Scott,
I am not sure that EH-2 would be prudent. The wax would not be heated
anywhere near its flashpoint as this would inhibit the manufacturing
operation. The flashpoint of paraffin is close to its autoignition
temperature. Paraffin is not as onerous as one would be led to believe. A
glance at the MSDS for paraffin reveals that its melting point is 47 C to
65 C and its flashpoint is 199 C closed cup and 235 C open cup.
Autoignition temperature is 245 C. As you can see there is quite a bit of
difference between the melting temperature and the flashpoint temperature.
If the tenant space is heating this paraffin to its flashpoint, they are
using way more energy than necessary and the result will not be useful to
them.
I suggest that Mr. Phelan download an MSDS or procure one from the tenant
for the wax they are using. As an aside, bees wax and paraffin are quite
different. Bees wax has a melting point of 145 C, a flashpoint of 470 C
and an autoignition temperature of 520 C and does not produce soot when it
burns.
Thank You
Rahe Loftin, P.E.
Region 7 - GSA
Office - 817-978-7299
Fax - 817-978-8644
Cell - 817-371-3102
"Scott Mitchell"
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[EMAIL PROTECTED] Subject
er.org Re: Classification of Wax Candle
Manufacturing
05/03/2007 09:27
PM
Please respond to
[EMAIL PROTECTED]
resprinkler.org
Regarding the manufacturing portion - if the wax is heated to a temperature
at or above its flashpoint AND it is not a closed process (open vats or
something), then EH-II would be prudent.
J. Scott Mitchell, P.E.
David Phelan <[EMAIL PROTECTED]> wrote:
Greetings ...
Could anyone offer some ideas on the Occupancy Classification for a 3,000
tenant space in a sub-divided industrial building where the tenant takes
blocks of parrafin wax and after heating, coloring, processing, and such
makes finished candles for mail order shipment.
The design professional is indicating that this is an OH-2 and is choosing
.2 gpm/ft over 1500 for his design curve. This limits the storage height to
5 feet which will be a matter for later enforcement ..... Using the
appendix the commodity classification makes it a Group A plastic, but if
they went occupancy classification since its under 12 foot storage wouldnt
this be closed to an Extra 1 class?
Any thoughts or experiences to relate ?
Dave P.
An AHJ in NJ
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