40 CFR 61.242-6 - Standards: Open-ended valves or lines.

§ 61.242-6 Standards: Open-ended valves or lines.


(1) Each open-ended valve or line shall be equipped with a cap, blind flange, plug, or a second valve, except as provided in § 61.242-1(c).

(2) The cap, blind flange, plug, or second valve shall seal the open end at all times except during operations requiring process fluid 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 process fluid 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) at all other times.

(d) Open-ended valves or lines in an emergency shutdown system which are designed to open automatically in the event of a process upset are exempt from the requirements of paragraphs (a), (b) and (c) of this section.

(e) Open-ended valves or lines containing materials which would autocatalytically polymerize or would present an explosion, serious overpressure, or other safety hazard if capped or equipped with a double block and bleed system as specified in paragraphs (a) through (c) of this section are exempt from the requirements of paragraphs (a) through (c) of this section.

[ 49 FR 23513, June 6, 1984, as amended at 65 FR 78282, Dec. 14, 2000]

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United States Code

Title 40 published on 19-May-2018 05:22

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 61 after this date.

  • 2018-04-13; vol. 83 # 72 - Friday, April 13, 2018
    1. 83 FR 15964 - New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to New Mexico
      GPO FDSys XML | Text
      Direct final rule; delegation of authority.
      This rule is effective on June 12, 2018 without further notice, unless the EPA receives relevant adverse comment by May 14, 2018. If the EPA receives such comment, the EPA will publish a timely withdrawal in the Federal Register informing the public that the updated NESHAP delegation will not take effect; however, the NSPS delegation will not be affected by such action.
      40 CFR Parts 60, 61, and 63