Ask three BC safety coordinators where the hot work permit requirement comes from and you may get three answers. The honest one is that the OHS Regulation sets out specific hot work rules in Part 12 (Tools, Machinery and Equipment), but the words "hot work permit" are a site-practice tool built on top of them. Here is what the Regulation says, so you can design a permit that actually covers it.
The sections that apply
| Section | What it requires |
|---|---|
| s.12.112 | Welding, cutting and similar processes must follow CSA Standard W117.2-94, Safety in Welding, Cutting, and Allied Processes |
| s.12.114 | Effective local exhaust ventilation at any fixed work station to minimize exposure to welding, burning or soldering contaminants |
| s.12.115 | Metal coatings that could emit harmful contaminants (lead, chromium, organics, toxic combustion products) must be removed before welding or cutting, whenever practicable |
| s.12.116 | Containers that may have held combustibles must be cleaned first; no hot work where a flammable or explosive substance is likely until tests are made by a qualified person and safe work procedures are adopted |
| s.12.119 – 12.120 | Gas welding and burning equipment checked for defects, leaks, oil and grease; flashback devices on each oxyfuel hose |
| s.12.123 | Flame resistant clothing, gauntlet gloves and arm protection, apron for heavy work, eye and face protection, substantial safety footwear |
| s.12.125 | Recently welded or flame cut work marked "HOT" or guarded if a worker not involved is likely to enter the area |
| s.12.126 | At least one suitable fire extinguisher immediately available at the work location, with locations marked and made known to workers |
Section 12.116 is the one that matters most
Under s.12.116(2), burning, welding or other hot work must not be done on any vessel, tank, pipe or structure, or in any place where a flammable or explosive substance is likely to be present, until two things are in place: tests by a qualified person to ensure the work can be done safely, and suitable safe work procedures, including additional tests at intervals that keep the workers safe. That is the closest the Regulation comes to describing what a permit records: who tested, what they found, when, and the procedure being followed.
What the Regulation text does not spell out
The sections above do not set a fire watch period or a clearance distance for combustibles. Those practices usually come from CSA W117.2 (which s.12.112 incorporates), from insurer requirements, and from your own site rules. We have not reproduced that standard here, so check it directly when you write your procedure. A permit is a practical way to record that those arrangements were made before the torch was lit.
Hot work in a confined space
If the work happens inside a tank, vessel, pit or other confined space, Part 9 applies as well, including atmospheric testing before entry and standby arrangements. Welding and cutting inside a space also adds ventilation and contaminant concerns. That is when you need both a hot work permit and a confined space entry permit, completed together.
What a good BC hot work permit records: location and task, flammable or combustible hazards assessed (s.12.116), tests and who did them, extinguisher location (s.12.126), PPE (s.12.123), fire watch arrangements and a sign-off before work starts. The free BC Safety Docs hot work permit has an assessment, an equipment and PPE checklist, a fire watch section and an authorization sign-off.