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  2. 2. INTRODUCTION • Persons who work on or around hazardous energy sources have to be aware of controls required to prevent injury or accidents • Hazardous energy is the energy stored that if released may cause a serious accident or physical damage. I l t t t i j d t t d• Isolate energy to prevent injury due to unexpected startup of equipment or released energy. Maintenance/servicing operations often require employee to place part or all of his/her body into machine’s point ofto place part or all of his/her body into machine s point of operation, if the machine is not completely isolated it can be started and you will be in they LINE OF FIRE
  3. 3. TYPES OF HAZARDOUS ENERGY • Electrical – 220 - 380 v, high voltage - substations • Chemical – reaction, fire, explosion • Mechanical• Mechanical – release of a spring, moving parts, falling objects, Pistons under pressurep • Thermal Radiation – hot/cold, radiationhot/cold, radiation • Pressure – pressurized gases, vacuum pumps, pneumatic cylinders, hydraulics
  4. 4. ISOLATION • Any equipment able to store hazardous• Any equipment able to store hazardous energy has to be isolated before any work is carried outcarried out • Only trained and authorized persons can i l t thiisolate this energy. • Sometimes is just turning the switch off and removing from the socket (electrical energy) • For more complex operations, it might meanp p g closing valves, putting blinds in place etc (pressure energy)(p gy)
  5. 5. ISOLATION IS REQUIRED WHEN: When servicing maintaining or repairing mechanical• When servicing, maintaining or repairing mechanical equipment where parts could create a hazard. • When working on pipelines that carry hazardous chemicals (e.g. high pressure, toxic, corrosive, etc.). • On electrical circuits and systems where a high risk of electrical shock existselectrical shock exists. • Where other hazardous energies exists that may cause injury if intentionally released during service or maintenance.
  6. 6. IF YOU DON’T ISOLATE Types of hazardous energy with risks: Electrical Thermal Radiation • electrical shock • burns • fire / explosion • burns hot/cold • fire • eye injuriesp • secondary injuries • DEATH Chemical • eye injuries • skin cancer • DEATH P (h d li & ti )Chemical • chemical splash • inhalation burns Pressure (hydraulic & pneumatic) • punctures • secondary injuries • burns • dermatitis • Cancer DEATH • bends - air blockage in the bloodstream • physical hazards - flying • DEATH Mechanical • crushing of body parts p y y g particles • DEATH • amputation • Entanglement • DEATH
  7. 7. THESE HAVE HAPPENED ELECTRICAL ENERGY Failing to electrically MECHANICAL ENERGY Failing to isolate PRESURE ENERGY Failing to isolate high CHEMICAL ENERGY Failing to understand isolate machinery before opening may lead to electrocution machinery before working may crush you where injury pressure before working on a system could be the properties of chemicals you ARE using could be where injury could be fatal. SWITCH OFF AND could be fatal. MECHANICALLY fatal SWITCH OFF AND fatal. ENSURE YOU READ ISOLATE THE EQUIPMENT BEFORE ANY MAINTENANCE ISOLATE THE EQUIPMENT BEFORE ANY MAINTENANCE ISOLATE ALL PRESURE SOURCES BEFORE AND UNDERSTAND THE MSDS BEFORE YOU WORK WITH STARTS. as low as 30 volts can carry enough current to kill STARTS. Working on unfamiliar machinery is a hazard ANY MAINTENANCE STARTS. Properly vent all systems ANY CHEMICAL Before working – release, drain or vent chemicals safelybefore starting work safely
  8. 8. Control Stored Energy Bl k l i th t i gy • Block or release springs or other tension • Block elevated parts • Stop rotating flywheels • Relieve system pressure• Relieve system pressure • Drain fluids • Vent gases
  9. 9. CONCLUSION Know your equipment & systemsKnow your equipment & systems – hazards isolation points– isolation points – procedure for isolating W ki f ili hi i h dWorking on unfamiliar machinery is a hazard