What is ISO 8789 about?
ISO 8789 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.
Who is ISO 8789 for?
ISO 8789 on rubber hoses for LPG vehicles is useful for:
- Automobile manufacturers
- Automobile engineers
- Quality control personnel
- Maintenance personnel
Why should you use ISO 8789?
Rubber hoses for LPG vehicles are used to connect the gas tank to the engine. If these components have any defects after installation, it can affect the vehicles fuel efficiency and even compromise the safety of the passengers.
ISO 8789 provides you with a detailed account of the materials suited for the construction of these hoses. ISO 8789 also provides the dimensions for hoses so there are no inaccuracies in the production stages. ISO 8789 ensures that rubber hoses and hose assemblies meet all the necessary requirements before installation in LPG powered vehicles.
What’s changed since the last update?
BS ISO 8789:2020 replaces ISO 8789:2018, which has been technically revised. The main changes in BS ISO 8789:2020 compared to ISO 8789:2018 are as follows:
- In Table 2, "70 ± 1" for both lining and cover has been changed to "80 ± 1"
- In 8.2, “45° cone” has been changed to “45° flare"
- Clause 10 has been upgraded to the latest agreed-upon verbiage
- 11.1 and 11.2 have been upgraded to the latest agreed-upon verbiage
- Annexes A and B have been upgraded to the latest agreed-upon verbiage