This document is uncontrolled when printed.
Canada
Lock and tag the isolation and bleed valves in accordance with the Lockout Tagout Procedure
(CPC‐ALL‐HSE‐PRC‐179).
The devices used to secure the valves must be strong enough and designed to withstand
inadvertent opening without the use of excessive force, unusual measures, or destructive
techniques.
Note: In British Columbia, during a confined space entry, the diameter of the bleed line must
be no less than the diameter of the line being isolated, unless certified by a professional
engineer.
Note: In British Columbia, the bleed must be checked to ensure that it remains clear of
obstructions while the confined space is occupied, either by continuous monitoring or
by manually checking within 20 minutes before worker entry, or before worker re‐entry
after the space has been vacated for more than 20 minutes.
Note: In Saskatchewan, a designated worker must monitor the valves to ensure they are not
activated while a worker is in the confined space. The designated worker must record
the date and time of each monitoring event on the tag and sign the tag each time.
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