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Sprinklers Evolved by Allan Macpherson, FM Global

Sprinklers Evolved by Allan Macpherson, FM Global. IFE Scotland and BAFSA : Technical Sprinkler Seminar 2010 National Library of Scotland 20 January 2010. It started simply…. Summer, 1891. Then in the 1950’s…. Standard Spray Sprinkler. Then came…. A bunch of Control Mode Density

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Sprinklers Evolved by Allan Macpherson, FM Global

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  1. Sprinklers Evolvedby Allan Macpherson, FM Global IFE Scotland and BAFSA : Technical Sprinkler Seminar 2010 National Library of Scotland 20 January 2010

  2. It started simply… Summer, 1891

  3. Then in the 1950’s… Standard Spray Sprinkler

  4. Then came… A bunch of Control Mode Density Area (CMDA) sprinklers… - Large Orifice Sprinkler - Extra Large Orifice (ELO) Sprinkler - Very Extra Large Orifice (VELO) Sprinkler

  5. Other Milestones • 1970 ----> Residential Sprinkler • 1970 ----> Large Orifice Sprinkler (CMSA) • 1980 ----> ESFR (SM)

  6. Leading to… more Control Mode Density Area (CMDA) sprinklers… and a bunch of Control Mode Specific Application (CMSA) sprinklers… …and a bunch of Suppression Mode (SM) sprinklers

  7. Where we are in 2009? • Three different sprinkler categories • Three sets of installation guidelines (461 pages of guidance!) • Terminology indicates intended performance • Two different design formats

  8. Stepping back… • Existing terminology misleading • Actual performance can be otherwise • Control mode sprinklers - fire suppression • Suppression mode sprinklers - fire control

  9. Change in sprinkler terminology • New terminology based on intended use: • Storage sprinkler • Non-storage sprinkler • Special protection sprinkler

  10. Quiz True or False? Two different FM Approved control mode sprinklers discharging the exact same amount of water will provide equivalent protection

  11. K 360 • K 80

  12. K factor video

  13. K 80 250 l/min @ 10 bars K 360 250l/min @ .5 bar Light fog - Minimal penetration - Easily pushed aside - Prone to skipping Heavy downpour - Better penetration - Difficult to push aside - Skipping less likely

  14. Test 1 – 32 mm/min density / upright

  15. Test 2 –24 mm/min density / pendent

  16. Test 2 – K 360 EC sprinkler Lower water demand 10.7 m. building 6 sprinklers at 2.75 bars 3600 l/min More cost effective Spacing up to 18 m2 per head means less pipe, fewer sprinklers Much less fire, smoke and goods damage

  17. What’s really most important? • Sprinkler K factor (~ nozzle size) • Orientation (upright or pendent) • RTI (standard or quick response) … and not so much • Ceiling discharge density

  18. What does this mean for Data Sheets? • Need to update sprinkler terminology • Need to replace density in design criteria • Opportunity to simplify and improve

  19. New Data Sheet 2-0 • Replaces 2-2, 2-7, 2-8N • Installation rules – sprinkler type • Acceptance tests

  20. New Data Sheet 8-9 & Protection Tables • Needed to update terminology • Transition design format away from density • Easier to identify the best protection options • Paves the way for future improvements

  21. Protection tables based on • Ceiling height • RTI (standard or quick response) • Orientation (upright or pendent) • Sprinkler K factor (~ nozzle size)

  22. Sample protection table

  23. Many of these new designs mean: Less Resources • Less Sprinklers • Less Piping More Sprinklers Installed ! Greater Sustainability • Less Labour • Less Water • Lower Pressures

  24. What is the bottom line? Through these Data Sheet changes, FM Global is poised to provide our clients, with themost effective protection options, which are not onlysimplerandcheaperto install, but a moresustainablechoice.

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