Combustible Dust Testing

Laboratory testing to quantify dust explosion and reactivity hazards

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Gas and Vapor

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Classification of hazardous materials subject to shipping and storage regulations
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Thermal Stability

Safe storage or processing requires an understanding of the possible hazards associated with sensitivity to variations in temperature

Adiabatic Calorimetry
Data demonstrate the consequences of process upsets, such as failed equipment or improper procedures, and guide mitigation strategies including Emergency Relief System (ERS) design
Reaction Calorimetry
Data yield heat and gas removal requirements to control the desired process chemistry
Battery Safety

Testing to support safe design of batteries and electrical power backup facilities particularly to satisfy UL9540a ed.4

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Cable Testing
Evaluate electrical cables to demonstrate reliability and identify defects or degradation
Equipment Qualification (EQ)
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Water Hammer
Analysis and testing to identify and prevent unwanted hydraulic pressure transients in process piping
Acoustic Vibration
Identify and eliminate potential sources of unwanted vibration in piping and structural systems
Gas & Air Intrusion
Analysis and testing to identify and prevent intrusion of gas or air in piping systems
ISO/IEC 17025:2017

Fauske & Associates fulfills the requirements of ISO/IEC 17025:2017 in the field of Testing

ISO 9001:2015
Fauske & Associates fulfills the requirements of ISO 9001:2015
Dust Hazards Analysis
Evaluate your process to identify combustible dust hazards and perform dust explosion testing
On-Site Risk Management
On-site safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up
DIERS Methodology
Design emergency pressure relief systems to mitigate the consequences of unwanted chemical reactivity and account for two-phase flow using the right tools and methods
Deflagrations (Dust/Vapor/Gas)

Properly size pressure relief vents to protect your processes from dust, vapor, and gas explosions

Effluent Handling

Pressure relief sizing is just the first step and it is critical to safely handle the effluent discharge from an overpressure event

FATE™ & Facility Modeling

FATE (Facility Flow, Aerosol, Thermal, and Explosion) is a flexible, fast-running code developed and maintained by Fauske and Associates under an ASME NQA-1 compliant QA program.

Mechanical, Piping, and Electrical
Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid, flow, and electric power systems
Hydrogen Safety
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Thermal Hydraulics
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Nuclear Safety
Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant
Radioactive Waste
Safety analysis to underpin decomissioning process at facilities which have produced or used radioactive nuclear materials
Adiabatic Safety Calorimeters (ARSST and VSP2)

Low thermal inertial adiabatic calorimeters specially designed to provide directly scalable data that are critical to safe process design

Other Lab Equipment and Parts for the DSC/ARC/ARSST/VSP2 Calorimeters

Products and equipment for the process safety or process development laboratory


Software for emergency relief system design to ensure safe processing of reactive chemicals, including consideration of two-phase flow and runaway chemical reactions


Facility modeling software mechanistically tracks transport of heat, gasses, vapors, and aerosols for safety analysis of multi-room facilities


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Published September 7, 2017

Combustible Dust Hazard Analysis (DHA) Sample Prep and Screening


Video transcript

HI I'm Mark, and this is Deb. We're with Fauske & Associates. Our sample has arrived at the lab and we're ready to test. Hold on a minute, Mark. Before we get started, make sure we have safety glasses on any time we're in the lab. Thanks Deb, let's do this. The customer that sends the material to us lets us know whether they want it tested as received or per the ASTM recommended standard of less than 75 microns. Remember, if you're not testing for the recommended 75 microns, you may be producing explosion sensitivity data that is not conservative enough to design your protection. So let's take a look at the samples that have come in; some the wrong way, others the right way. When we received the material, we want to have it be light, fluffy material, things that are gonna stay lofted in the air.

Some examples that show up in our lab that think we can test is something like this. That's not going to work. We've had some samples that arrived just loosely in a box and that's not going to help anyone, especially the paperwork that's inside. Ideally you want your sample to come in a container that is unbreakable and has a screw top lid with little chance for moisture to get into the sample.

Here's an example of proper packaging for a sample. Plastic bottle, secure screw tight lid, clearly labeled with the name of the company, the contact, the sample name and any special instructions that the client might have. Now we can make our way into the prep lab and get our sample ready for testing per the instructions of the customer. We can prep your material in a number of different ways, one of which is sieving for this 200 mesh screen to achieve your minus 75 microns.

We can grind it. We also check the moisture content of the material. ASTM recommends testing at less than 5%. Now that our sample is prepped, we can go into the testing lab and see if it explodes. The first step is to determine if the material is explosible, which is also known as a go/no-go test. Our initial testing starts with a modified Hartman tube. This will expose the material to a 10 joule constant arc ignition, so if the material is explosible here, it most likely will explode in the 20 liter chamber. A go result allows us to immediately move the material to the section of the lab that can tell us under what conditions the material will react. The other portion of the screening package, the combustibility screening test, this will determine if the material will support a flame while in a pile. If your facility has hot atmospheres from ovens or heavy machinery, this is a good test to consider.

Keep in mind, even with the no-go resolve of your exposability test, you may still have combustion concerns. Now that we have prepped and screened our sample for combustibility and explosibility issues, we're ready to move on to the next phase of the process. The Fauske onsite service team is available to come to your facility or just help you with the next phase of the process and decide on what testing is now needed. Fauske & Associates is here for you to serve your process safety needs. Let us know how we can be a resource.

Fauske & Associates, world leader in nuclear and chemical process safety.

If you are interested in learning more about dust hazard analysis, check out FAI's pdf on our 3 step approach to DHA.

3 Step Approach To Dust Hazards Analysis (DHA)  

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