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.
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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;
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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.
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Examples of Double block and bleed in a sentence

  • 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.

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


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
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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
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Related to Double block and bleed

  • Common Channel Signaling (CCS) means an out-of-band, packet-switched, signaling network used to transport supervision signals, control signals, and data messages. It is a special network, fully separate from the transmission path of the public switched network. Unless otherwise agreed by the Parties, the CCS protocol used by the Parties shall be SS7.

  • Uppermost aquifer means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer within the facility's property boundary.

  • Common Channel Signaling (CCS) means an out-of-band, packet-switched, signaling network used to transport supervision signals, control signals, and data messages. It is a special network, fully separate from the transmission path of the public switched network. Unless otherwise agreed by the Parties, the CCS protocol used by the Parties shall be SS7.

  • High voltage bus means the electrical circuit, including the coupling system for charging the REESS that operates on high voltage.

  • Diameter at Breast Height (DBH) means the diameter of the trunk of a mature tree generally measured at a point four and a half feet above ground level from the uphill side of the tree. For species of trees where the main trunk divides below the 4 ½ foot height, the DBH shall be measured at the highest point before any division.