ISO 4427-2-2019 PDF

Full title and description

ISO 4427-2:2019 — Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 2: Pipes. This part of ISO 4427 specifies requirements for PE pipes intended for the conveyance of potable water, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems and other water conveyance uses; it covers plain PE pipes, co‑extruded PE pipes and PE pipes with a peelable outer layer and includes relevant test parameters.

Abstract

This International Standard defines geometrical, mechanical and performance requirements for polyethylene (PE) pipes used in buried or above‑ground installations for water supply and pressurized sewerage systems. It provides specification of pipe types, nominal pressure/SDR relationships, colour requirements for different uses, applicable test parameters and installation-related notes; reference guidance for other operating temperatures is given in ISO 4427‑1:2019.

General information

• Status: Published
• Publication date: August 2019
• Publisher: ISO (International Organization for Standardization)
• ICS / categories: 23.040.20 (Plastics pipes); 93.025 (External water conveyance systems); 91.140.60 (Water supply systems)
• Edition / version: Edition 2 (2019)
• Number of pages: 20

Amendment 1 to ISO 4427‑2:2019 was published in 2023 to update/clarify specific points in the 2019 text.

Scope

Specifies requirements for PE pipes (including co‑extruded and peelable‑layer types) intended for conveyance of water for human consumption (and raw water before treatment), drainage and sewerage under pressure, vacuum sewer systems and other water uses. Applicable for designs with maximum allowable operating pressure up to 25 bar at a reference temperature of 20 °C (with guidance for other temperatures referenced in ISO 4427‑1). It also sets out colour coding, dimensional tolerances, wall thickness/SDR relationships and referenced test parameters.

Key topics and requirements

• Definition of applicable pipe types: plain PE pipes, co‑extruded PE pipes and PE pipes with peelable outer layers.
• Dimensional requirements and tolerances (mean outside diameter, wall thickness, ovality) and measurement conditions.
• Nominal pressure (PN) / SDR / MRS relations for PE grades (PE 40, PE 80, PE 100) and corresponding allowable operating pressures up to 25 bar at 20 °C.
• Material, colouring and marking requirements (colour codes for potable water vs. drainage/sewerage and protection guidance for above‑ground installations).
• Referenced test parameters and acceptance criteria for mechanical and long‑term performance (e.g., hydrostatic strength, dimensional checks, resistance criteria).

These topics reflect the standard's test and specification clauses and common industry implementations for PE water pipes.

Typical use and users

Used by utilities, waterworks engineers, pipeline designers, municipal procurement/specifiers, pipe manufacturers, testing laboratories and contractors involved in water supply, pressurized sewerage and vacuum sewer systems. Typical applications include buried distribution mains, raw water conveyance, sea outfalls, above‑ground runs (with UV/protection considerations) and infrastructure projects requiring standardized PE piping.

Related standards

Part of the ISO 4427 series. Closely related documents include ISO 4427‑1 (general requirements and guidance for use at other temperatures), other parts addressing fittings, joints and fitness for purpose (e.g., ISO 4427‑5), plus national standards and complementary ISO test methods referenced in the normative references. ICS groupings and related plastics‑pipe standards are listed under 23.040.20.

Keywords

PE pipes, polyethylene, water supply, pressurized sewerage, vacuum sewer, SDR, PN, MRS, pipe dimensions, ISO 4427, piping standard, potable water, co‑extruded pipe, peelable layer.

FAQ

Q: What is this standard?

A: ISO 4427‑2:2019 is the International Standard that specifies requirements for polyethylene (PE) pipes used in water supply and pressurized sewerage applications (pipes only — Part 2 of the ISO 4427 series).

Q: What does it cover?

A: It covers pipe types (plain, co‑extruded, peelable‑layer), dimensional and material requirements, nominal pressure/SDR relationships, colour/marking guidance, and test parameters for acceptance and performance at the reference temperature (20 °C).

Q: Who typically uses it?

A: Pipe manufacturers, specification engineers, water utilities, contractors, procurement teams and testing laboratories engaged in design, manufacture, selection and verification of PE piping systems for potable water and pressurized sewerage.

Q: Is it current or superseded?

A: The 2019 edition (Edition 2) is the current published edition; an amendment (ISO 4427‑2:2019/Amd 1) was published in 2023 to update the text. Previous editions (for example the 2007 edition) were withdrawn and replaced by the 2019 edition.

Q: Is it part of a series?

A: Yes — ISO 4427 is a multi‑part series covering PE piping systems for water supply and related applications; Part 1 provides general requirements/guidance, other parts cover fittings, joints and fitness‑for‑purpose aspects.

Q: What are the key keywords?

A: PE, polyethylene, water supply, sewerage under pressure, SDR, PN, MRS, piping dimensions, co‑extruded, peelable layer, ISO 4427.