S.L. 646.3 Art. 14Explosive or inflammable substance.

(1) Where, in connection with any process giving rise to dust, gas, vapour or substance, there may escape dust, gas or vapour of such character and to such an extent as to be liable to explode on ignition, all practicable steps shall be taken to prevent each an explosion by enclosure of the plant used in the process and by removal or prevention of accumulation of any dust, gas, vapour or substance that may escape in spite of the enclosure, and by the exclusion or effective enclosure of possible sources of ignition.

(2) No plant, tank or vessel which contains or has contained any explosive or inflammable substances shall be subjected -

(a) to any welding, brazing or soldering operations;

(b) to any cutting operation which involves the application of heat; or

(c) to any operation involving the application of heat for the purpose of taking apart or removing the plant, tank or vessel or any part of it, until all practicable steps have been taken to remove the substance and any fumes arising from it, or to render them non-explosive or non-inflammable.