Fuel gas system
Fuel gas system means the offsite and onsite piping and flow and pressure control system that gathers gaseous stream generated by onsite operations, may blend them with other sources of gas, and transports the gaseous stream for use as a fuel gas in combustion equipment, such as furnaces and gas turbines, either singly or in combination.
Source
40 CFR § 63.1001
Scoping language
All terms used in this part shall have the meaning given them in the Act and in this section.