Combustible Dust Testing

Laboratory testing to quantify dust explosion & 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

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 (DSC/ARC supplies, CPA, C80, Super Stirrer)

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.

Acoustic Analysis - Flow Induced Vibration

Acoustic analysis is the study of various acoustic phenomena in piping and structural systems that can result in acoustic induced vibration due to acoustic exciters such as valves, ducts, and cavities (shallow or deep).Acoustic analysis is necessary to identify any potential sources of acoustic induced vibration in a given system and design a solution to mitigate the potential effects, typically failure through fatigue.  Acoustic resonance is the main phenomena of concern and it is induced by a gaseous fluid flow, typically but not limited AcousticHarmonics.pngto air or steam. Issues that result from acoustic phenomena have been observed in power (nuclear, fossil), oil and gas and industrial systems. Acoustic resonance can lead to flow induced vibration. Different acoustic phenomena often present themselves in systems and go unnoticed until there is a failure in the system. Examples of acoustic phenomena are column resonance, Helmholtz resonance and trapped mode acoustics.

Illustration of vortex shedding (an acoustic resonance exciter) across a valve cavity and the acoustic pressure waves that result; these waves can act as loads on components in a system and lead to cyclic fatigue failure. 


It is essential to understand the potential for acoustic resonance issues when designing a new system or upgrading an existing system especially if the system failure is a safety concern or if the system failure could affect productivity. It is also recommended when a system with potential excitation sources was designed without acoustic phenomena taken into account or when a system is being upgraded.

Fauske & Associates, LLC (FAI) studies acoustic resonance issues using acoustic analysis to screen and analyze subject systems as well as experiments if necessary to verify the results.


Samad_Pipe Clamp InstallationFAI has a broad range of expertise in this area gained from working on acoustic resonance issues in the nuclear, fossil and chemical process industry.  Our screening analysis and tests address key issues including: 

  • Identification of systems that have potential excitation sources
  • Determining if a system failure with potential sources was actually caused by acoustic resonance
  • Satisfaction of industry regulatory guide or standard requirement such as those included in the Nuclear Regulatory Commission (NRC) Reg. Guide 1.20 

You can obtain mode shapes using the co-quad and global least squares method

Learn More