. Never use an electric arc welder to thaw frozen pipes. Flying sparks and hot metal can cause injury. As welds cool, slag can be thrown off. Take all precautions described in this manual to reduce the possibility of injury from flying sparks and hot metal. . Wear ANSI approved face shield or safety glasses with side shield protection when chipping or grinding metal parts. . Wear ear plugs when welding overhead to prevent spatter or slag from falling into ears. Electric arc welding operations pr