Hazards Analysis, Code Compliance & Procedure Development

Services to identify process safety hazards and facilitate compliance with established standards and codes.

Combustible Dust Testing

Laboratory testing to quantify dust explosion and reactivity hazards

Flammable Gas & Vapor Testing

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Chemical Reactivity Testing

Laboratory testing to quantify reactive chemical hazards, including the possibility of material incompatibility, instability, and runaway chemical reactions

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Fauske & Associates fulfills the requirements of ISO/IEC 17025:2017 in the field of Testing
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 safety handle the effluent discharge from an overpressure event

Thermal Stability

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


Classification of hazardous materials subject to shipping and storage regulations

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents


Model transport of airborne virus aerosols to guide safe operations and ventilation upgrades


Model transport of contamination for source term and leak path factor analysis

Fire Analysis

Model transport of heat and smoke for fire analysis

Flammable or Toxic Gas

transport of flammable or toxic gas during a process upset

OSS consulting, adiabatic & reaction calorimetry and consulting

Onsite safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up

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Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid flow, electric power systems

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

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Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen

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Safety analysis for packaging, transport, and storage of spent nuclear fuel

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Bespoke testing and modeling services to validate analysis of DD&R processes

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Expert analysis of possible risk and consequences from nuclear plant accidents

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Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

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Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

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Testing and modeling services to support resolution of emergent safety issues at a power plant

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

Published April 3, 2014

Combustible Dust Basics, Part 2: What Testing Do I Need?

MIE ChamberBy Zach Hachmeister, Director of Operations, Fauske & Associates, LLC

A large majority of our clients seek out dust explosion testing for two reasons – one, to obtain data specifically for the installation/modification of equipment and two, for compliance purposes.  Regardless of the driving factor, the first step in this exercise is to identify if your material in question is indeed combustible.  In the first part of our series, "Combustible Dust Basics, Part 1: What does a Go/No-Go Test Mean?", we discussed how this can be achieved through conducting a screening test, or Go/No-Go test, on a representative sample of the material.  If the test result indicates that the material is combustible, two other general questions should come to mind:  1) How bad can it be and 2) under what circumstances can my dust combust? 

Question 1: How bad/energetic can it be?

The folks seeking data for the installation or modification of equipment are often most interested in the “how bad can it be?” aspect and want to know the KSt and Pmax values for their material.  The KSt is deflagration index of a dust cloud (the maximum rate of pressure rise normalized to a cubic meter) and the Pmax is maximum overpressure.  These two parameters are used to quantify how energetic a dust explosion of a given material can be and can be ascertained through an Explosion Severity Test.  The reason people are interested in this data is so they can incorporate a mitigation strategy, such as explosion relief venting, into the design of the equipment that is capable of handling the full explosive potential of the dust.

Question 2: Under what circumstances can my dust combust?

We are also frequently contacted by people who are seeking data for compliance purposes.  Often this is at the urging of an AHJ (Authority Having Jurisdiction).  It might be OSHA (Occupational Safety and Health Administration), a building inspector, insurance companies, fire departments - or just the building owner, upper management and other employees.  In addition to the Explosions Severity test, these inquires usually include a variety of other tests such as Minimum Ignition Energy (MIE) and Minimum Autoignition Temperature (MIT).  The goal of obtaining this additional data is to allow for a better understanding of the risks associated with handling the material in question.  By having an understanding of the ignition energies, temperatures, and concentration of dusts you can identify and address areas within the process that are more susceptible to an explosion event. 

Fauske & Associates, LLC (FAI) offers a wide range of services related to characterizing, preventing and mitigating combustible dust explosion and fire hazards. These services include combustible dust testing, onsite assessments, OSHA compliance assistance, audit preparation, training, ignition source evaluation and vent sizing calculations.  Testing is completed on-site in our state of the art dust testing facility per ISO 17025 guidelines.  A portion of the testing services we offer is shown in the table below.

If you are in the process of characterizing your dust, upgrading your existing dust collection system, or planning on investing on a new one, contact us for an analysis of your dust and application. Representative dust samples for the application must be gathered in a very specific way.  For more help, read "How To Collect and Ship Combustible Dust Samples For Testing" or contact us first for instructions and authorization.

Look for our final installment of this 3-part series next week with "Combustible Dust Basics, Part 3:  What is Overdriving?"  


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