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Highly Flammable?
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sheman  
#1 Posted : 14 February 2011 19:54:42(UTC)
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sheman
Good evening colleagues, I am not sure if this has been clarified recently (and apologies if it has) but some assistance on a definition please: Highly flammable? 1. Defined as ‘The minimum temperature at which a liquid, under specific test conditions, gives off sufficient flammable vapour to ignite momentarily on the application of an ignition source’. A highly flammable liquid is defined as one with the flashpoint below 21oC or 2. Defined as liquids with flash points below 32oC and hence those which give off flammable vapour at or below normal atmospheric temperatures Please could someone clarify which, if any, is the correct/most up-to-date definition and where does this come from- RR(FS)O (CHIP4), DSEAR, CLP, Annex III to the Waste Directive ??? Help would be very much appreciated.
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Ron Hunter  
#2 Posted : 14 February 2011 23:42:20(UTC)
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Ron Hunter
For the purposes of CHIP/CLP, the terms are highly or extremely flammable F or F+. See http://www.hse.gov.uk/chip/phrases.htm That said, from my time in the lab, I seem to recall anything with a flash point between 55 oC and 21 oC was highly flammable. Less than 21 is extremely flammable? Hopefully someone with more up-to-date experience of applying ISO closed-cup testing will be able to clarify.
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Ron Hunter  
#3 Posted : 14 February 2011 23:47:22(UTC)
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Ron Hunter
Ignore previous post. Getting my extremes confused. Definitive answer I believe is contained within: http://www.hse.gov.uk/pubns/priced/l131.pdf
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Guru  
#4 Posted : 15 February 2011 09:06:27(UTC)
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Guru
Your question has already been answered by Ron, but I'd like to add that the ADR regs requires all chemicals with a flashpoint of no more than 60 oC to be labelled class 3 flammable. So if your organisation deals with drums of chemicals, with a flashpoint of between 55 oC and 60 oC it would most likely be lablelled as flammable too.
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Jane Blunt  
#5 Posted : 15 February 2011 09:16:32(UTC)
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Jane Blunt
Be aware that they will be changing soon, to the Global Harmonised system - see this document for the new thresholds: http://www.unece.org/tra...01/English/02e_part2.pdf
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Ron Hunter  
#6 Posted : 15 February 2011 15:40:00(UTC)
Rank: Super forum user
Ron Hunter
As Jane says, CHIP also refers to 3 "levels" of flammability; flammable, highly flammable and extremely flammable. Only the last two seem to require the application of the warning symbol, and these are designated "F" and "F+".
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