Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 661 - Hazardous Waste Identification And Listing
Subchapter BB - Air Emission Standards for Equipment Leaks
Section NR 661.1056 - Standards: open-ended valves or lines
Universal Citation: WI Admin Code ยง NR 661.1056
Current through August 26, 2024
(1)
(a) Each open-ended valve or line shall be
equipped with a cap, blind flange, plug, or a second valve.
(b) The cap, blind flange, plug, or second
valve shall seal the open end at all times except during operations requiring
hazardous secondary material stream flow through the open-ended valve or
line.
(2) Each open-ended valve or line equipped with a second valve shall be operated in a manner such that the valve on the hazardous secondary material stream end is closed before the second valve is closed.
(3) 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 shall comply with sub. (1) at all other times.
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