Chemical Engineering July 2021 - 34

centration, explosion suppression,
deflagration pressure containment,
and spark extinguishing systems.
NFPA 61. NFPA 61 is the Standard
for the Prevention of Fires and Dust
Explosions in Agricultural and Food
Processing Facilities. This standard
covers all facilities engaged in handking
dry agricultural bulk materials,
including grains, oilseeds, agricultural
seeds, legumes, sugar, flour,
spices, feeds, and other related materials,
such as starch.
NFPA 484. NFPA 484 is the Standard
for Combustible Metals. This
standard covers all metals and alloys
in a form that is capable of
combustion or explosion, and it
outlines procedures that shall be
used to determine whether a metal
is combustible or noncombustible
form. It also applies to processing
or finishing operations that produce
combustible metal powder or dust
such as machining, sawing, grinding,
buffing and polishing.
NFPA 664. NFPA 664 is the Standard
for the Prevention of Fire and
Explosions in Wood Processing and
Woodworking Facilities. This standard
establishes the minimum fire
and explosion prevention requirements
for
facilities
that
process
wood
or manufactured wood products
using wood or cellulosic fibers,
creating wood chips, particles
or dust. Examples include wood
flour plants, industrial woodworking
plants, furniture plants, plywood
plants, composite board plants,
lumber mills, and production-type
woodworking shops and carpentry
shops that meet minimum requirements
for plant size or dust collection
flow rates.
NFPA 655. NFPA 655 is the Standard
for Prevention of Sulfur Fires
and Explosions. This standard covers
explosion and fire hazards encountered
in the handling, crushing,
grinding, and pulverizing of bulk and
liquid sulfur.
Concluding remarks
There is always more than one way
to achieve combustible dust safety.
The expertise is in reviewing each
option for a particular industrial process
and arriving at a combination
of housekeeping and technologies
that is technically effective, as well as
cost effective, in meeting the owneroperator's
responsibilities under
OSHA and NFPA standards.
n
Edited by Scott Jenkins
Author
Clive Nixon is a sales manager
for BS&B Pressure Safety Management
(7455 East 46th Street,
Tulsa, OK 74145; Phone: 918622-5950;
Email:
clive.nixon@
bsbsystems.com). Nixon supplies
explosion protection solutions to
the food, chemical, wood, and
grain industries, and has over 20
years of experience in the field of
industrial explosion protection. He holds a degree in
technical communications from Northeastern University,
and an higer national certificate (HNC) in electrical and
electronic engineering from Slough College of Technology
in Berkshire, England. He has presented seminars
on the subject of industrial explosion protection for the
International Powder & Bulk Solids Conference/Exhibition
Conference, Rosemont, Ill.; Interphex Pharmaceutical
Manufacturing Conference & Exhibition, New York
City; NFPA World Safety Conference & Expo, Baltimore,
Md.; The Department of Engineering Professional Development,
University of Wisconsin-Madison; Powtech, Sao
Paulo; and e-Week, Albany, N.Y.
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Chemical Engineering July 2021

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