ISO 10471:2025

Name: ISO 10471:2025 — 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
SKU: ISO 10471:2025
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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

Название (английский):

ISO 10471:2025

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 27 августа 2025 г.
Издание:: ISO IS 10471 edition 3 version 1
ICS:: 23.040.20

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Описание (английский):

This document specifies a method for determining by extrapolation the long-term ultimate ring bending strain and for the calculation of the long-term ultimate relative ring deflection of glass-reinforced thermosetting plastics (GRP) pipes, under wet conditions. Two methods of loading are given, one using plates the other using beam bars.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10471:2025 specifies a laboratory method for determining, by extrapolation, the long‑term ultimate bending strain and the long‑term ultimate relative ring deflection of glass‑reinforced thermosetting plastics (GRP) pipes under wet conditions. The standard covers test arrangement, apparatus, specimen preparation and conditioning, measurement procedures and the use of regression/extrapolation to predict long‑term performance. Two loading approaches are provided: loading with bearing plates or with beam bars.

Key topics and technical requirements

Scope: Measurement of ring bending strain and relative ring deflection of GRP pipes immersed in water and loaded diametrically under a constant vertical compressive force until failure.

Loading methods: Two accepted force application surfaces - plates or beam bars - with a requirement to use at least one beam bar when relative deflection is expected to exceed 28%.

Apparatus: Compressive loading machine, force application surfaces (plates/beam bars), water container, and measuring devices (automatic recorders recommended for fast failures).

Specimen details: Requirements for specimen length, wall thickness and mean diameter; number of test pieces and conditioning (Clause 9 aligned with ISO 23856).

Environment: Test water temperature and pH shall be set by the referring standard; if unspecified, default is (23 ± 5) °C and pH 7 ± 2.

Measurement and conversion: Vertical deflection (y) is recorded; ultimate relative deflection y/dm is converted to ultimate bending strain εu,wet using the standard’s formulas or waterproof strain gauges. Neutral axis location must be considered where wall construction alters it.

Extrapolation: Time‑to‑failure data and corresponding strains are analyzed per ISO 10928 regression methods to derive long‑term (x‑year) values εu,wet,x.

Reporting: Test method choices (plates vs bars), test conditions, specimen geometry, and extrapolation parameters must be recorded in the test report.

Applications and who uses it

ISO 10471:2025 is intended for:

Manufacturers of GRP pipes for product development, quality control and lifetime assessment.

Independent test laboratories performing standardized durability testing.

Design engineers and specifiers who need validated long‑term bending strain and ring deflection data for GRP pipe selection and structural assessments.

Standards bodies and certification authorities requiring consistent methods for comparing GRP pipe performance.

Practical uses include verifying pipe resistance to long‑term diametral loading in wet environments and producing data for service life prediction and compliance with product specifications.

Related standards

ISO 10928 - regression analysis and use for extrapolation

ISO 7685 - initial ring stiffness of GRP pipes

ISO 3126 - determination of dimensions for plastic piping components

ISO 23856 - conditioning procedures referenced for specimen preparation

Keywords: ISO 10471:2025, GRP pipes, glass‑reinforced thermosetting plastics, long‑term bending strain, ring deflection, wet conditions, test method, extrapolation, ISO 10928.

ISO 10471:2025

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 10928:2024

Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Methods for regr…

ISO 7685:2019

Glass-reinforced thermosetting plastics (GRP) pipes — Determination of initial ring stiffness

BS EN ISO 3126:2005

Plastics piping systems. Plastics components. Determination of dimensions.