ISO 10471-2018 PDF

Full title and description

Glass-reinforced thermosetting plastics (GRP) pipes — Determination of the long-term ultimate bending strain and the long-term ultimate relative ring deflection under wet conditions. This International Standard specifies test procedures and extrapolation methods to determine long-term ring bending strain and to calculate long-term relative ring deflection for GRP pipes conditioned/subjected to wet environments; two loading arrangements (plate and beam-bar) are given.

Abstract

ISO 10471:2018 defines a method to determine by extrapolation the long-term ultimate ring bending strain and to calculate the long-term ultimate relative ring deflection of GRP pipes under wet conditions. The standard describes sample preparation, two loading methods (plates and beam bars), data collection and extrapolation procedures to estimate long-term behaviour from shorter laboratory tests.

General information

• Status: Withdrawn (superseded by a later edition).
• Publication date: May 2018 (2018-05; published mid-May 2018).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.040.20 (Plastics pipes).
• Edition / version: Edition 2 (ISO 10471:2018).
• Number of pages: 10 pages (formal ISO publication length).

Scope

Specifies a laboratory method for determining, by short-term test and mathematical extrapolation, the long-term ultimate ring bending strain and the long-term ultimate relative ring deflection of glass-reinforced thermosetting-plastic (GRP) pipes when tested under wet conditions. The procedure covers two loading techniques (plate loading and beam-bar loading) and gives guidance on sample preparation, test execution, data recording and extrapolation to long-term behaviour. It is intended for use on GRP pipe products where long-term bending or ring-deflection performance in wet environments is relevant.

Key topics and requirements

• Definition of long-term ultimate ring bending strain and long-term ultimate relative ring deflection and their relevance to GRP pipe performance.
• Two specified loading methods: plate loading and beam-bar loading; instructions on when each is applicable.
• Sample conditioning under wet conditions and required environmental/test setup.
• Data capture and recommended extrapolation techniques to estimate long-term behaviour from shorter-duration tests.
• Reporting requirements for test results, including calculated long-term strain and relative ring deflection values and test parameters.
• Applicability limits and notes on when beam-bar loading should be used for large-deflection expectations.

Typical use and users

Used by GRP pipe manufacturers, independent testing laboratories, product designers and R&D engineers assessing long-term structural performance of GRP pipes in wet service. Also used by certification bodies, procurement engineers and infrastructure specifiers who need validated long-term bending/deflection data for design, compliance and acceptance testing.

Related standards

Closely related standards and documents from ISO/TC 138/SC 6 include earlier and later editions of ISO 10471 (2003, 2018 and the later 2025 revision), other GRP piping system standards such as ISO 10467 (system properties for GRP-UP piping), ISO/TS 12512 (initial ring stiffness tests), and technical specifications addressing installation and system design (for example ISO/TS 10465‑1 and ISO/TS 10986). These documents are commonly referenced together when specifying design, testing and installation of GRP piping systems.

Keywords

GRP, GRP pipes, glass-reinforced thermosetting plastics, long-term bending strain, ring deflection, ring bending, wet conditions, plate loading, beam-bar loading, ISO 10471, plastics pipes, ISO/TC 138.

FAQ

Q: What is this standard?

A: ISO 10471:2018 is an ISO test standard specifying methods to determine by extrapolation the long-term ultimate ring bending strain and long-term ultimate relative ring deflection of GRP pipes under wet conditions.

Q: What does it cover?

A: It covers sample preparation, two laboratory loading methods (plate and beam-bar), test execution under wet conditions, data collection and extrapolation procedures to estimate long-term bending/deflection behaviour of GRP pipes.

Q: Who typically uses it?

A: GRP pipe manufacturers, independent test laboratories, design and R&D engineers, certification bodies and procurement/specification teams involved in infrastructure, drainage, sewerage and other applications where GRP pipe long-term mechanical performance is relevant.

Q: Is it current or superseded?

A: ISO 10471:2018 has been withdrawn and subsequently revised; a newer edition (ISO 10471:2025) is published as the current edition. Users should refer to the latest edition for current requirements.

Q: Is it part of a series?

A: Yes — the document belongs to the suite of ISO standards and technical specifications for GRP/plastics piping systems prepared by ISO/TC 138/SC 6; related documents include system standards (ISO 10467), ring-stiffness and stiffness-characteristic test methods (e.g., ISO/TS 12512), and installation/system design technical specifications.

Q: What are the key keywords?

A: GRP, glass-reinforced thermosetting plastics, pipes, long-term bending strain, ring deflection, wet conditions, plate loading, beam-bar loading, ISO 10471.