Closed system for flushing fixed lines

Closed system for flushing fixed lines means a system in which the line to be flushed is disconnected from its original position and connected to two closed containers, one that contains cleaning solvent and one that is empty. Solvent is flushed from the container with cleaning solvent, through the line, and into the empty containers.

Source

40 CFR § 63.702

Scoping language

All terms used in this subpart that are not defined below have the meaning given to them in the Clean Air Act and in subpart A of this part.