scope:

This International Standard specifies the requirements for the inspection of the cylinder installation and the requalification of high pressure cylinders, designed and manufactured in accordance with ISO 11439, for the on-board storage of natural gas as a fuel for automotive vehicles. The purpose of this International Standard is to provide guidance for the inspection of these cylinders in accordance with the manufacturer's recommendations, and to provide criteria for acceptance or rejection in the absence of guidance from the manufacturer, with subsequent disposition as necessary.