5303.1.2 Pressure relief devices.

Pressure relief devices shall be designed in compliance with the requirements of FC 5303.1.2.1 through 5303.1.2.4.

5303.1.2.1 Where required.

Containers and tanks for compressed gas storage shall be provided with pressure relief devices designed in accordance with CGA S-1.1, CGA S-1.2, CGA S-1.3, or Section VIII of the ASME Boiler and Pressure Vessel Code, as applicable, to protect such containers and tanks from rupture in the event of overpressure.

5303.1.2.2 Size.

Pressure relief devices shall be sized in accordance with the specifications to which the container was fabricated and to material-specific requirements, as applicable.

5303.1.2.3 Arrangement.

Pressure relief devices shall be arranged to discharge upward and unobstructed to the open air in such a manner as to prevent any impingement of escaping gas upon the container, adjacent structures or personnel.

   Exception: DOTn specification containers having an internal volume of 30 SCF (0.855 m 3) or less.

5303.1.2.4 Protection against freezing.

Pressure relief devices shall be designed and installed to prevent moisture from collecting and freezing in a manner that would impair the operation of the device.

5303.2 Marking.

Stationary and portable compressed gas containers and systems shall be marked in compliance with the requirements of FC 5303.2.1 through 5303.2.4.

5303.2.1 Stationary compressed gas containers.

Stationary compressed gas containers shall be marked with the name of the gas in accordance with FC 5003.5 and 5003.6. Markings shall be visible from any direction of approach. All uninsulated stationary outdoor compressed gas containers shall be of light-reflective design or painted with a light-reflecting color.