NFPA 52, titled Vehicular Natural Gas Fuel Systems Code, is a comprehensive standard developed by the National Fire Protection Association (NFPA) to ensure the safety and reliability of compressed natural gas (CNG) and liquefied natural gas (LNG) systems in vehicles and fueling stations. The 2023 edition provides updated requirements for the design, installation, operation, and maintenance of these systems, aligning with current industry practices and technologies.