40 CFR 261.1056
§ 261.1056 Standards: Open-ended valves or lines.
United States · 40 CFR — Protection of Environment · Status: effective
Cite this
- Citation
- 40 CFR 261.1056, § 261.1056 Standards: Open-ended valves or lines, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/185388
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Full text
(a)(1) Each open-ended valve or line shall be equipped with a cap, blind flange, plug, or a second valve.
(2) 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.
(b) 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.
(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 shall comply with paragraph (a) of this section at all other times.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.