What material must be used for all uprights, braces, and corner posts in the fencing of CNG installations?

The requirement for using noncombustible materials for all uprights, braces, and corner posts in the fencing of CNG installations is essential for safety and regulatory compliance. Noncombustible materials are critical in minimizing fire hazards, particularly since compressed natural gas can pose significant risks in the event of a leak or fire.

Using noncombustible materials ensures that in the event of an incident involving fire, the integrity of the fencing remains intact, providing a reliable barrier that contains the area and prevents uncontrolled access. This is especially important around CNG installations, where safety regulations mandate that structures should be resilient to potential ignition and heat from surrounding fires.

The other materials listed, such as wood and plastic, pose risks as they can ignite easily and contribute to the spread of fire. Although aluminum is a noncombustible material, it may not provide the same structural stability or durability needed for security fencing in a CNG facility compared to other specified noncombustible materials that meet regulatory guidelines. Hence, the emphasis on noncombustible materials establishes a critical safety standard for the infrastructure surrounding CNG operations.