PART XXI WELDING, BURNING AND CUTTING OPERATIONS — Burning and welding
453
(1) Burning, welding or other hot work shall not be done in an area where there is a likelihood of the presence of flammable substances until
453(a)
tests have been done to ensure that work may be safely performed; and
453(b)
suitable procedures have been adopted to ensure that all existing or potential sources of ignition have been eliminated or effectively controlled.
453(2)
Where testing procedures are used, tests shall be conducted at intervals to ensure the continuing safety of workers.
453(3)
Burning, welding or cutting shall not be done where there is a danger of extreme heat coming into contact with a concrete surface unless that surface is protected from the source of heat.
453(4)
Suitable safety devices to prevent reverse gas flow and to arrest a flashback shall be installed according to the manufacturer's instructions on each hose in an oxygen system between the torch and the regulator.
Not legal advice. Verify the cited article against the signed agreement.