Static electricity ignition source control

Static electricity discharges and unexpected electrical currents are frequently overlooked as potential sources of ignition that must be controlled. Some of the conditions that may result in sufficiently intense electrical discharges or arcing are ... 

Rescuers should take care in areas with high vapor concentration. Care should be taken to control any potential ignition sources, such as sparks from static electricity. 

Make sure that piping and equipment inspections and preventive maintenance tasks are completed as required to ensure mechanical integrify of process equipment. Containment of fuel is the best way to prevent vapor cloud explosions. Ignition sources forflammable vapor clouds for example, heaters, vehicles, unclassified electrical areas, hot work, static discharge — are difficult to control. 

Static electricity is generated where there is relative motion and/or separation of two dissimilar materials. The charge can be transported or conducted some distance before it becomes great enough to cause a discharge which provides the source of ignition. The best means of control is... 

The source of ignition can be an open flame, a spark, a hot surface, static electricity, or autoignition. Plant personnel must strive to eliminate all ignition sources from locations where flammable materials are stored or handled or must institute procedtues to control the resulting hazards. 

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