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.

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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

Hartmann Tube for Combustible Dust Screening

Posted by Fauske & Associates on 04.24.15




This example illustrates a combustible dust cloud explosion pre-screening test. This test is performed based on procedures from VDI 2263, Part 1 (Section 2.1.1), “Dust fires and dust explosions; hazards, assessment, protective measures”, using a Modified Hartmann Apparatus with a 10 J AC electric arc. The material tested here is a fine metallic powder which was determined to have an Explosion Severity ratio of 0.4 – based on subsequent testing. The pre-screening test in the Modified Hartmann Apparatus is a precursor to the standard explosion screening test conducted per ASTM E1226 Section 13. Both tests, when used in conjunction, can be used as a tool to ascertain if a given sample of dust poses an explosion risk if suspended into a cloud in air in the presence of an ignition source.

Fauske & Associates (FAI) performs explosion tests every day using our Hartmann Dust Testing apparatus (we actually have several instruments running in parallel). The practicality of this device is its simplicity to test and determine if a process dust should be classified as combustible. Applications include, but are not limited, to combustible testing of floor and process samples per NFPA 654/OSHA CPL 03-00-008, R&D, process development, and commercial scale-up of starting materials, isolated intermediates and final products, including final packaged forms with excipients. The data can be used internally or shared using Material Safety Data Sheets. The device conforms to EU and UN test requirements, and it only uses a very small sample size (0.3 - 3.0 grams).

The modified Hartmann apparatus consists of a dispersion cup, a PTFE tube holder and a glass tube with a volume of 1.0 liter. By means of pressurized air a quantity of the powder sample is suspended in the presence of an ignition source. The ignition source used for the tests is a continuous spark generated by a high voltage transformer between two standardized electrodes placed near the bottom of the cylindrical tube. The energy content of the spark corresponds to an equivalent energy of about 10 Joule of a discharge spark.

Powder concentrations in air are between 30 mg - 3000 mg/liter (30 - 2500 g/m3). A powder is considered to be explosible if dust fires or explosions are observed during the tests. If no dust fires or explosions are observed in three-series of tests for any concentration, the powder is considered to be not explosible under the conditions of the test.

If you suspect you have a process that contains combustible dust, it would be prudent to contact us for dust screening advice.  We would be happy to help you evaluate your dust hazards, so please contact us at


Topics: Combustible Dust


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