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 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;
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.
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
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