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

ISO Accreditation and Scope
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

Mechanical, Piping, and Electrical

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

Battery Safety

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

Hydrogen Safety

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

Spent Fuel

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

Decommissioning, Decontamination and Remediation (DD&R)

Safety analysis to underpin decommissioning process at facilities which have produced or used radioactive nuclear materials

Laboratory Testing & Software Capabilities

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

Nuclear Overview

Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant.

Severe Accident Analysis and Risk Assessment

Expert analysis of possible risk and consequences from nuclear plant accidents

Thermal Hydraulics

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

Environmental Qualification (EQ) and Equipment Survivability (ES)

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

Laboratory Testing & Software Capabilities

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


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

My Three Favorite New Features in FERST

Posted by Elizabeth Raines on 01.05.21

By Elizabeth J. Raines, Chemical Engineer, Fauske & Associates, LLC

Fauske Emergency Relief System Tool (FERST) powered by CHEMCAD

As an engineer in Fauske & Associate’s Thermal Hazards Group, I am fairly well versed in the area of emergency relief system design; and I am certainly aware of some of the aspects that make it, at times, difficult and time consuming. When my colleagues announced the development of our new tool, FERST powered by CHEMCAD, I can honestly say our team was ecstatic. I want to share with you a few of my current favorite aspects of this software that has made emergency relief system design much easier (they say you should always work smarter not harder, right?!).

1 - Built-in DIPPR Material Properties


FERST powered by CHEMCAD allows the user to input user-specified material properties (helpful when relieving materials are unusual or exact experimental data on the material properties are available). FERST can now automatically generate the required material properties at the relieving conditions based on user selected components. This is an excellent f

eature, and it allows me to rapidly determine the effect of changing the set pressure on the relief requirements or to determine the worst-case venting situation. FERST powered by CHEMCAD uses the most up-to-date DIPPR database for the pure component properties and pro

vides many different thermodynamic and mixing models for mixtures or materials with unknown properties.

2 - Clear Outputs for Describing New Relief System Designs

If a new relief system design is your goal (whether that means a new build or maybe you are moving vessels and need new or alternative relief piping), the Design output of FERST is going to be a huge help. This mode of FERST operation utilizes the Leung-Omega methodology with the most recent Leung-Omega correlation and a single set of equations to determine the mass flux for hybrid, gassy, or vapor systems. The solution to these governing equations provides the ideal vent area required. This means that in a perfect world without any frictional losses, this is the required flow area of your relief vent in order to protect your vessel from over pressurization.

Since frictional losses will always be present, FERST takes the results a step further and provides recommendations for the relief vent you should actually install. If you select a rupture disk, FERST will let you know what the actual relief orifice area should be, and the maximum amount of frictional losses (i.e., velocity head losses) you can install in the relief vent. If you are interested in installing a pressure relief valve, FERST will tell you what API orifice size you need, as well as the estimated maximum amount of inlet and outlet frictional losses your relief system valve can accept to satisfy the 3% inlet pressure loss and built-up backpressure requirements. This is an easy first step for any new design.

3 - Easy Evaluation of Existing Relief Systems AND Clear Outputs for Downstream Effluent Handling Parameters

There are many different situations where you need to evaluate the adequacy of an existing relief system; for example, when performing new chemistry in an existing vessel, switching vessels to increase capacity, making a process change, if a new upset scenario was identified during a PHA, after acquisition of a new plant, etc. Luckily, with FERST’s Rating mode, it is easy to input the information of a currently installed relief device (for either a rupture disk or relief valve) as well as information on the relief piping.

The output file provides the expected maximum pressure your vessel will experience for this scenario. This allows you to compare this pressure to the maximum allowable accumulated pressure (MAAP) to determine the adequacy of your relief system. Besides this crucial piece of information, the FERST output also provides key parameters (e.g. peak temperature, discharge two-phase density, discharge mass flow rates and flux, etc.) that you can easily use to evaluate additional downstream elements such as flares, quench tanks, knockout tanks, or for completing structural analysis on the relief piping.

3fav2Our team is constantly working to improve the software and bring in even more exciting features to FERST, and all of these updates are included! Some of the features I am most looking forward to are dynamic vessel venting and the capability to model  multiple vessels venting simultaneously. Please contact us for a demo!

Reach out to the Thermal Hazards group for any of your relief system design needs or to learn more about FERST powered by CHEMCAD. 

Contact us for more information!



Is My Dust Combustible?

A Flowchart To Help You Decide
Download Now