Method and device for measuring mechanical strength of a pressurized gas storage tank for a vehicle

A method for measuring mechanical strength of a pressurized gas storage tank for a vehicle, the method comprising:

• Providing a pressurized gas storage tank for a vehicle having at least one opening;
• Stretching an expandable element in a lengthwise direction;
• Introducing the expandable element into the pressurized gas storage tank for a vehicle via the opening;
• Connecting the expandable element to a pipe for a liquid;
• Filling the expandable element with a liquid;
• Exerting a pressure, Pint, on all interior walls of the pressurized gas storage tank for a vehicle by means of the expandable element filled with the liquid;
• Measuring a possible deformation of the pressurized gas storage tank for a vehicle;
• Emptying the liquid contained in the expandable element;
• and
• Removing the expandable element from the pressurized gas storage tank for a vehicle via the opening.