Hose conveying propane liquid and/or vapor at pressures greater than 5 PSIG should be designed for what minimum bursting pressure?

The correct choice establishes that hoses used to convey propane liquid and/or vapor at pressures greater than 5 PSIG should have a minimum bursting pressure of 150 PSIG. This requirement ensures that the hoses can safely handle pressures that significantly exceed their operating range, thus providing a safety margin to prevent failures that could lead to leaks or catastrophic events.

The minimum bursting pressure is critical in the context of propane distribution, as it guarantees that the hoses are built to withstand not just normal working pressures, but also potential pressure surges that can occur during system operation. Propane, being flammable, necessitates stringent safety measures to protect both personnel and property.

The other options provided are less suitable for this requirement. Documented values every 5 or 10 feet do not pertain to the specific minimum bursting pressure necessary for hoses under such conditions. Similarly, an average pressure of 20 PSIG does not account for the potential maximum pressures that could be encountered, thus failing to meet safety standards for high-pressure applications. Overall, recognizing and adhering to the specified minimum bursting pressure is crucial in maintaining safety and integrity in propane handling systems.