5305.6 Upright use.
FC § 5305.6
Compressed gas containers, except those designed for use in a horizontal position, and all compressed gas containers containing nonliquefied gases, shall be used in an upright position with the valve end up. The axis of a container being used in an upright position may be inclined as much as 45 degrees (0.80 rad) from the vertical provided that it is properly secured. Use of nonflammable liquefied gases in the inverted position when the compressed gas is in the liquid state shall be allowed provided that the container is properly secured and the dispensing apparatus is designed for such liquefied gas use. Exception: Compressed gas containers with an internal volume less than 0.174 ft 3 (0.005 m3) may be used in a horizontal position.
