The N95 masks that everyone is talking about means that is will filter out of
95% of the 3 microns or larger. The Covid 19 virus is approximately 0.17
microns but usually travels attached to a fluid droplet, which is larger. The
thickness of a piece of paper is about 100 microns.
On May 22, 2020, at 2:49 PM, Sprinkler Academy - C Bilbo via Sprinklerforum
wrote:
>
> . for the record a micron is about the thickness of a sheet of paper.
>
No way. Is not a micron a millionth of a meter? A meter is about 39 inches.
That means an inch is slightly more than 25641
Now that’s is just funny but unfortunately is sometimes typical for a technical
committee.
Happy Memorial Day weekend.
John
John August Denhardt, P.E.
Vice-President Engineering and Technical Services
American Fire Sprinkler Association
301-343-1457
> On May 22, 2020, at 3:49 PM,
To lighten the mood as we go into Memorial Day weekend
Sometime around 2007, there was a rather large discussion on the size of a
piece of combustible dust. The standards are not aligned (see 'combustible
dust' in the Glossary of Terms). The argument, I mean debate, of the floor of
the
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KFIengineers.com<http://www.kfiengineers.com>
From: Sprinklerforum On Behalf
Of Scott Futrell via Sprinklerforum
Sent: Friday, May 22, 2020 12:59 PM
To: sprinklerforum@lists.firesprinkler.org
Cc: Scott Futrell ; Ron Greenman
Subject: RE: Dust Collection
NFPA 91: Standard for Exhaust Systems for Air Conveying of Vapors, Gases,
Mists, and Particulate Solids
NFPA 654: Standard for the Prevention of Fire and Dust Explosions from the
Manufacturing, Processing, and Handling of Combustible Particulate Solids
Does that help?
Scott
Office: (763)
: Dust collection - where/when are sprinklers required
IFC - 903.2.11.4 Ducts conveying hazardous exhausts.
IMC - 510.7 Suppression required.
Ducts shall be protected with an approved automatic fire suppression system
installed in accordance with the International Building Code.
[F] 510.2.1
Steve,
Section 506.6 of the Mechanical Code requires sprinklers inside ducts exceeding
10-inches that convey flammable vapors or fumes, but I cannot find a similar
mandate for ducts conveying sawdust in either NFPA 664, CBC or CFC.
Interestingly, NFPA 664 speaks about duct sprinklers free of
Thanks Galen - this exactly the same info I arrived at through my own
process this morning. It's a DSA project where and existing dust
collection system was moved from an old non sprinklered wood shop building
into an interim housing environment. It originally had a couple sprinklers
in it, piped
IFC - 903.2.11.4 Ducts conveying hazardous exhausts.
IMC - 510.7 Suppression required.
Ducts shall be protected with an approved automatic fire suppression system
installed in accordance with the International Building Code.
[F] 510.2.1 Lumber yards and woodworking facilities.
Equipment or
A how to, not a when, but:
NFPA 68: Standard on Explosion Protection by Deflagration Venting.
On Thu, Sep 19, 2013 at 11:54 AM, Steve Leyton
st...@protectiondesign.comwrote:
Thanks Galen - this exactly the same info I arrived at through my own
process this morning. It's a DSA project where
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