendment helps maintain consistent quality and interoperability in international plastics piping components.
Applications
ISO 22391-3:2009/Amd 1:2020 serves as a crucial guideline for:
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Water Supply Systems
Designing and installing durable hot and cold water delivery systems in residential, commercial, and industrial buildings using PE-RT piping systems.
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Plumbing and Heating Installations
Facilitating reliable pipe connections that can handle raised temperatures without compromising safety or structure, ideal for heating circuits and domestic hot water lines.
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Manufacturing of PE-RT Fittings
Helping manufacturers produce fittings that meet global standards for dimension, durability, and performance, thus ensuring product acceptance worldwide.
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Quality Assurance and Testing
Assisting testing agencies and quality control teams in verifying that fittings conform to internationally recognized specifications to prevent failures.
Related Standards
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ISO 22391 Series
Covers polyethylene of raised temperature resistance (PE-RT) piping systems comprehensively, including pipes (Part 1), joints (Part 2), and fittings (Part 3).
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ISO/TC 138 Standards
A broader set of standards addressing plastics pipes, fittings, and valves for fluid transport, offering guidelines on various materials and applications beyond PE-RT.
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CEN/TC 155 Standards
European standards for plastics piping and ducting systems that harmonize with ISO requirements for cross-regional consistency.
Adhering to ISO 22391-3:2009/Amd 1:2020 ensures that PE-RT fittings in water installation systems achieve optimal performance, compliance, and safety. This standard is essential reading for engineers, manufacturers, and installers seeking to implement advanced plastics piping technologies in hot and cold water service lines.
Open preview (PDF)Plastics piping systems for hot and cold water installations — Polyethylene of raised temperature resistance (PE-RT) — Part 3: Fittings — Amendment 1
