Emergency Relief System Design

Reducing costs and increasing accuracy in the design or revalidation of relief systems.

Effective Emergency Relief System (ERS) design helps companies meet risk-management goals, compliance requirements, and sound business practices. ioMosaic provides a total ERS solution with our comprehensive ERS design services, from reactivity testing for design basis determination to calculations for Z-axis deflection from dynamic loads.

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How We Can Help You

Our team has decades of experience performing PRFS analysis and design.

Our risk-based approach helps mitigate near-unventable scenarios to a tolerable level of risk.

Better evaluate hazards in your facility with an accurate process simulation.

Delivering properly designed pressure relief systems that save both money and time.

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Our Viewpoint

 

Empowering Process Safety Management for Bioethanol

According to OSHA, PSM is one of the most frequently cited hazards at ethanol plants.

Ethanol manufacturing is a hazardous business, from highly flammable ethanol and chemical additives, to explosive grain dust feed stock. Determining and mitigating hazards for the energy industry is our specialty.

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Our Team

Georges A. Melhem, Ph.D., FAIChE

President & CEO The founder of ioMosaic and internationally renowned expert in the areas of pressure relief and flare systems design, chemical reaction systems, process safety and risk analysis. Read more...

Neil Prophet

Senior Partner Pressure relief and flare systems design project management and engineering expertise for chemical, pharmaceutical and petrochemical companies. Read more...

Daniel Nguyen, PE & PMP

Senior Partner & CTO Responsible for a team of software engineers in the development of ioMosaic’s PSO software and manages pressure relief and flare systems evaluation and design projects. Read more...

John Barker, Ph.D.

Regional Manager The leader of our U.K office and an expert in risk management for the international oil and gas and transportation industries. Read more...

Marcel Amorós-Martí

Senior Safety and Risk Management Consultant The head of our California office is experienced in pressure relief and flare systems design projects for chemical, petrochemical, oil & gas and utilities industries. Read more...

Katherine Anderson, CCPSC

Principal Consultant Experienced project leader in hazard identification, evaluation, functional safety, process safety and risk management. Read more...

Charles Lea, P.E.

Principal Consultant Oversees our Minneapolis office and has significant experience in pressure relief and flare system design. Read more...

Gemma Dunjó, Ph.D.

Manager of Environmental Services Expertise in environmental auditing, HSE regulatory compliance, environmental modelling, environmental impact reports (EIR) and safety and risk management. Read more...

Featured Videos

Featured Case Studies

Fire Exposure and Relief Protection for Vessels Containing Reactive Chemicals

The client was storing reactive materials in vessels that could be subject to fire exposure. They wanted to be sure that the relief protection on the vessels was correctly sized, or if not, what changes were necessary for an effective relief system.

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A refinery approached ioMosaic for the purposes of ensuring that pressure relief capacity was adequate for the loss of liquid seal scenario in a high-pressure separator (2,000 psig). They were also concerned about the pressure waves that would occur in the high-pressure separator’s outlet lines on rapid closing of the isolation valves and sought our expertise.
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A large oil refinery with a very complex flare network had become so complex that the tools the refinery was using to evaluate the flows through the flare network could not adequately model the system. Management no longer had confidence that their model results reflected the actual network performance and therefore, could not be sure the system would perform properly in the event of a global relief scenario at the facility.
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A multinational energy company wanted to complete an evaluation of a PRV system in order to comply with the PSM standard OSHA 29 CFR 1910.119 which requires that employers compile information pertaining to the equipment in the process, including relief system design and design basis. 
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Featured Resources

The Anatomy of Liquid Displacement and Vapor Breakthrough

The loss of High Pressure (HP) / Low Pressure (LP) interface has to be evaluated in order to (a) ensure that the downstream equipment can handle the energy and/or mass accumulation and (b) to also ensure that the upstream equipment can handle the rapid depressurization. The loss of the HP/LP interface can occur as a result of automatic controls failure/malfunction, and/or inadvertent valve opening / human error as seen in Figure 1. Potential outcomes of the loss of the HP/LP interface include but may not necessarily be limited to:

1. Overfilling of the downstream equipment, i.e. as the liquid is displaced from the upstream equipment into the downstream equipment.

2. High temperatures associated with the rapid compression of the vapor space of the downstream equipment associated with liquid displacement.

3. Multiphase flow associated with increasing liquid level, liquid entrainment, and/or high superficial vapor velocities caused by pressure relief device actuation in the downstream equipment.

4. Low temperatures caused by rapid depressurization in the upstream equipment and ultimately in the downstream equipment as pressure is further reduced when the gas breaks through to the downstream equipment.

5. Possible hydrate formation in the upstream and / or downstream equipment.


Featured Services

Pressure Relief and Flare System Design

Our risk-based approach helps mitigate near-unventable scenarios to a tolerable level of risk and develop economical designs for more credible events. Read more...

Relief Header and Flare Analysis Systems

Delivering properly designed pressure relief systems for refineries and chemical plants that save both money and time. Read more...

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