Reactive fluxing
Reactive fluxing means the use of any gas, liquid, or solid flux (other than cover flux) that results in a HAP emission. Argon and nitrogen are not reactive and do not produce HAP.
Source
40 CFR § 63.1503
Scoping language
Terms used in this subpart are defined in the Clean Air Act as amended (CAA), in 63.2, or in this section as follows: