Leadership

RECOMMENDED METHODS TO MAKE EMPTY TANKS SAFE FOR WELDING

Issue 5 and Volume 88.

RECOMMENDED METHODS TO MAKE EMPTY TANKS SAFE FOR WELDING American Welding Society Outlines Methods for Melting Such Tanks Safe for Later Welding or Cutting Operations SEVERAL fatal accidents have occurred as the result of welds being made on tanks which formerly held combustible contents. Even though the tank has been emptied and permitted to remain “empty” for several days, the rest period has not been found sufficient to free the tank from heavy explosive gases. The problem has engaged the attention of the American Welding Society, and tentative recommendations have been drafted for welding or cutting certain types of containers which have held combustibles. Three methods are outlined. The preventative work may be done by the inert gas method which employs nitrogen or carbon dioxide, hot chemical cleaning method, and the steaming method. Any one of these methods is applicable where the container held gasoline and is complete in itself.…

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