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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Fire Safety => Topic started by: Hi Tower on September 03, 2010, 09:18:32 AM
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It is detailed in table 2 of the above standard that the amount of wet chemical required to extinguish a cooking oil fire increases accordingly with respect to the surface area of the cooking oil vat; e.g. 0.06 square metres = 5F extinguisher, 0.27 square metres = 75F + 25F. This makes sense until you reach the last example which states 0.40 square metres = 75F. Why in this case where the surface area increases does the amount of wet chemical media required decrease? Is it as simple as a misprint or am I missing something?
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Good Question,
The more I looked, the more confusing it got. It must be a typo and not just one, if I try to reason the calculation regardless of derating it got worse.
Where's my Rubiks Cube.......
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no, it refers to 2 x 75F.
Column one is area where two extinguishers are used.
Row 1 is therefore 2 x 5F
Row 2 2 x 15F
Row 3 2 x 25F
Row 4 a 75F + a 15F
Row 5 a 75F + a 25F
Row 6 2 x 75F
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I get it now, thanks, although it would have been better put in a table like this maybe
Maximum surface area to be extinguished (m2) Minimum Extinguisher(s) required
0.015 1 x 5F
0.02 1 x 15F
0.04 1 x 25F
0.06 2 x 5F
0.08 2 x 15F
0.11 1 x 75F
0.13 2 x 25F
0.24 1 x 75F + 1 x 15F
0.27 1 x 75F + 1 x 25 F
0.40 2 x 75F
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Thanks AB
Like D999 says the table could be presented better, like shown - but thank you for the explanation