Double block and bleed definition

Double block and bleed means the closure of a line, duct, or pipe by closing and locking or tagging two in-line valves and by opening and locking or tagging a drain or vent valve in the line between the two closed valves.
Double block and bleed means the closure of a line, duct or pipe by locking and tagging a drain or vent which is open to the atmosphere in the line between two locked-closed valves.
Double block and bleed means the closure of adjacent piping by locking out a drain or vent in the open position in the line between 2 locked out valves in the closed position;

Examples of Double block and bleed in a sentence

  • 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.

  • Double block and bleed valves ensure that there is no possibility of gas entering the engine room when the system is shut down.All the gas processing equipment up to the Slam shut valve is located within the cold box and therefore the possibility of mechanical damage is unlikely.

  • Double block and bleed isolating valves in the cargo piping system allow for simultaneous loading or discharging of different grades.

  • Double block and bleed valves are required for relief valves that would require an entire plant outage to service.

  • The diagnosis may have been made prior to the workplace injury or at any time after the workplace accident, based on pre-injury or post-injury clinical information.

  • Blinding should take place at the flange closest to the confined space.• Removing a valve, spool piece or expansion joint as close as possible to the permit space and placing a blank or cap on the open ends.• Double block and bleed by shutting a least two valves in piping leading to the permit space, opening a bleed off path to atmosphere between the shut valves, and/or locking/tagging these valves.

  • Double block and bleed valves shall be provided upstream and downstream of each meter run to allow switching from one run to another without compromising measurement performance and to ensure no gas bypasses the intended meter runs.

  • N2InjectionPressure relief valveVent and N2 purge Double block and bleed Diagram 2: Basic components of process controlNote: Items shown in Diagram 2 are not always used or required Appendix B: Embrittlement and environmental damage mechanisms involving hydrogen and applicable test methods B1.

  • ALTERNATIVE 1 Automatic vent valves Double block and bleed Duct ventilation fanMaster valve H.R. compressor room from fuel gas tanks El. motor room Automatic shut-off valve EngineGas injection valves ALTERNATIVE 2Double block and bleedDuct ventilation fanMaster valve from fuel gas tanks Automatic vent valve H.R. compressor roomEl. motor room Automatic shut-off valves EngineGas injection valves Fig.

  • Double block and bleed: the closure of a line, duct, or pipe by closing and locking/tagging out two in-line valves, and opening and locking/tagging out a drain or vent in the line between the two closed valves.


More Definitions of Double block and bleed

Double block and bleed means the closure of a line, duct, or pipe by closing and locking or tagging two in-line valves and by opening and locking or tagging a drain or vent valve in the line between the two closed valves. "Emergency" means any occurrence (including any failure of hazard control or monitoring equipment) or event
Double block and bleed means the closure of a line, duct, or pipe by closing and locking or tagging two in-line valves and by opening and

Related to Double block and bleed

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