Ill. Admin. Code tit. 35, § 721.956 - Standards: Open-Ended Valves or Lines
a) Equipment.
1) Each open-ended valve or line must be
equipped with a cap, blind flange, plug, or a second valve.
2) The cap, blind flange, plug, or second
valve must seal the open end at all times except during operations requiring
hazardous secondary material stream flow through the open-ended valve or
line.
b) Each open-ended
valve or line equipped with a second valve must be operated in a manner such
that the valve on the hazardous secondary material stream end is closed before
the second valve is closed.
c) When
a double block and bleed system is being used, the bleed valve or line may
remain open during operations that require venting the line between the block
valves but must comply with subsection (a) at all other times.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.