TS 12664-2/T2

TS 12664-2/T2 is a standard for workplaces where road vehicles are converted to operate with compressed natural gas (CNG) and liquified natural gas (LNG). Its focus is the framework needed to carry out conversion work in an orderly and controlled way, especially the workplace structure, operating conditions, personnel arrangements, and technical equipment.

Technical and operational framework for conversion workplaces

A vehicle fuel-system conversion shop is not the same as a general repair garage. CNG systems involve gas stored under high pressure, while LNG involves natural gas in liquid form at very low temperature. That difference affects how the workspace is laid out, what equipment is used, how work is organized, and what kind of staff arrangements are needed. The scope of this standard is directed at the structural, operating, personnel, and technical equipment conditions of such workplaces, so it defines the basic environment in which the conversion activity takes place.

General context of CNG and LNG conversions

CNG and LNG are two common ways of making natural gas usable as a vehicle fuel. CNG is typically stored at high pressure, whereas LNG is kept in liquid form at cryogenic temperatures. This distinction explains why tanks, fittings, ventilation, service procedures, and workplace conditions matter so much in conversion facilities. The title and scope link CNG and LNG conversion work together, although the supplied scope text explicitly emphasizes CNG-based conversion.

• Applies to workplaces that convert road vehicles for natural-gas-based use.
• Covers structural characteristics of the workplace.
• Addresses operating and organizational rules.
• Includes personnel and technical equipment conditions.
• Places CNG and LNG conversion in the same workplace context.