Why are CNG cylinders specifically required to be labeled with the words “For CNG only”?

The labeling of CNG cylinders with the words “For CNG only” serves a critical safety purpose by ensuring correct usage. This specific labeling helps prevent confusion among users about the contents of the cylinder, reducing the risk of improper connections or use with incompatible fuels. Such clarity is vital because using a CNG cylinder for non-approved gases could lead to hazardous situations, including leaks, explosions, or equipment failure. Ensuring that all personnel handling or utilizing the cylinders are aware that they are intended specifically for compressed natural gas reinforces safe practices and minimizes the potential for accidents. This approach is essential in maintaining safety protocols within the industry and ensuring compliance with regulations designed to protect both people and the environment.