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Interior Maintenance Company, Inc.Jon Barrett- Business Development Specialist
Phone: 267-886-7903 Email: [email protected]
Specialists in Industrial and Commercial Cleaning services including Combustible Dust, High Surface,
HVAC Air Duct System, Dust Collector, and Lab Fume Hood System cleaning, serving the United States.
Copyright 2011 Interior Maintenance Company, Inc. www.imc.cc
CSB Combustible Dust Safety Videos on www.YouTube.com
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Got Dust?
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Significant accumulation of particulate dust at the ceiling of production facility.
PA Coal Miners Circa 1920- PPE and Safety Issues?
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On Friday, December 31, 2010, 4 People injured in explosion at factory in Blacksburg, VA
• Federal-Mogul spokesman Jim Burke said the contract workers were conducting routine duct cleaning at the time of the explosion. Four employees of a Roanoke environmental services firm were cleaning metallic dust from ductwork when the explosion occurred.
•Federal-Mogul spokesman Jim Burke “the dust is flammable, and said removing the dust was among the reasons for the routine cleaning. It is a byproduct of the operation there"
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Federal-Mogul Corp. plant- After Combustible Dust Explosion
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Federal-Mogul Corp. plant- Post Combustible Dust Explosion Investigation
• Blacksburg Fire Chief Keith Bolte said the workers’ job was to vacuum ductwork or piping of aluminum dust, which was collected into a barrel and bag on board a truck.
• But during the vacuuming, the dust exploded, he said. The area around the explosion caught fire, including the dust that had already been vacuumed
• A truck in an adjacent parking lot outside the plant that also caught fire took longer to control.
• Company Spokesman Burke said Federal-Mogul “is dedicated to employee safety, has safety processes in place and expects suppliers and contractors to work safely as well.” www.imc.cc
Fresh footprints
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PVC Resin Dust- 2 feet Deep in some Areas!
PVC Resin Dust-several inches thick on Overhead Beams!
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Show Me The Dust!
www.imc.ccSignificant accumulation of dust within an HVAC duct system.
Treat All Dust as if they are Combustible Dust, Unless Tested!
• Have a Sampling of Dust Tested, for Kst Value!
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Combustible Dust KST Value Chart
When looking to protect your equipment against a dust explosion, it is critical that you know the
Kst value of your material. Kst, is the dust deflagration index, and it measures the relative
explosion severity compared to other dusts. This is a relative index, however, and any material
with a Kst value greater than zero is considered to be at risk of an explosion. In fact, sugar has a
relatively low Kst value, but was the fuel for for a massive explosion in 2008 that claimed the lives
of 14 workers1.
Examples of Kst Values for Different Types of Dusts2
Dust explosion
class* Kst (bar.m/s)* Characteristic* Typical material**
St 0 0 No explosion Silica
St 1 >0 and ? 200 Weak explosion Powdered milk, charcoal, sulfur, sugar
and zinc
St 2 >200 and ?
300 Strong explosion
Cellulose, wood flour, and poly methyl
acrylate
St 3 >300 Very strong
explosion
Anthraquinone, aluminum, and
magnesium
The actual class is sample specific and will depend on varying characteristics of the material such
as particle size or moisture.
* OSHA CPL 03-00-008 - Combustible Dust National Emphasis Program.
** NFPA 68, Standard on Explosion Prevention by Deflagration Venting.
IMC Technicians Performing High Surface cleaning of Dust
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HEPA Vacuuming Combustible Aluminum/Titanium Dust on Ceiling Beam
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Initial Combustible Dust Hazards
• Manufacturing facilities need to Test/Evaluate Combustible Dust/Particulate, in all areas with the presence of dust. MSDS do not address the Combustible Dust Hazard.
• Most manufacturing facility's Housekeeping or Custodial staff are not typically trained, nor equipped for safe cleaning procedures, proper containment, recycling, and disposal of Combustible Dust/Particulate.
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HEPA Vacuuming With Explosion Proof Vacuum-Combustible Aluminum/Titanium Dust on Vertical
Wall Surface
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HEPA Vacuuming With Explosion Proof Vacuum-Combustible Dust on Vertical Wall Surface
Clean Dust
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Facility Awareness• Combustible Dust must be contained at
the source.
• A simple spark from a Forklift contacting a concrete floor, could set off an explosion.
• Static Electricity may also set off an explosion.
• Electrical systems need to be evaluated.
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On Thursday, October 7th, 2010, Static Electricity caused a dust explosion
• Witnesses reported that an employee was changing out dust collector bags when static electricity caused a dust explosion. There was a fire-ball and an employee in the immediate area sustained injuries.
• There was damage to the property and sprinkler heads had been activated.
• Employee was treated for minor burns to the top of his head.
•http://www.ksallink.com/?cmd=displaystory&story_id=14878&format=html
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IMC Technicians Performing High Surface cleaning of Dust
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Contain The Source!
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Accumulation of dust particulate buildup inside a filter chamber of an HVAC system.
Foot Prints
Why 1/32 of an Inch of Dust?• Any amount of Dust accumulation, on any surface
or piece of equipment, acts as an insulator.• This added insulation of dust may cause
manufacturing, electronics and other equipment to heat up and breakdown.
