What is the maximum size, in standard cubic feet (SCF), for portable CNG containers to be stored and used indoors or on the roof in specific occupancies?

The maximum size for portable compressed natural gas (CNG) containers that can be stored and used indoors, as well as on rooftops in specified types of occupancies, is 8.7 standard cubic feet (SCF). This limit is put in place to mitigate safety risks associated with the storage and use of CNG, which is highly flammable and can pose significant hazards if not managed properly. By adhering to this limitation, fire safety protocols are maintained to ensure the protection of occupants and property, as excessive quantities of CNG could lead to dangerous conditions in the event of a leak or fire. Understanding these regulations is crucial for fire guards and personnel responsible for torch operations, as it informs their practices and helps them ensure compliance with safety standards.