TS 12664-1

TS 12664-1 sets out the general rules for places that convert road-vehicle fuel systems to operate on liquefied petroleum gas (LPG). The document treats LPG conversion as more than a fitting task: it frames the service site as a technical workplace whose physical layout, equipment, operating arrangement, and staff qualifications all matter together.

What LPG conversion means in practice

LPG conversion is the adaptation of a vehicle’s fuel system, typically from a conventional petrol-based setup, so it can use LPG safely and effectively. In automotive use, issues such as fuel storage, filling connections, pressure regulation, piping, protective devices, and on-vehicle placement are central. This standard focuses on the general conditions of the service provider’s workplace rather than the detailed conversion procedure itself, so it addresses the framework for the service rather than the complete engineering of each conversion job.

The service conditions covered by the standard

• Business operation and service organisation
• Physical characteristics of the premises and suitability of the work area
• Technical equipment needed for conversion work
• Qualifications and competence of personnel
• General conditions for orderly and safe LPG conversion services

The document sits alongside consumer protection rules, workplace opening and operating licence provisions, and regulations on the manufacture, modification, and assembly of vehicles. In practical terms, standards like this help create a common baseline for service sites carrying out LPG conversions, while the exact technical solution still depends on vehicle type, equipment selection, and the wider regulatory framework.

From a general technical perspective, LPG is a gaseous hydrocarbon fuel used in vehicles as an alternative energy source. Automotive LPG systems require dedicated components to store the fuel securely and deliver it in a controlled way. That is why a conversion service site must be judged not only by workshop skill, but also by equipment suitability, operational discipline, and personnel competence.