Hydrogen system
Hydrogen system means all vessels, piping, and equipment that convey a by-product hydrogen stream. The hydrogen system begins at the decomposer and ends at the point just downstream of the last control device. The hydrogen system includes all control devices.
Source
40 CFR § 63.8266
Scoping language
Terms used in this subpart are defined in the CAA, in 63.2, and in this section as follows: