A Process Safety Management Company

Relief Systems

Relief Systems, Webinar

Introduction to Pressure Relief Systems.

Pressure relieving systems are an integral part of any process facility, from offshore production platforms to petrochemical complexes, and usually provide the last line of defense against overpressure and loss of containment. Although ubiquitous, pressure relieving systems are not necessarily well understood by all chemical process engineers.

In this webinar, you’ll receive an introduction (or a refresher!) to the fundamentals of pressure relieving systems including causes of overpressure, determination of relief loads, methods of pressure relief, and how these concepts are tied together by applicable industry codes, standards, and practices.



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Justin Phillips, P.E

Justin Phillips has over eight years of onshore and offshore oil & gas process engineering and project execution experience. His technical experience includes process design with specialty in flare and relief systems. Justin is the Relief Systems Line of Service Manager at Provenance Consulting, LLC. He holds a B.S. in Chemical Engineering from Texas A&M University in College Station, Texas and is a Licensed Professional Engineer in the State of Texas.

Whoops! I Made a Mistake Sizing My Relief Device and Then I Installed It Incorrectly!

Whoops! I Made a Mistake Sizing My Relief Device and Then I Installed It Incorrectly!


Relief Systems play a huge role in the world of Process Safety Management so it comes to no surprise that engineers have to pay very close attention when designing and installing them. But one word will always come up, “Mistakes.” Every engineer makes them; however, mistakes made when selecting, sizing and installing pressure relief systems can create risk. Provenance has teamed up with AIChE to bring you a free live webinar that will help you avoid risky relief system pitfalls.

This free, live webinar hosted by AIChE Academy, will take place on Wednesday, April 6th from 1:00-2:00 pm CST.  In this 60-minute webinar, we will discuss how improper design and installation can impact your safety as well as how to recognize and address common sizing, selection, and installation pitfalls early on.

Register Now


AIChE’s 2015 Spring Meeting and 11th Global Congress on Process Safety

Provenance Consulting is excited to share our involvement next week at AIChE’s Global Congress on Process Safety in Austin, TX. Provenance will be giving four presentations at the conference and will also be at booth #420 in the exhibit area – so please stop by and see us! Below is a brief summary of each presentation.

We look forward to seeing you in Austin!

Monday, 27 April

Can I Use My Cooling Water Header As a Relief Device?

Rahul Raman, 11:30am

The ASME BPVC is a well-recognized code of construction and allows pipe that discharges to the atmosphere as an acceptable pressure relief device. However, there are safety considerations and industry guidance that restrict the use of using a cooling water side of heat exchanger specifically as a relief device. This presentation interprets the landscape of existing regulatory framework to show the industry regarding the ways to use it as a relief device and the underlying assumptions for such use.

Overfilling Protection for Weak Tanks

Rahul Raman, 2:30pm

Weak tanks have relief valves that are typically sized for vapor/gas service. These tanks are subject to overflowing and collapse due to the pressure force. Minimal amounts of liquid is enough to over-pressurize the tank. Currently there is no industry guidance to size a relief device for such low pressure tanks. Furthermore, there is a lack of data from the manufacturers. Provenance has tag-teamed with PROTEGO® to establish a methodology and vetted it with experimental data. Using conventional available tools for engineers, we have developed a methodology to accurately predict the capacity within a +/- 10% error tolerance.

 Tuesday, 28 April

Developing Credible Scenarios for a PHA

Nestor Paraliticci, 2:30pm

OSHA’s Compliance Guidelines and Recommendations for the PSM Standard states “A PHA is an organized and systematic effort to identify and analyze the significance of potential hazards associated with the processing or handling of highly hazardous chemicals.” It goes on to say “A PHA is directed toward analyzing potential causes and consequences of fires, explosions, releases of toxic or flammable chemicals and major spills of hazardous chemicals.” OSHA does not give any additional guidance; they just refer you to 18 additional “Sources of Further Information”. So rather than spending your free time reading these books, I would like to present a process on how to develop scenarios (causes and consequences), tips on creating credible and realistic scenarios and the pitfalls to avoid during the process, commonly encountered during a PHA .

Wednesday, 29 April

Guidance for Sizing Relief Devices That Are Installed below Liquid Level in an External Fire

Rahul Raman, 8:30am

A fire impinging on a pressure vessel results in boiling up of the liquid and generates vapor that needs to be relieved though a pressure relief valve. Due to geometry or maintenance reasons a relief valve can be installed below the liquid level. In this scenario the vapor pushes hot saturated liquid and has a potential to flash as it flows across the relief system piping. This paper gives the guidance to size relief valve that are installed in such service.

Overpressure Protection and the Relation to Regulations, Codes, and Standards

Most professionals in the industry understand the fundamental importance of overpressure protection and the basics of pressure relief valves. However, many cannot dedicate the time to understand the history or intricacies of overpressure protection implementation. For instance, what can we consider to be a “relief device” and where do we look to be certain?

Join Justin Phillips — a relief systems engineer from Provenance Consulting — to gain a better understanding of pressure relieving systems. This free live webinar takes place on Wednesday, April 22 2015, from 1:00 – 2:00pm CST.

In this webinar, the audience will be given a roadmap that links regulatory requirements to codes of construction onto industry practices and standards. By linking these things together, the audience will be better able to understand the philosophy of regulations and will be able to reference the appropriate regulations and code requirements readily.

If you are an engineer or technical professional working with pressurized vessels, boilers, this is your opportunity to better understand the Whys and Hows of overpressure protection.

To register for the AICHE hosted event, follow the link here.


Selected Pressure Relief Systems Heuristics Live Webinar

Please join Provenance on Wednesday, 27 August 2014 at 1:00pm CST for our last AIChE-hosted webinar of 2014! As an extension to the January relief systems presentation, this webinar will highlight heuristics for a few common overpressure scenarios including blocked pump outlet, low-pressure vent piping losses, fire relief, and more.

Estimating relief loads for pressure relieving systems is usually straight-forward with clear guidelines provided in company standards and elsewhere. Regardless, sometimes the correct technique is not applied, which can lead to gross under- or over-estimation of required relief rates and capacities even for the most common overpressure scenarios.

If you are interested in attending simply register here. To ensure that you receive the log-in information the morning of the webinar, please sign up at least one day in advance.