• Added insulation of dust may also cause Electric and Utility costs to increase and may cause Fire Suppression Systems to fail. Is that a high Return On your Investment?
• Insurance Companies require a clean facility and equipment to keep rates down and to ensure decreased liability from hazards.
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Combustible Dust and Tobacco Cans
Tobacco Cans
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Dust Collectors• Dust Collectors- designed to capture dust and
particulate at the source.• So why so much dust?
1) Broken or Leaking seals/gaskets
2) Clogged ductwork/piping
3) Filters and bags are clogged, torn, undersized, or “missing”
4) Not enough CFM pull, from exhaust fans
5) Preventative Maintenance Program/ Housekeeping is non-existent
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Diagram of Dust Collector
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Dust Collectors
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Laundry Drying?
Aluminum Dust in Exhaust System
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HVAC Systems
• HVAC Air Conveyance Systems- designed to filter and deliver conditioned air.
• So why so much dust in HVAC Systems?
1) Dust Collector and other production equipment emitting heavy concentrations of dust and particulate into the air.
2) Clogged ductwork/piping
3) Filters are clogged, undersized, not installed properly, torn or “missing”
4) Not enough CFM pull, from exhaust fans
5) Preventative Maintenance Program/ Housekeeping is non-existent
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HVAC System
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HVAC Rooftop Unit and Ductwork
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Paper Dust in Recycling Center- Office Area
Ceiling Tile
Batt Insulation
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Paper Dust-Above Office Space Areas
Ductwork
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Heat Exchanger
Lab Fume Hoods• Lab Fume Hoods- designed to remove carbon, smoke,
particulate, and vapors from lab workspaces.
• Why decreased draw or decreased face velocity?
1) Dust Collector emitting heavy concentrations of dust and particulate into the air2) Clogged Fume Hood, ductwork/piping 3) Filters are clogged, undersized, or “missing” 4) Not enough CFM pull, from exhaust fans5) Preventative Maintenance Program/ Housekeeping is non-existent
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Diagram of Lab Fume Hood
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Lab Fume Hood
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Heat Exchangers/Portable Heaters-Extremely Dangerous!
• Heat Exchangers and Portable heaters- designed to heat air in designated work area space.
• Motors need to be Explosion Proof!
• Safely Clean up Combustible Dust to prevent combustible event!
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Heat Exchanger
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Health Concerns and Indoor Air Quality, with Any Dust
• Lungs and heart- become congested, decreased blood flow to body. Many types of diseases and disabilities to occur, (Silicosis, Black Lung), short term and long term exposure, increase in Sick Days
• Eyes- unsafe working conditions, may lead to accidents, increase in Sick Days
• Fatigue- workers may decrease productivity, may lead to an accident, increase in Sick Days
• Insurance- Increase in Workmen’s Compensation, Short term and Long term disability, Increase in Liability insurance
• PPE- Increase use of proper PPE, may decrease sick days
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Combustible Dust on Conveyor Tray
What is This?
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Combustible Dust and Biohazard!
Dead Bird-and Droppings: Histoplasmosis,
Cryptococcasis and Combustible Dust!
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HEPA Vacuuming Combustible Aluminum/Titanium Dust on Horizontal Beam
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Maintenance Issues With Dust
• Lighting is decreased.
• More Electric or Power is required, as a result - Utilities are increased.
• Fire Suppression Systems may NOT activate, or have a delayed response!
• Decreased safety awareness, lower employee morale.
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Combustible Dust Covering Fire Suppression Head
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Combustible Dust and Exhaust Fans
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Motor needs to be Explosion Proof!
Combustible Dust Cleaning Per NFPA 654
• Prevent ANY Dust Clouds!
• Do NOT use Compressed Air!
• Do NOT Broom Sweep!
• Use Certified, Tested, HEPA Explosion Proof Vacuums!
• Foam Cleaning can be used, for Certain Dusts/Areas- (But NOT to be used for ANY Metal Dusts!)
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Treat All Dust as if they are Combustible Dust, Unless Tested!
• Have a Sampling of Dust Tested, for Kst Value!
• Chilworth Technologies provides Combustible Dust testing and consulting, and Static Electricity consulting.
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Interior Maintenance Company- For Your Combustible Dust Cleaning
Requirements• IMC has Proper Safety Training, and Experience, with ALL types of Combustible Dusts.
• IMC uses the Proper O.S.H.A. fall protection, including safety harness, lanyards, and Self Retracting Lifelines, along with use on Aerial Platforms.
• IMC has the Proper HEPA Filtered Explosion Proof Vacuums, to clean ALL types of Combustible Dusts.
• IMC uses the Proper PPE, protection, and materials, to prevent liabilities and risks.
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Clean Up the Dust Safely, and Go Home Safely!
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About IMCPlease contact IMC to provide a free estimate
regarding any of your combustible dust cleaning needs.
Jon Barrett can be reached at (267) 886-7903 or Email: [email protected]
He is Chilworth Technology trained for Dust Explosion Inspection and Cleaning, N.F.P.A.
and Fire Protection Research Foundation trained for Explosive Dust
Cleaning.
Thank you for your time and consideration!
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