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Mine Safety & Health Conference

Mine Safety & Health Conference. HAZARDOUS ENERGY CONTROL LOCK and TAG Todd Nicholes. AGENDA. What is Hazardous Energy? Why hazardous energy control? Lock and Tag Procedures/Training. Questions and Answers. Identify all hazardous energy. Sources of hazardous energy. Electrical.

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Mine Safety & Health Conference

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  1. Mine Safety & Health Conference HAZARDOUS ENERGY CONTROL LOCK and TAG Todd Nicholes

  2. AGENDA • What is Hazardous Energy? • Why hazardous energy control? • Lock and Tag Procedures/Training. • Questions and Answers.

  3. Identify all hazardous energy

  4. Sources of hazardous energy • Electrical

  5. Sources of hazardous energy • Electrical • Mechanical Movement

  6. Sources of hazardous energy • Electrical • Mechanical Movement • Electricity • Water siphoning • Head/Pressure

  7. Sources of hazardous energy • Electrical • Mechanical Movement • Electricity • Water siphoning • Head/Pressure • Heat

  8. Sources of hazardous energy • Electrical • Mechanical Movement • Electricity • Water siphoning • Head/Pressure • Heat • Cavitation • Current Flow

  9. Sources of hazardous energy • Electrical • Mechanical Movement • Electricity • Water siphoning • Head/Pressure • Heat • Cavitation • Current Flow • Chemical • Gravity • Stored- pneumatic or hydraulic

  10. Consider This Source of Energy • Between 1995 and 1998 -- 62 serious injuries took place in the US with the sudden release of energy stored in garage door springs.

  11. Consider This Source of Energy • Gravity • Counter Balance

  12. Lock and Tag Training • Employee must have knowledge and an understanding of hazardous energy in the facility. • Electrical • Mechanical • Hydraulic • Gravity • Stored • Chemical • Pneumatic • Thermal

  13. Why Hazardous Energy Control? Analysis has found-- • Prior to LOTO regulation each year general industry experienced • 37,500 minor injuries • 33,400 lost workday injuries • 144 fatalities • Employees face significant risk of serious injury and death due to Hazardous Energy that is not controlled • Estimated 85% reduction in injuries with regulation

  14. Why Hazardous Energy Control? • You do not want to be injured. • Your company does not want you injured. • No one should be injured on the job, we do not come to work to be injured.

  15. WARNING Graphic photo’s of actual injuries

  16. Employee working on a pump. Pump had been cavitating, heating up the liquid inside. Employee failed to relieve pressure prior to removing bolts. Why Lock and Tag

  17. Why Lock and Tag • Employee was taking a sample of slurry from this mixing vat.

  18. Why Lock and Tag

  19. Why Lock and Tag • Back when I was younger, I stuck my hand in what's called a rotary valve in the bottom of a silo at work. This valve clogged up all the time and the lock out point was on the other end of the plant. All of us were guilty of doing what I was doing, but I was the one that got caught. Not only did I loose my left thumb, and I am left handed, I also lost my job over this stupid act

  20. Why Lock and Tag • They had to use my big toe to replace my thumb.

  21. Why Lock and Tag • Use lock and tag at home, this guy removed a plug in his snow blower without shutting it off. • At least he was able to retrieve his finger

  22. Why Lock and Tag • This employee removed a guard and then attempted to make an adjustment to a 5000 rpm roller on a conveyor system. • The hand could not be reattached.

  23. Why Lock and Tag it’s the law 30 CFR 75.820 • (b) Prior to performing electrical work…a qualified person must • (3) lock out the disconnecting device with a padlock – (each person must install own padlock) • (4) Tag the disconnecting device to identify each person working and the circuit or equipment on which work is being performed.

  24. Why Lock and Tag it’s the law 30 CFR 77.404 and 30 CFR 75.1725 • (c) Repairs or maintenance shall not be performed on machinery until the power is off and the machinery is blocked against motion, except where machinery motion is necessary to make adjustments.

  25. Why Lock and Tag • Fatality 33 year old electrician- 6 yrs exp. • Performing repairs during mine wide power outage on a continuous miner trailing cable. • Power was restored while repairing 3rd phase

  26. Why Lock and Tag • Fatality 45 yr old belt foreman. 22 yrs exp. • Left arm was amputated by the rotating rollers of belt take up unit. • No witnesses to incident.

  27. Lock & Tag Procedures/Training • Detailed procedures that include • Startup • Shutdown • Normal operation • Emergency operation • Lock and tag points

  28. Lock & Tag Procedures/Training Special Precautions for Electrical • Locate the disconnect (s) • De-energize the circuit • Every worker to place own lock and tag • Test circuit • Ground conductors

  29. Lock & Tag Procedures/Training • Employee must know how to control energy. • Electrical • Mechanical • Hydraulic • Gravity • Stored • Chemical • Pneumatic

  30. Lock & Tag Procedures/Training • Employee must know how to use the Lock and tag procedure to protect himself/herself and co workers. • Affected employees also need to be protected

  31. Steps To Energy- Free Maintenance • Preparation – Think through the task • Notification of other workers who will be affected by the shut-down of machinery • Shut down the operating controls • Isolating the area where work will be performed • Lock-Out/Tag-Out of the affected controls or switches • Performing a safety check to see if re-activation is possible • Purging or dissipation of any residual energy

  32. Energy- Free Maintenance Step 1 • Preparation – Think through the task • What equipment am I working on • What are the sources of energy • Are there prints/electrical drawings to review • Is there a procedure to read through • Is there vendor information that will help • Has other employees worked on this equipment previously

  33. Energy- Free Maintenance Step 2 • Notification of other workers • Check with the supervisor • Walk the area down • Does announcement need to made over PA

  34. Energy- Free Maintenance Step 3 • Shut down of the operating controls • Are there remote operating control stations • Is there a procedure that must be followed to shut down the equipment • Will shut down of equipment put others in harms way

  35. Energy- Free Maintenance Step 4 • Isolating the area where work will be performed • Are barricades needed with warning signs explaining hazards • Overhead hazards • Hazards below

  36. Energy- Free Maintenance Step 5 • Lock-Out/Tag-Out of the affected controls and switches. • Lock out electrical breakers • Close supply and discharge valves • Open vents and drains • Pull control fuses

  37. Energy- Free Maintenance Step 6 • Performing a safety check to see if re-activation is possible. • Push the start button

  38. Energy- Free Maintenance Step 7 • Purging or dissipation of any residual energy • Open vents and drains to relieve liquid pressures i.e. water, chemical, or oil • Open vents and drains to relieve gas pressures i.e. air, nitrogen, O2 etc • Spring tension or compression • Weld or block counter weights in place • Block rotating equipment

  39. Lock and Tag • Questions and Answers • Personal Experiences

  40. Lock and Tag Have a safe and productive workday.

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