16. WELDING AND FLAME CUTTING 78 Using a torch in closed and confined spaces Learn the instructions regarding working in closed and confined spaces before attempting the work. Make arrangements for this work with your supervisor, especially when there is only one way of access to the place where you are working. Always provide adequate ventilation when you use a torch in a closed or confined space. Check the gas hoses and equipment separately prior to each time you use them. Always watch for gas leaks from hoses or torch in confined spaces. Only authorized hose repairmen are allowed to fix the hoses at the spot. Do not work in a confined space unless a watchperson is outside and is continuously within sight and hearing from you. The watchperson is to be trained so that he knows how to turn off the gas if any hazard should occur. Keep the gas hoses and welding cables separate when working in tanks. If the cable insulation fails, the resulting electric arc could cause a fire in the hose. If possible, leave one exit free from any cables and hoses. If needed, consult your supervisor regarding opening an additional passage to the space. Always remove gas equipment from confined spaces at the end of your working day and even when you take a break. Always close the valves in the distribution manifold and the cylinders after your working day.
To see the actual publication please follow the link above