Refinement of Disposal System Design Loads

Posted by Edgard Kurnia on Jan 11, 2019 10:59:15 AM

With more brownfield capital projects coming back to life...

...many operating companies are mobilizing to increase their facility's charge rates. If you are one of these companies looking for improvements, correctly evaluating your flare system's maximum capacity could "make or break" your project's feasibility studies.

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Topics: CAPEX, QRA, Quantitative Risk Assessment, Rate Increase, Flare Optimization, Feasibility Studies, Dynamic System Modelling, API 521, RAGAGEP, Disposal System Design, Overpressure Protection

Did You Know: Allowable Backpressure for a Conventional Valve...

Posted by Brandon Ring on Aug 1, 2018 5:51:00 PM


Did you know, the allowable total backpressure for a conventional valve can be larger than 10% of the set pressure? According to API 520-1 §

"In a conventional PRV application, when the allowable overpressure is 10%, the built-up backpressure should not exceed 10% of the set pressure. A higher maximum allowable built-up backpressure may be used for allowable overpressures greater than 10 % provided the built-up backpressure does not exceed the allowable overpressure."

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Topics: Did You Know?, Allowable Backpressure, PRV, Set Pressure, API 521, Spring Loaded Valves

Did You Know: Cold Differential Test Pressure (CDTP)...

Posted by Brandon Ring on Jan 1, 2017 5:55:00 PM


Did you know, under certain circumstances, you need to verify if the Cold Differential Test Pressure (CDTP) is properly compensated for the superimposed backpressure from the flare header?

Have you come across a conventional pressure relief valve relieving to a flare header? Did you know that, under certain circumstances, you need to verify if the Cold Differential Test Pressure (CDTP) is properly compensated for the superimposed backpressure from the flare header?

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Topics: Did You Know?, PRV, Pressure Relief Valves, Cold Differential Test Pressure, CDTP, Flare Header, API 521, Set Pressure, Relief Header

Case Study: Flare System Velocity Concern Review

Posted by Dustin Smith, P.E. on Nov 16, 2016 6:07:00 PM

The Opportunity:

After reading about flare header failures due to high velocities, an owner of a production platform in the Middle East wanted to ensure that the initial inerting/purging of the platform and pipeline would not result in flare header piping failure. Smith & Burgess was hired to review the flare systems for safe operation under the high flow rates associated with the initial facility start-up.

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Topics: Case Study, Flare Study, Flare System, Flare Management, Engineering Review, Flare Analysis, Flare Mitigation, Flare Optimization, Rate Increase, API 521, Detailed Engineering, Engineering Analysis

Did You Know: Liquid Service PSVs...

Posted by Brandon Ring on Jul 1, 2016 5:52:00 PM


Did you know, a relief device in liquid service does not always mean that the device is liquid-certified?

Liquid-certified devices are mechanically designed and sized by an engineer to relieve liquid. Per UG-125 of ASME Section VIII, "Vessels that are to operate completely filled with liquid shall be equipped with pressure relief devices designed for liquid service, unless otherwise protected against overpressure."

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Topics: Did You Know?, PRV, API 521, Pressure Relief Valves, Liquid Service PSV

 Safety Knowledge Should be Share...

“It should not be necessary for each generation to rediscover the principles of process safety which the generation before discovered. We must learn from the experience of others rather than learn the hard way. We must pass on to the next generation a record of what we have learned.” - Jesse C. Ducommun, Safety Pioneer
As Process Safety engineers and consultants, we believe our unique position creates a responsibility for Smith & Burgess to share our years of accumulated safety knowledge.

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