DIN EN ISO 23856 2023-08 PDF

Full title and description

DIN EN ISO 23856:2023-08 — Plastics piping systems for pressure and non-pressure water supply, drainage or sewerage — Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin. This document is the German (DIN) adoption of EN ISO 23856 (based on ISO 23856:2021) and specifies requirements, properties and application guidance for GRP (UP) piping systems used in potable water, drainage, sewerage and other water-related applications.

Abstract

This standard specifies the properties of piping system components made from glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP). It covers pipes, fittings and joints (flexible or rigid), nominal sizes typically from DN 50 to DN 4000, and is intended primarily for direct buried installations but may also be used for non-buried applications when environmental/support conditions are considered. The document replaces earlier GRP piping standards to provide a single harmonised reference for design and manufacture.

General information

• Status: Published / Current.
• Publication date: August 2023 (designation: 2023-08).
• Publisher: Deutsches Institut für Normung (DIN) — as DIN EN ISO adoption of ISO 23856.
• ICS / categories: 23.040.20 (Plastics pipes), 91.140.80 (Drainage systems), 93.030 (External sewage systems).
• Edition / version: DIN EN ISO 23856:2023-08 (German adoption of EN ISO 23856:2021 / ISO 23856:2021).
• Number of pages: 78 pages (DIN published version).

Scope

The standard applies to GRP piping systems based on unsaturated polyester (UP) resin and covers the properties, dimensions, tolerances, joint types (flexible and rigid), mechanical and hydrostatic design considerations, testing and inspection requirements, and guidance for buried and certain non-buried installations. It is intended for water supply (including potable water), irrigation, cooling water, salt/sea water, penstocks, processing plants, drainage and sewerage systems. The standard also clarifies that the term UP can include vinyl-ester resins in certain contexts and aligns/replaces earlier related ISO and EN documents.

Key topics and requirements

• Material definition and composition for GRP (UP) systems, including mention that UP may include vinyl-ester (VE) in scope.
• Dimensional requirements, nominal sizes (typically DN 50–DN 4000) and tolerances for pipes and fittings.
• Joint types and performance criteria (flexible and rigid joints, end thrust considerations).
• Hydrostatic pressure design principles and related factors of safety (references to structural reliability principles).
• Testing, inspection and quality requirements for manufacture and installation (including references to applicable test methods).
• Chemical resistance and suitability guidance for different water types (potable, seawater, wastewater) and service conditions.

Typical use and users

Typical users are pipe manufacturers, materials engineers, design and structural engineers, water and wastewater utilities, contractors and installers of buried and surface piping systems, procurement/specification teams, and conformity/inspection bodies. The standard is used to specify product performance, inform selection and installation practice, and provide a harmonised baseline for regulatory and contract requirements.

Related standards

ISO 23856:2021 supersedes and consolidates material from earlier documents such as ISO 10467 and ISO 10639; national/EN predecessors include EN 1796 and EN 14364. The standard also references related documents for design reliability and hydrostatic design (for example ISO 2394 and ISO/TS 20656-1) and may be used alongside standards such as ISO 25780 for specific GRP pipe applications.

Keywords

GRP, GFK, UP resin, vinyl-ester, plastics piping systems, water supply, drainage, sewerage, buried pipes, pipe fittings, joints, hydrostatic design, DIN EN ISO 23856.

FAQ

Q: What is this standard?

A: DIN EN ISO 23856:2023-08 is the German adoption of EN ISO 23856 (based on ISO 23856:2021). It defines requirements and recommendations for glass-reinforced thermosetting plastics (GRP) piping systems based on unsaturated polyester (UP) resin used for water supply, drainage and sewerage applications.

Q: What does it cover?

A: It covers material definitions, dimensions and tolerances, joint types (flexible and rigid), hydrostatic and structural design considerations, testing and inspection, chemical suitability for different water types, and guidance for buried and certain non-buried installations.

Q: Who typically uses it?

A: Manufacturers of GRP pipes and fittings, civil and pipeline engineers, water and wastewater utilities, contractors, specifiers and conformity/inspection bodies use the standard to specify, design, procure and verify GRP piping systems.

Q: Is it current or superseded?

A: The DIN adoption (DIN EN ISO 23856:2023-08) is current as published in August 2023. ISO 23856:2021 is the international document on which it is based; it replaces earlier ISO documents ISO 10467 and ISO 10639 and consolidates previous EN documents such as EN 1796 and EN 14364.

Q: Is it part of a series?

A: It is part of the family of standards for plastics piping and GRP systems and references related documents on design reliability and specific test/installation guidance (for example ISO 2394, ISO/TS 20656-1 and ISO 25780). It consolidates material previously split across multiple ISO/EN standards into a single harmonised document.

Q: What are the key keywords?

A: GRP, UP resin, vinyl-ester, plastics piping, water supply, drainage, sewerage, joints, DN 50–DN 4000, hydrostatic design.