ISO 24131-2:2023 PDF

Name: ISO 24131-2:2023 — Internal protection by polymeric lining for ductile iron pipes — Requirements and test methods — Part 2: Epoxy lining
SKU: ISO 24131-2:2023
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Internal protection by polymeric lining for ductile iron pipes — Requirements and test methods — Part 2: Epoxy lining

Название (английский):

ISO 24131-2:2023

Internal protection by polymeric lining for ductile iron pipes — Requirements and test methods — Part 2: Epoxy lining

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 31 марта 2023 г.
Издание:: ISO IS 24131 edition 1 version 1
ICS:: 23.040.10

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Описание (английский):

This document specifies the requirements and test methods applicable to factory applied internal epoxy lining for ductile iron pipes according to ISO 2531, ISO 7186 and ISO 16631. It covers internal linings for use in the conveyance of raw water, potable water and sewage water for operating temperature up to 50 °C.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 24131-2:2023 - Internal protection by polymeric lining for ductile iron pipes - Part 2: Epoxy lining defines requirements and test methods for factory‑applied internal epoxy linings on ductile iron pipes (per ISO 2531, ISO 7186 and ISO 16631). The standard covers epoxy linings used in the conveyance of raw water, potable water and sewage at operating temperatures up to 50 °C, and applies to both fusion‑bonded epoxy powder and two‑pack liquid epoxy systems.

Key technical topics and requirements

Scope: Factory applied internal epoxy lining for ductile iron pipes for water and sewage applications (≤ 50 °C).

Lining types: Fusion‑bonded epoxy powder and two‑pack liquid epoxy (resin + hardener).

Surface preparation: Surfaces must be clean, oil‑ and moisture‑free; manufacturer must demonstrate fitness‑for‑purpose. Guidance references ISO 8501‑1 (Class Sa 2.5) and ISO 8502‑3 for dust criteria.

Appearance: Uniform colour and smoothness; free of visible defects (pinholes, bubbles, blisters, cracks), with minor chalking or repair marks permitted.

Minimum thickness: Local thickness > 200 µm; average thickness ≥ 250 µm (measured per 6.1.3).

Adhesion: Pull‑off test (ISO 4624) or cross‑cut knife test (Annex B). Required adhesion: average ≥ 8.0 MPa, minimum single value ≥ 6.0 MPa.

Cross‑linking: Assessed by MIBK test and ΔTg (ISO 11357‑2) to verify cure.

Non‑porosity (holiday test): Electrical puncture testing to ensure absence of pinholes.

Performance tests: Include abrasion and chemical resistance (for sewage), impact and indirect impact resistance, resistance to hot water, and resistance to ovalization.

Quality assurance: Manufacturer quality control requirements are specified in Annex A; handling, transport and storage guidance in Annex C.

Test classification: Routine production tests and performance tests (for material/process changes).

Applications and practical value

Protecting ductile iron pipe interiors from corrosion and degradation in drinking water distribution, raw water transfer, and sewage systems.

Ensuring safe contact materials for potable water by specifying adhesion, non‑porosity and chemical resistance.

Providing procurement and specification criteria for pipe manufacturers, coating applicators, testing laboratories and utilities.

Enabling consistent factory quality control and traceability for infrastructure projects.

Related standards

ISO 2531 - Ductile iron pipes, fittings and joints for water applications

ISO 7186 - Ductile iron products for sewerage applications

ISO 16631 - Ductile iron pipes compatible with plastic piping systems

ISO 4624 - Pull‑off test for adhesion

ISO 11357‑2 - Differential scanning calorimetry (glass transition)

Keywords: ISO 24131-2:2023, epoxy lining, ductile iron pipes, internal protection, polymeric lining, test methods, lining thickness, adhesion, holiday test, potable water, sewage.

ISO 24131-2:2023 PDF

Abstract

Похожие стандарты

Overview

Key technical topics and requirements

Applications and practical value

Who should use this standard

Related standards

Технические детали

ISO 2531:1998

Ductile iron pipes, fittings, accessories and their joints for water or gas applications

ISO 7186:1996

Ductile iron products for sewage applications

ISO 1663:1999

Rigid cellular plastics — Determination of water vapour transmission properties

SIST EN ISO 8501-1:2007

Preparation of steel substrates before application of paints and related products - Visual assessment of surf…

SIST EN ISO 8502-3:2017

Preparation of steel substrates before application of paints and related products - Tests for the assessment…

SIST EN ISO 4624:2023

Paints and varnishes - Pull-off test for adhesion (ISO 4624:2023)

BS EN ISO 11357-2:2020

Plastics. Differential scanning calorimetry (DSC). Determination of glass transition temperature and step hei…