How far must ducts conveying explosive or flammable vapors be located from property lines?

Ducts that convey explosive or flammable vapors must be situated at least 30 feet away from property lines to ensure safety and minimize the risk of fire or explosion. This distance is established as a precautionary measure to prevent the potential spread of hazardous materials. Keeping the ducts at this specified distance helps to protect nearby structures and individuals from accidental ignition of flammable vapors that could escape from the duct system. The regulation reflects a commitment to safe practices in mechanical design and installation, emphasizing the importance of separating potential sources of danger from areas where people live or work. It's essential to adhere to such guidelines to enhance overall safety in mechanical systems.