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Static ElectricitySafety Presentation
18-09-2015
Static Electricity
Imbalance of electric chargesOn the surface of or within a material; remains until discharged or electrified
Between materials in contact
Triboelectrification
During Storage and Transport of Liquids
Liquid-shear
Between materials not in contact
Induction
Can be Induced by…
Between 2 conductors not in contact
Spark Discharge
Other discharge forms are usually non-hazardous in process industries
Fire
Can Cause…
Bonding GroundingHumidification
Anti-static Agents Conductive Materials Reduced Flow Velocity
Prevention
Chemical Transfer
• VM&P Naphtha Transfer from Tanker-Trailer to Day Tanks
• At Barton Solvents Wichita Facility, Kansas
Spark Discharge• Low Conductivity;
• Static Electricity buildup;
• Improper design
Fire • Class 1B
Flammable Liquid;
• Ignitable vapor-air Mixture
Barton Solvents – Case Study by CSB
Explosion; 12 people injured; 6,000 people evacuated
Metal piece from Day Tank found 130 feet from original location
Accident causes Recommendations
Thank you!
• References / Picture Sources
• http://www.csb.gov/assets/1/19/csb_study_barton_final.pdf
• http://web.mst.edu/~dludlow/classes/che258/Static%20Electricity%20and%20Charge%20Accumulation.ppt
• http://sciencebehindelectricity.weebly.com/static-electricity.html
• http://www.shimadzu.com/an/hplc/support/qn50420000002bad-img/qn50420000006ji2.gif
• http://electrical4u.com/electrical/wp-content/uploads/2013/03/electrostatic-induction1.png
Karthik