PART XXI WELDING, BURNING AND CUTTING OPERATIONS — Gas welding and burning
449(3)
A worker shall prevent a spark or flame from coming into contact with a cylinder, regulator or hose of a compressed-gas system and charged gas cylinders shall be protected from a source of heat in excess of 54.44 ° Celsius.
449
(1) Welding, cutting, and similar processes shall be carried out according to the requirements of
449(a)
CSA Standard W117.2 in "Safety in Welding, Cutting and Allied Processes" or another standard acceptable to the minister;
449(b)
the manufacturer's instructions and recommendations for the equipment being used; and
449(c)
the applicable requirements of these regulations.
449(2)
Cylinders, piping and fittings of compressed and liquefied-gas systems shall be located or protected in a manner that prevents physical damage to them.
449(4)
Before gas-welding or burning equipment is put into use, a worker shall ensure that parts are free from defects, leaks or oil and grease and only standard fittings, designed and manufactured for the specific compressed gas service shall be used.
449(5)
A regulator or an automatic reducing valve of welding equipment shall only be used for the gas for which it was designed.
Not legal advice. Verify the cited article against the signed agreement.