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


Our highly experienced team keeps you up-to-date on the latest process safety developments.

Process Safety Newsletter

Stay informed with our quarterly Process Safety Newsletters sharing topical articles and practical advice.


With over 40 years of industry expertise, we have a wealth of process safety knowledge to share.

Recent Posts

Testing Dangerous Goods With The Koenen Test Apparatus

Posted by Fauske & Associates on 07.28.15

By Amy Paul, Mechanical Engineer, Fauske & Associates, LLC

Flammability Testing: Koenen Testing Service

The Flammability Testing and Consulting Services department at Fauske & Associates, LLC (FAI) has increased our testing scope once again. We are now able to offer Koenen Testing. This test is used to measure the sensitivity of a solid or liquid sample to intense heat with varying confinement.

The Koenen Test apparatus at FAI meets the requirements for test methods listed in the United Nations’ Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria and the European Parliament’s Council on the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH).  In the UN Manual, the Koenen test methods are Test 1(b), Test 2(b) and Test 8(b), while the test method in REACH is A.14 Explosive Properties found in the Official Journal of the European Union. Based on the test results from these procedures, shippng classifications can be determined as well as the limiting diameter.  

Koenen Test Apparatus Figure 1: Koenen Test Apparatus

The sample is placed in a non-reusable tube with a reusable collar fitted with a standard orifice plate ranging from a 1 mm diameter up to a 20 mm diameter, through which the decomposition gases are vented. The tube assembly is then placed in the Koenen Test Apparatus, which is contains four propane burners housed in a support frame which encloses the test tube on three sides and the bottom. The tube assembly is then exposed to direct heat from the four burners until the tube ruptures or five minutes have expired, whichever comes first. The results of the test are based on how and if the tube ruptures during testing and at what orifice size.


Tube pre-test

Figure 2: Tube pre-test

Possible effects of heating under confinement according to the Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria:
“O”: Tube unchanged
“A”: Bottom of tube bulged out
“B”: Bottom and wall of the tube bulged out
“C”: Bottom of tube split
“D”: Wall of tube split
“E”: Tube split into two fragments
“F”: Tube fragmented into three or more mainly large pieces which in some cases may be connected with each other by a narrow strip
“G”: Tube fragmented into many mainly small pieces, closing device undamaged
“H”: Tube fragmenting into many very small pieces, closing device bulged out or fragmented

Tube that underwent effect “A”
Figure 3: Tube that underwent effect “A”
Figure 4: Tube that underwent effect “D”
Figure 5: Tube that underwent effect “E”
Figure 6: Tube that underwent effect “F”

Figure 2 through Figure 6 are pictures of results we typically see at FAI. Tests that result in “O” to “E” effect are regarded as “no explosion” according to the UN standards. UN Division classifications are made based on results with a limiting diameter- the largest diameter of the orifice plate used which results in an explosion.

The REACH method for thermal sensitivity uses the 6.0 mm and 2.0 mm diameter orifice plate. Classifications are based on whether or not an explosion occurs at either of these conditions. This test is part of the Explosive Properties test series, which includes tests to determine mechanical sensitivity with respect to both shock and friction. 

For more information regarding the testing of flammable liquid, gasses or vapors, combustible dust or other facility safety and process safety testing or management, please email

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