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.

Adiabatic Calorimetry Testing

Adiabatic calorimetry testing provides data for emergency relief system (ERS) design, safe scale-up of chemical processes, safer process design, and safe transport and storage.  Safe design requires knowledge of chemical reaction rates, character and energy release - all of which can be obtained from a low thermal-inertia adiabatic calorimeter such as the VSP2 (Vent Sizing Package 2) or ARSST (Advanced Reactive System Screening Tool). Accelerating Rate Calorimeter (ARC) testing typically has higher thermal inertia and the measured reaction rates are limited and not directly scalable for vent sizing, however the ARC does provide good data for kinetic modeling and thermal stability analysis. A well-equipped process safety lab has all three of these instruments. 

The VSP2 and the ARSST measure temperature and pressure under process upset conditions. Adiabatic temperature rise and evolved gas pressure are measured, but of particular importance are the rates of temperature and pressure rise which yield in turn the volumetric rates of vapor and gas generation which must be accommodated by a pressure relief system. (The VSP2 can also be configured to simulate two-phase venting which can occur due to liquid entrainment, and which must be considered when doing vent sizing.) A variety of process upset scenarios can be directly simulated to quantify hazards identified by a PHA or HAZOP study. 

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Testing Services

VSP2 (Vent Size Package 2) Testing

Best suited for simulating abnormal process "upset" conditions to collect directly scalable data suitable for vent sizing.


The VSP2 is a robust and customizable low thermal inertia calorimeter capable of simulating a variety of unintended process scenarios, including:

  • Loss of cooling or agitation
  • Accumulation or mischarge of reactants
  • Contamination of batch
  • Thermally initiated decomposition

Versatile test design makes it easy to study details like resident incubation time and allows for in-situ liquid/gas dosing or sampling 


Use of the VSP2 can help users obtain complete chemical system data:

  • Low thermal inertia testing allows data to be directly applied to process scale

  • Temperature and pressure rise rates applicable to relief system design are "Based on DIERS two-phase flow technology, recognized by OSHA as an example of “good engineering practice”
  • Many testing configurations
    -    Solids, liquids or two-phase mixtures
    -    Closed or open (vented) tests
    -    Scaled blowdown simulation
    -    Test cells are available in 304 & 316 SS, Hastelloy C, Titanium, and glass-lined

  • Accurate adiabatic data 
    -    Onset temperature
    -    Total adiabatic temperature rise (ΔTad)
    -    Heat of reaction or mixing
    -    Vapor pressure data 
    -    Time-to-maximum-rate (tmr)
    -    Self-accelerating decomposition temperature (SADT)
  • Relief valve sizing

  • Quench tank design

  • Effluent handling

  • Critical temperature

  • Effect of two-phase flow
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ARSST (Advanced Reactive System Screening Tool) Testing

Best suited for gas-generating systems, companies with limited sample quantities, and for quickly screening for adverse reactions.

The ARSSTTM enables users to quickly obtain reliable adiabatic data which can be used for a variety of safety applications including characterization of material compatibility, thermal stability and reaction chemistry.  Test data includes adiabatic rates of temperature and pressure change which, due to the low thermal inertia, can be directly applied to process scale to determine relief vent sizes, quench tank designs and other relief system design parameters related to process safety management.

  • Small sample size
  • Open or closed testing (obtain vapor pressure data from closed cell testing)
  • Quickly screen new and existing processes for thermal hazards
  • Scanning and isothermal modes
  • Reliable results for thermal hazard assessments
  • Lightweight glass test cell with good mixing
  • Easy setup for fast test turnaround
  • Obtain complete chemical systems data:
    -    Critical temperature
    -    Kinetic parameters

  • Estimate process safety parameters including:
    -    Onset temperature
    -    Temperature & pressure rise rates
    -    Adiabatic temperature rise
    -    Heat of reaction and mixing
    -    Tempering temperature
    -    Time to maximum rate (tmr)
    -    Self-accelerating decomposition temperature (SADT)

  • Vent sizing

  • Emergency relief system design

  • Accommodates handling of energetics and pyrotechnics

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Accelerating Rate Calorimeter (ARC) Testing

Best suited for identifying potential thermal hazards and early conversion kinetics.

The high thermal inertia adiabatic calorimeter that is used to obtain data regarding the relationships between time, temperature, and pressure for exothermic reactions. The following safety parameters are attained, or can be evaluated, from Accelerating Rate Calorimetery:

  • Onset temperature

  • Temperature rise rate dT/dt as a function of temperature

  • Pressure rise rate dP/dt as a function of temperature

  • Adiabatic temperature rise (ATR)

  • Heat of reaction

  • Adiabatic time to maximum rate (TMR)

  • Temperature of no return (TNR)

  • Self-accelerating decomposition temperature (SADT)

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Related Services

Reaction or Adiabatic Calorimetry: Which Testing Method is Right for Me?

Adiabatic Calorimetry - Resources

Advanced Reactive System Screening Tools (ARSST)
ARSST Experiments to Evaluate Solvent Compatibility with Stabalized Lithium Metal Power
An Alternative Methodology Addressing United Nations Classification Type for Self-Reactive Substances
A Practical Approach to Capacity Certification
Determination of Two-Phase Flow Regimes and Presure Relief Sizing
Emergency Relief System Design for Reactive and Non-Reactive Systems: Extension of the DIERS Methodology
Case Study: Using Low Thermal Inertia Adiabatic Calorimetry Data with AKTS-Thermokinetics Software
The Versatile VSP2 – Still Cooking After 26 Years