TS 12664-2

TS 12664-2 is a service standard that sets general rules for places carrying out the conversion of road-vehicle fuel systems to operate on compressed natural gas (CNG). It focuses on the operating organization, physical characteristics, technical equipment, staff qualifications, and certification framework of such conversion facilities.

What a CNG conversion workshop needs to address

In technical terms, a CNG conversion is more than replacing one fuel source with another. A road vehicle running on CNG depends on coordinated components such as high-pressure storage, pressure reduction, valves, piping, and secure connections. For that reason, the workshop environment matters as much as the parts installed on the vehicle. General engineering practice in this field emphasizes controlled work conditions, suitable tools and test capability, and personnel who can perform the work consistently and responsibly.

General scope covered by the standard

• management and organization of the workplace
• structural characteristics of the facility
• required technical equipment
• staff qualifications and competence
• general rules for certification

The referenced documents include standards and regulations related to vehicle modification, workplace licensing, natural gas systems, and associated equipment. This places the document in the broader context of CNG retrofitting as a specialized automotive service activity where workshop conditions, equipment, and personnel capability must be considered together. TS 12664-2 is marked as a withdrawn standard, so this record reflects the technical framework used in its period of application.