S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

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168. The oxygen supply hose and the combustible gas supply hose of a welding torch shall be equipped with at least one nonreturn gas device and at least one nonreturn flame device. Those devices must be installed according to the instructions of the manufacturer.
O.C. 213-93, s. 168; O.C. 465-2002, s. 8.