ISO 4437-2:2024
Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 2: Pipes
Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 2: Pipes
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 23
- Дата публикации:
- 14 февраля 2024 г.
- Издание:
- ISO IS 4437 edition 2 version 1
- ICS:
- 75.200
This document specifies the characteristics of pipes made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods referred to in this document. In conjunction with ISO 4437-1, ISO 4437-3, ISO 4437-4 and ISO 4437-5, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure (MOP), up to and including 10 bar[1], at a reference temperature of 20 °C for design purposes; b) an operating temperature between −20 °C and 40 °C. For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in ISO 4437-5. The ISO 4437 series covers a range of MOPs and gives requirements concerning colours. This document is applicable to three types of pipes: — PE pipes (outside diameter, dn) including any identification stripes; — PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter, dn) as specified in Annex A, where all PE layers have the same MRS rating; — PE pipes (outside diameter, dn) with a peelable and contiguous thermoplastics additional layer on the outside of the pipe ("coated pipe") as specified in Annex B. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Abstract
Overview
ISO 4437-2:2024 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes specifies the characteristics and test parameters for polyethylene (PE) pipes used in the distribution of gaseous fuels. The standard applies to PE pipes, including co‑extruded and coated types, intended for systems with a maximum operating pressure (MOP) up to and including 10 bar (reference temperature 20 °C) and operating temperatures between −20 °C and 40 °C. It is part of the ISO 4437 series and must be used together with the companion parts covering materials, fittings, valves and system fitness-for-purpose.
Key technical topics and requirements
- Scope and operating conditions
- MOP up to 10 bar at 20 °C; operating temperature range −20 °C to 40 °C. Derating coefficients for 20–40 °C are referenced in ISO 4437-5.
- Types of PE pipes covered
- Standard PE pipes (with identification stripes)
- Pipes with co‑extruded layers (Annex A) where all PE layers share the same MRS rating
- Coated pipes with a peelable thermoplastic external layer (Annex B)
- Material and performance
- Requirements for PE compounds, identification-stripe compounds and permissible recycled material
- Inclusion of PE 100-RC (resistance to slow crack growth) materials and updated test methods for these materials
- Geometrical and mechanical requirements
- Mean outside diameter, wall thickness minima and tolerances, out‑of‑roundness, ring stiffness, tensile properties
- Conditioning, mechanical and physical test parameters (e.g., long‑term pressure resistance, RCP and slow crack growth tests)
- Additional provisions
- Marking requirements, squeeze‑off technique (Annex C), and maximum nominal outside diameter extended up to 800 mm
- Purchaser/specifier responsibility
- Selection of pipe type, dimensions and material options must consider national regulations, installation practice and system requirements
Practical applications
- Design, manufacture, testing and procurement of PE gas distribution pipelines
- Low- and medium-pressure gas mains and service lines for natural gas, biomethane and other gaseous fuels
- Quality control and compliance verification for pipe suppliers and test laboratories
Who should use this standard
- Gas utility engineers and network designers
- Pipe manufacturers and compound formulators
- Installers, contractors and inspection bodies
- Regulatory authorities and procurement/specification teams
Related standards
- ISO 4437 series: ISO 4437-1, -3, -4, -5 (system materials, fittings, valves, fitness for purpose)
- Test and material standards referenced: ISO 1167, ISO 13477/13478/13479, ISO 11922-1, ISO 6259, ISO 18488/18489
This standard is essential for ensuring safe, durable and compliant PE piping systems for gaseous fuel distribution.
Технические детали
- Технический комитет
- ISO/TC 138/SC 4 - Plastics pipes and fittings for the supply of gaseous fuels
- SKU
- ISO 4437-2:2024
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