ISO 4427-3:2019
Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 3: Fittings
Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 3: Fittings
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 35
- Дата публикации:
- 6 августа 2019 г.
- Издание:
- ISO IS 4427 edition 2 version 1
- ICS:
- 23.040.45
This document specifies the fittings made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes. NOTE 1 The intended uses include sea outfalls, laid in water and connection between pipes suspended below bridges. This document also specifies the test parameters for the test methods referred to in this document. In conjunction with the other parts of the ISO 4427 series, this document is applicable to PE fittings, to joints with components of PE or other materials, intended to be used under the following conditions: a) a maximum allowable operating pressure (PFA) up to and including 25 bar[1]; b) an operating temperature of 20 °C as the reference temperature. NOTE 2 For other operating temperatures, guidance is given in ISO 4427‑1:2019, Annex A. This document covers a range of maximum allowable operating pressures and gives requirements concerning colours. NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and installation practices or codes. This document is applicable to fittings of the following types: 1. fusion fittings; a. electrofusion fittings; b. spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion); c. socket fusion fittings (see Annex A); 2. mechanical fittings; a. compression fittings; b. flanged fittings; 3. fabricated fittings (see Annex B). [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Abstract
Overview
ISO 4427-3:2019 specifies requirements for polyethylene (PE) fittings used in plastics piping systems for water supply, and for drainage and sewerage under pressure. The standard covers PE fittings for buried or above-ground installations conveying potable water, raw water prior to treatment, pressurised drainage and sewerage, vacuum sewer systems and other water uses - including sea outfalls, submerged runs and pipe connections suspended beneath bridges. It applies to fusion, mechanical and fabricated fittings intended for service at a reference temperature of 20 °C and a maximum allowable operating pressure (PFA) up to 25 bar.
Key topics and technical requirements
- Scope and intended use: Buried/above-ground water conveyance, including special installations (sea outfalls, submerged, suspended).
- Types of fittings covered:
- Fusion fittings (electrofusion, spigot end for butt/electrofusion, socket fusion)
- Mechanical fittings (compression, flanged)
- Fabricated fittings (Annex B)
- Materials: Requirements for PE compounds and non-PE components (metals, elastomers, other materials).
- Geometrical characteristics: Dimensional tolerances, socket/spigot dimensions, wall thicknesses and out‑of‑roundness limits.
- Mechanical & physical properties: Conditioning, performance and retest requirements for pressure resistance, tensile behaviour of assemblies and short‑term pressure testing (see Annexes D and E).
- Electrical characteristics: Requirements specific to electrofusion fittings and their fusion systems.
- Chemical resistance & water quality: Tests and limits for long‑term contact with chemicals and potential effects on water intended for human consumption.
- Marking and packaging: Minimum marking requirements, fusion system recognition and packaging rules to ensure traceability and correct installation.
- Test methods and annexes: Normative and informative annexes provide socket fusion details (Annex A), fabricated fitting guidance (Annex B), connection examples (Annex C) and test methods.
Applications and practical value
- Ensures compatibility and safety of PE fittings in municipal water distribution, wastewater pressure lines, industrial water systems and marine outfalls.
- Used by pipelines designers, manufacturers, utilities, contractors and regulatory bodies to specify, procure and verify PE fittings that meet international performance and testing requirements.
- Facilitates consistent installation practice, quality control, conformity assessment and interchangeability among suppliers.
Who should use this standard
- Civil and pipeline engineers, specification writers, procurement teams, manufacturers of PE fittings and fusion equipment, testing laboratories, and water utility compliance officers.
Related standards
- Other parts of the ISO 4427 series (refer to ISO 4427-1:2019 for temperature guidance).
- Normative references cited in ISO 4427-3:2019 include standards such as ISO 1133-1 (MFR/MVR testing) and ISO 1167-1 (resistance to internal pressure tests), among others.
Технические детали
- Технический комитет
- ISO/TC 138/SC 2 - Plastics pipes and fittings for water supplies
- SKU
- ISO 4427-3:2019
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ISO 4427-1:2019
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