Double block and bleed system

Double block and bleed system means two block valves connected in series with a bleed valve or line that can vent the line between the two block valves.

Source

40 CFR § 63.1251

Scoping language

Terms used in this subpart are defined in the Act, in subpart A of this part, or in this section. If the same term is defined in subpart A of this part and in this section, it shall have the meaning given in this section for the purposes of this subpart.