ISO 22391-2:2009/Amd 1:2020

Overview

ISO 22391-2:2009/Amd 1:2020 is an important international standard that provides updated specifications for plastics piping systems specifically designed for hot and cold water installations. This amendment focuses on Part 2 of the series, which covers pipes made from polyethylene of raised temperature resistance (PE-RT). Published by the International Organization for Standardization (ISO), this document ensures consistency and quality in the dimensions and tolerances of PE-RT pipes, supporting enhanced durability and safety in water supply systems.

The 2020 amendment revises pipe dimensions, wall thicknesses, and tolerance requirements, ensuring that manufacturers and users follow precise guidelines aligned with the latest industry practices. This standard is a key reference for engineers, manufacturers, and regulatory bodies involved in plastic piping technologies for water installations that must withstand elevated temperatures.

Key Topics

• Pipe Dimensions and Series
  The amendment updates Table 3, detailing nominal sizes (DN/OD), mean outside diameters, and wall thicknesses for various pipe series (S 5, S 4, S 3.2, S 2.5). Sizes range from 12 mm to 250 mm, with minimum and maximum permissible wall thicknesses specified clearly for each class.

• Wall Thickness Tolerances
  Table 7 introduces precise tolerance limits on wall thickness measurements, adapting to ranges between 1.0 mm and over 40 mm. These tolerances comply with Grade V accuracy according to ISO 11922-1, maintaining high manufacturing precision.

• Material Standardization
  The focus on PE-RT ensures the pipes meet requirements for raised-temperature resistance, making them suitable for varying temperature conditions encountered in domestic and commercial water systems.

• Technical Cooperation
  The document reflects collaboration between ISO’s Technical Committee ISO/TC 138 and the European Committee for Standardization (CEN/TC 155), illustrating a harmonized approach for plastic piping standards.

Applications

• Hot and Cold Water Plumbing Systems
  The standard is applied widely in residential, commercial, and industrial plumbing systems where plastic piping must reliably carry both hot and cold potable water.

• Heating and Radiant Floor Installations
  Due to the raised temperature resistance of PE-RT pipes, they are ideal for heating applications such as underfloor heating or hot water distribution systems.

• Building and Construction Compliance
  Adhering to ISO 22391-2:2009/Amd 1:2020 helps manufacturers and builders ensure compliance with international performance, safety, and quality standards.

• Manufacturing and Quality Control
  The detailed dimensional and tolerance requirements streamline production processes, reduce variability, and enhance quality control, minimizing installation failures and maintenance costs.

Related Standards

• ISO 4065 - Pipes Dimensions for Thermoplastics
  Closely linked as pipe sizes in ISO 22391-2 align with the dimensions established in ISO 4065 for thermoplastic pipes.

• ISO 11922-1 - Plastics Pipes - Measurement of Dimensions
  Provides the classification and procedures for measurement tolerances referenced in the amendment for ensuring dimensional precision.

• ISO 22391-1 - Polyethylene of Raised Temperature Resistance (PE-RT) - Part 1: General
  Addresses general requirements for PE-RT piping systems and complements Part 2 on pipes.

• CEN/TC 155 Standards
  European standards for plastic piping systems, developed in cooperation with ISO, ensuring regional alignment and recognition.

Adopting ISO 22391-2:2009/Amd 1:2020 helps industry professionals maintain high-quality PE-RT plastic piping systems tailored for hot and cold water installations, enhancing durability and safety. Its clear specifications on dimensions and tolerance support efficient manufacturing and regulatory compliance worldwide. For detailed implementation, consulting the full ISO publication and related standards is recommended.