ISO 4427-3-2019 PDF

Full title and description

Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 3: Fittings. This international standard specifies requirements and test parameters for polyethylene (PE) fittings intended for buried or above-ground use in potable water, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems and other water applications.

Abstract

ISO 4427-3:2019 defines the scope, types and performance requirements for PE fittings (including fusion fittings — electrofusion, spigot and socket — mechanical fittings such as compression and flanged types, and fabricated fittings). It specifies test parameters for referenced test methods and covers use conditions up to a maximum allowable operating pressure (PFA) of 25 bar with a 20 °C reference temperature; guidance for other temperatures is given in ISO 4427-1. The document also gives requirements concerning colours and marking where relevant.

General information

• Status: Published.
• Publication date: 2019 (edition 2 — July 2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 93.025; 23.040.45; 91.140.60.
• Edition / version: Edition 2 (2019).
• Number of pages: 35 pages (ISO edition).

Scope

Specifies fittings made from polyethylene (PE) for buried or above-ground applications intended for the conveyance of potable water, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems and other water uses. The standard applies to fittings used alone or joined to pipes and components manufactured from PE or other materials, and sets out test parameters and performance requirements for normal and some extreme conditions (noting manufacturer responsibility for appropriate selections). It is intended for system components operating up to PFA 25 bar at a 20 °C reference temperature.

Key topics and requirements

• Types of fittings covered: fusion fittings (electrofusion, spigot for butt/electrofusion socket, socket fusion), mechanical fittings (compression, flanged) and fabricated fittings.
• Performance limits: applicability up to a maximum allowable operating pressure (PFA) of 25 bar with a 20 °C reference temperature; guidance for other temperatures in ISO 4427-1.
• Specified test parameters and referenced test methods for verification of mechanical, dimensional and physical properties.
• Requirements on colours, marking and traceability to help identify suitability for potable water and other service types.
• Guidance on joint compatibility (PE-to-PE fusion joints and joints with other materials) and responsibilities for purchaser/specifier choices.

Typical use and users

Used by water utilities, municipal engineers, pipeline designers, PE fittings manufacturers and fabricators, test laboratories, procurement/specification teams, consulting engineers and contractors who design, manufacture, supply, install or verify PE pipeline fittings for potable water, raw water, drainage and pressure sewer applications. The standard is typically referenced in procurement specifications, product type-approval and conformity testing.

Related standards

ISO 4427 is a multi-part series. Closely related parts include: ISO 4427-1 (General and performance requirements), ISO 4427-2 (Pipes), ISO 4427-5 (Fitness for purpose of the system). Other parts in the series address valves and design coefficients (Part 4 and Part 6) as published or adopted in the series. For material designation and the method for calculating design stress the related ISO standard ISO 12162 is commonly applied.

Keywords

ISO 4427, polyethylene, PE fittings, electrofusion, butt fusion, compression fittings, flanged fittings, potable water, pressure piping, PFA, MRS, SDR, design coefficient, testing, marking, traceability.

FAQ

Q: What is this standard?

A: ISO 4427-3:2019 is the international standard that specifies requirements and test parameters for polyethylene (PE) fittings used in water supply and pressure drainage/sewerage systems.

Q: What does it cover?

A: It covers types of PE fittings (fusion, mechanical and fabricated), performance limits and test parameters for fittings intended for buried or above-ground conveyance of potable and other water types, including conditions up to 25 bar (reference 20 °C). It also sets expectations for colours, marking and joint compatibility.

Q: Who typically uses it?

A: Manufacturers, test laboratories, utilities, designers, specifiers, contractors and procurement teams involved in PE water and pressure sewer systems.

Q: Is it current or superseded?

A: ISO 4427-3:2019 (Edition 2) is the current published edition that superseded ISO 4427-3:2007. The ISO record shows the 2019 edition as published and under periodic review.

Q: Is it part of a series?

A: Yes — ISO 4427 is a multipart series covering polyethylene piping systems for water and pressure drainage/sewerage; related parts include ISO 4427-1 (general), ISO 4427-2 (pipes), ISO 4427-4 (valves), ISO 4427-5 (fitness for purpose) and ISO 4427-6 (design coefficient) among others.

Q: What are the key keywords?

A: Polyethylene (PE), fittings, electrofusion, butt/ socket fusion, compression fittings, flanged fittings, potable water, pressure rating (PFA/PN), MRS, SDR, ISO 4427.