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EXPLOSIONS

EXPLOSIONS. FDY 493 Jim Cleary. EXPLOSIONS. Overview: What is an explosion? What can fuel an explosion? Explosion effects Protection from explosions Case studies. EXPLOSIONS. What is an explosion? Rapid combustion in a confined space Requires fuel, oxidizer and ignition source

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EXPLOSIONS

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  1. EXPLOSIONS FDY 493 Jim Cleary

  2. EXPLOSIONS • Overview: • What is an explosion? • What can fuel an explosion? • Explosion effects • Protection from explosions • Case studies

  3. EXPLOSIONS • What is an explosion? • Rapid combustion in a confined space • Requires fuel, oxidizer and ignition source • Rapid combustion causes container to rupture

  4. EXPLOSIONS • What can fuel an explosion? • Flammable liquid vapours • Chemical explosives • Flammable gases

  5. EXPLOSIONS • Explosion effects • Fireball • Ignition of nearby combustibles • Pressure wave • Damage to building and equipment • Injuries or fatalities • Shrapnel • Same as for pressure wave

  6. EXPLOSIONS • Protection from explosions • Explosion venting – most common • Must be done in accordance with NFPA 68 • Explosion suppression • Very expensive

  7. EXPLOSIONS • Protection from explosions • Containment • Requires very strong vessels • Inerting • Common for chemical reactor protection

  8. EXPLOSIONS • Case studies • Pepcon • Oppau • Texas City • Port Chicago • Halifax

  9. EXPLOSIONS • Class work: • Research the case studies noted above • Wikipedia has fairly good articles on all of them • Review the requirements of Chapter 5 of NFPA 68 • Note well the formula for calculating how much explosion vent area is required • NFPA 68 is available electronically in MySeneca from the library • Do the self-test located in MySeneca

  10. EXPLOSIONS • Discussion • I’ll be available to do an online chat to discuss the material on the web page and in this presentation • Go to MySeneca, then Communication, then Collaboration, then April 25 Virtual Classroom (click ‘join’).

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