Make sure dangerous energy and materials are isolated or removed after lockout and tagout. Can be confirmed by:
-- observe pressure gauges, mirrors or liquid level indicators to ensure that dangerous energy stored in containers or pipelines has been removed or blocked;
-- visually confirm that the connecting parts are disconnected and the rotating equipment has stopped rotating;
-- for work tasks exposed to electrical hazards, check that the power supply wire has been disconnected, and all locks must be physically disconnected and no power has been tested.