TS 12664-2/T1

TS 12664-2/T1 is a workplace standard for places that convert road vehicle fuel systems for operation with compressed natural gas (CNG) and liquefied natural gas (LNG). It sets out a general framework for the structural characteristics, operating arrangements, personnel-related conditions, and technical equipment needed to carry out conversion work in an organized and controlled way.

Core areas covered in conversion workplaces

Vehicle conversion shops need careful control because modifications to the fuel system affect vehicle performance, refuelling arrangements, and overall operating safety. CNG and LNG are both natural-gas-based fuels, but they differ in storage form, pressure behavior, and equipment selection. For that reason, the physical layout of the workplace and the tools and devices used there need to be compatible with the type of work being performed.

• Structural characteristics: suitability of the physical facility and work areas
• Operating arrangements: how the activity is organized and managed
• Personnel: the general framework for staff conditions and competence
• Technical equipment: tools, devices, and hardware used in the conversion process

General technical context

The purpose of this kind of standard is to define common rules for a conversion workplace so that work on gas-powered vehicle conversions can be carried out in a repeatable and inspectable manner. The TSE document focuses on the workplace itself; it does not describe every detail of vehicle design, but rather the general principles for the environment in which the activity takes place and the supporting elements around it. This creates a consistent technical basis for the relationship between workplace layout, personnel arrangements, and equipment selection.

The referenced framework also connects with legislation on workplace opening and operation, as well as regulations concerning vehicle modification and assembly. In that sense, the standard is not only a technical reference but also a practical guide to the organizational and operational setting of businesses that provide conversion services.