Where should CNG storage cylinders that are charged and not connected be located?

CNG storage cylinders that are charged and not connected should be located outdoors in a fenced area for safety and environmental reasons. This location reduces the risk of potential hazards that may arise from leaks or accidents associated with pressurized gas. Outdoor storage helps ensure that any gas that might escape can disperse safely into the atmosphere rather than accumulate in an enclosed space, which could pose serious risks, including explosion or fire.

Securing the area with fencing adds an additional layer of safety and security, preventing unauthorized access and minimizing risks associated with tampering or accidents. Additionally, placing CNG cylinders outdoors allows for proper ventilation, which is crucial when dealing with highly pressurized gasses.

Indoor storage is not advisable for charged cylinders since it poses greater risks in case of a leak, as gas could accumulate. Storing them on a trailer or in an unmonitored location does not provide the security and safety measures that are necessary for storing pressurized gas cylinders. Therefore, the choice of placing CNG storage cylinders outdoors in a fenced area aligns with best practices for safety and regulatory compliance.