ISO 8789:2020 PDF

Name: ISO 8789:2020 — Rubber hoses and hose assemblies for liquefied petroleum gas in motor vehicles — Specification
SKU: ISO 8789:2020
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Rubber hoses and hose assemblies for liquefied petroleum gas in motor vehicles — Specification

Название (английский):

ISO 8789:2020

Rubber hoses and hose assemblies for liquefied petroleum gas in motor vehicles — Specification

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 8 января 2020 г.
Издание:: ISO IS 8789 edition 4 version 1
ICS:: 43.060.40

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Язык документа:

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Описание (английский):

This document specifies the requirements for rubber hoses and hose assemblies, up to a maximum hose size of 19, for use in motor vehicles with liquefied petroleum gas (LPG) installations. The hoses are designed for use up to a maximum working pressure of 3,0 MPa (30 bar) and at working temperatures from −40 °C up to and including +80 °C.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 8789:2020 specifies requirements for rubber hoses and hose assemblies for liquefied petroleum gas (LPG) in motor vehicles. Applicable to hoses up to a maximum size of 19, the standard covers construction, materials, dimensions, physical properties and performance testing for LPG (propane) service. It is the 2020 (fourth) edition and harmonizes international requirements for vehicle LPG systems (for example, United Nations Regulation No. 67).

Key facts:

Maximum working pressure: 3.0 MPa (30 bar)

Operating temperature range: −40 °C to +80 °C

Maximum hose size: 19

Key topics and technical requirements

ISO 8789:2020 defines both material and performance criteria, including:

Materials & construction: smooth-bore LPG-resistant rubber liner, reinforcement (textile or corrosion-resistant wire), and oil/weather-resistant rubber cover (cover omitted if wire-reinforced). Covers must be pin‑pricked to reduce gas‑permeation bubble formation.

Dimensions & tolerances: inside diameter and minimum bending radii for each hose size; concentricity requirements (≤ 1.0 mm).

Physical properties of compounds: minimum tensile strength (≥ 10 MPa) and elongation at break (≥ 250%) for lining and cover, plus resistance to ageing and solvent (n‑pentane) effects.

Performance tests: proof pressure (7.5 MPa / 75 bar hold), minimum burst pressure (15.0 MPa / 150 bar), adhesion, low‑temperature flexibility (−40 °C), ozone resistance and permeability to propane (tested per ISO 4080).

Fittings: stainless steel, brass or plated ferrous materials; crimp‑on or reusable screw‑together types. Swivel nuts use UNF or metric threads and sealing is preferably by a 45° flare.

Hose assembly tests: underwater leakage at 3.0 MPa, burst/proof tests and permeability checks; marking and test frequency requirements are specified.

Applications and users

ISO 8789:2020 is essential for:

Hose and hose‑assembly manufacturers designing and producing LPG fuel lines for vehicles

Automotive OEMs specifying supplier components for factory‑fitted LPG systems

Aftermarket suppliers and installers of LPG conversions and repair kits

Test laboratories and certification bodies performing type and production tests in accordance with international regulations

Regulatory authorities and compliance engineers referencing harmonized safety criteria (e.g., UN R67)

Related standards

Normative references include ISO test methods and related standards such as:

ISO 8789:2020 helps ensure safety, durability and regulatory compliance for LPG fuel lines in motor vehicles by specifying materials, dimensions and rigorous performance testing.

ISO 8789:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

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