TS 12664

TS 12664 is a service standard that sets out the general rules for workplaces converting motor vehicles to operate on LPG or CNG. Its focus is not the conversion kit alone, but the way the conversion service workplace is organised, equipped, and operated so that work on fuel systems is carried out in a controlled and consistent manner.

From a general technical perspective, LPG and CNG conversions involve adapting the vehicle’s fuel storage, filling connection, pressurised lines, pressure control components, injection hardware, and related electrical controls to suit an alternative fuel system. LPG is liquefied petroleum gas, while CNG is compressed natural gas; both require different storage and supply arrangements from conventional petrol or diesel systems. For that reason, workshop layout, equipment selection, installation practices, electrical safety, and final inspection are all central to the service context.

How the workplace rules fit the conversion process

The standard covers the general rules for workplaces that perform LPG/CNG conversions. In practical terms, this means the document is aimed at the service environment rather than at the detailed design of each vehicle component. The referenced standards point to a wider technical framework involving electrical installations, vehicle equipment, and gas-system related requirements, showing that this work depends on coordinated mechanical, electrical, and safety-related controls.

• Provides a general framework for workplaces offering LPG and CNG conversion services.
• Addresses how vehicle fuel-system modifications should be handled in a service setting.
• Sits within a broader technical context involving gas systems, electrical infrastructure, and vehicle-related requirements.
• Focuses on the workplace rules for the service provider rather than on a specific product type.