ISO 16486-5:2021 PDF

Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 5: Fitness for purpose of the system

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Title (English):

ISO 16486-5:2021

Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 5: Fitness for purpose of the system

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: May 11, 2021
Edition:: ISO IS 16486 edition 2 version 1
ICS:: 75.200

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Description (English):

This document specifies the requirements of fitness for purpose of unplasticized polyamide (PA-U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies the definitions of electrofusion and butt fusion joints. This document specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions. It also specifies the test parameters for the test methods to which it refers. The ISO 16486 series is applicable to PA-U piping systems, the components of which are connected by fusion jointing and/or mechanical jointing. In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to joints with components of PA-U.

Technical details

Technical committee: ISO/TC 138/SC 4 - Plastics pipes and fittings for the supply of gaseous fuels
SKU: ISO 16486-5:2021

Abstract

Overview

ISO 16486-5:2021 specifies the fitness for purpose requirements for unplasticized polyamide (PA‑U) piping systems used for the supply of gaseous fuels. It applies to buried PA‑U pipe and fittings connected by fusion jointing (butt fusion) and electrofusion, and to mechanical and transition fittings where PA‑U is joined to metallic pipes. The standard describes how to prepare test assemblies, the test methods and parameters for assessing joints under normal and extreme conditions, and includes annexes on test preparation, temperature derating and rapid crack propagation (RCP).

Keywords: ISO 16486-5:2021, PA‑U piping, fusion jointing, electrofusion, butt fusion, fitness for purpose, gaseous fuels

Key Topics

Definitions and scope: Clear definitions of electrofusion joint, butt fusion joint, fusion compatibility, transition fitting and transition joint.
Test assembly preparation: Procedures for preparing butt-fusion and electrofusion test pieces (Annex A and B), with references to ISO 11414 and ISO 11413 for assembly methods.
Joint testing requirements: Tests to assess fitness for purpose under normal (ambient ~23 °C) and extreme conditions, including specific preparation requirements for socket and saddle electrofusion fittings.
Design coefficient and derating: Inclusion of a design coefficient clause and derating coefficients for operating temperatures (Annex C).
RCP resistance: Assessment of Rapid Crack Propagation (RCP) resistance at temperatures below 0 °C (Annex D).
Normative references: Cross‑references to other relevant standards (e.g., ISO 1167, ISO 16486‑1/2/3/6, ISO 17885) that define materials, components and test methods.

Applications

ISO 16486-5 is used to ensure the safety, reliability and long‑term performance of PA‑U piping systems for gas distribution. Typical users include:

Manufacturers of PA‑U pipes, electrofusion and butt-fusion fittings - for product development, type testing and declaration of fitness for purpose.
Testing and certification bodies - for laboratory test protocols, acceptance criteria and conformity assessment.
Gas utilities and network operators - for specifying components and validating supplier claims for buried gas mains and service lines.
Designers and installers - to understand jointing procedures, limitations and the required tests for extreme conditions.
Regulators and procurement teams - for referencing standardized test evidence in approvals and contracts.

Related Standards

ISO 16486 series (Parts 1–6) - general, pipes, fittings, materials, installation code of practice
ISO 11413, ISO 11414 - preparation of electrofusion and butt-fusion test assemblies
ISO 1167 - resistance to internal pressure test methods
ISO 17885 - mechanical fittings for pressure piping systems

By following ISO 16486-5:2021, stakeholders can demonstrate that PA‑U piping systems and their fusion or mechanical joints meet internationally recognized criteria for safe use in buried gas distribution networks.

Related standards

Standards mentioned in the description

Abstract

Overview

Keywords: ISO 16486-5:2021, PA‑U piping, fusion jointing, electrofusion, butt fusion, fitness for purpose, gaseous fuels

Key Topics

Definitions and scope: Clear definitions of electrofusion joint, butt fusion joint, fusion compatibility, transition fitting and transition joint.
Test assembly preparation: Procedures for preparing butt-fusion and electrofusion test pieces (Annex A and B), with references to ISO 11414 and ISO 11413 for assembly methods.
Joint testing requirements: Tests to assess fitness for purpose under normal (ambient ~23 °C) and extreme conditions, including specific preparation requirements for socket and saddle electrofusion fittings.
Design coefficient and derating: Inclusion of a design coefficient clause and derating coefficients for operating temperatures (Annex C).
RCP resistance: Assessment of Rapid Crack Propagation (RCP) resistance at temperatures below 0 °C (Annex D).
Normative references: Cross‑references to other relevant standards (e.g., ISO 1167, ISO 16486‑1/2/3/6, ISO 17885) that define materials, components and test methods.

Applications

ISO 16486-5 is used to ensure the safety, reliability and long‑term performance of PA‑U piping systems for gas distribution. Typical users include:

Manufacturers of PA‑U pipes, electrofusion and butt-fusion fittings - for product development, type testing and declaration of fitness for purpose.
Testing and certification bodies - for laboratory test protocols, acceptance criteria and conformity assessment.
Gas utilities and network operators - for specifying components and validating supplier claims for buried gas mains and service lines.
Designers and installers - to understand jointing procedures, limitations and the required tests for extreme conditions.
Regulators and procurement teams - for referencing standardized test evidence in approvals and contracts.

Related Standards

ISO 16486 series (Parts 1–6) - general, pipes, fittings, materials, installation code of practice
ISO 11413, ISO 11414 - preparation of electrofusion and butt-fusion test assemblies
ISO 1167 - resistance to internal pressure test methods
ISO 17885 - mechanical fittings for pressure piping systems

ISO 16486-5:2021 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

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