Smith & Burgess' Blog

Did You Know: PSV Isolation on Air Receivers

Posted by Brandon Ring on Jan 14, 2020 10:26:07 AM

 

Did you know, OSHA does not allow block valves on the inlet of relief valves installed on air receivers in compressed air systems?

OSHA CFR 1910.169(b)(3)(ii) states, “No valve of any type shall be placed between the air receiver and its safety valve or valves.”

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Topics: Did You Know?, Pressure Relief Valves, Detailed Engineering, OSHA, PRV, Relief System Design, Relief Header, Set Pressure, Exit Pipe Fitting

Did You Know: Set Pressure of PSVs Protecting Process Pipes

Posted by Brandon Ring on Jan 14, 2020 10:15:36 AM

 

Did you know, relief devices that protect process pipe may be set to open above the piping design pressure?

Per ASME B31.3-2016, Sections 322.6.3. (see Figure 1) and 302.2.4 (f) (see Figure 2), a thermal relief valve may be set up to 120% of the design pressure of the protected system with the owner’s approval, as long as, the allowable accumulation criteria in 302.2.4.(f) are met. Set pressures lower than 120% of the design pressure may be required depending on the allowable accumulation pressures in 302.2.4 (f).

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Topics: Did You Know?, Pressure Relief Valves, Detailed Engineering, PRV, Relief System Design, Relief Header, Set Pressure, Exit Pipe Fitting

New Decade’s Resolutions?

Posted by Brandon Ring on Jan 13, 2020 4:21:56 PM

"Great teamwork is the only way we create the breakthroughs that define our careers."

As we enter 2020, most of us have already taken a moment to reflect on last year's successes and failures. (At least on a personal level.) A somewhat painful and unavoidable exercise to help guide your decisions in the upcoming year.

However, how many have taken stock of our past decade's personal successes and failures? If you haven't, quickly give it a shot right now.

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Topics: PSM Review, Industry Compliance, Compliance, OSHA, SIL Design, SIS Design, PSM Audit, Regulatory Compliance, Gap Assessment, Relief System Design, Relief Systems Revalidation, Relief Valve Mitigation, Relief Header, Flare Header Analysis, Allowable Backpressure, Spring Loaded Valves, CAPEX, Disposal System Design, Dynamic System Modelling

The Journey to Peak Facility Safety

Posted by Brandon Ring on Feb 24, 2019 10:34:05 PM

Establishing and maintaining an effective safety culture is a symphony of challenges and moving pieces.

Too often, those responsible engineers are stretched thin with competing priorities. Smith & Burgess is here to help. Our culmination of Process Safety knowledge enables us to quickly provide our clients with practical solutions that lead to compliancesignificant cost-savings, and of course, peak facility safety.

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Topics: PSM Review, Industry Compliance, Compliance, OSHA, SIL Design, SIS Design, PSM Audit, Regulatory Compliance, Gap Assessment, Relief System Design, Relief Systems Revalidation, Relief Valve Mitigation, Relief Header, Flare Header Analysis, Allowable Backpressure, Spring Loaded Valves, CAPEX, Disposal System Design, Dynamic System Modelling

Did You Know: Vessels Riding on Flare...

Posted by Brandon Ring on May 1, 2017 4:53:00 PM

 

Did you know, When performing a flare header analysis, it is not uncommon to find pressure vessels that ride on the flare, i.e. they have an open path to the flare header?

These vessels are often degassing drums, maintenance knock out drums, or other similar equipment. While there are practically never any relief loads from these equipment contributing to the global scenarios we typically evaluate, it is still important to ensure that the pressure in the drum does not exceed the code allowable accumulation.

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Topics: Did You Know?, Pressure Relief Valves, Flare Header, PRV, Relief Header, Flare Header Analysis

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

Posted by Brandon Ring on Jan 1, 2017 4:55:00 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?, Pressure Relief Valves, Flare Header, API 521, PRV, Cold Differential Test Pressure, CDTP, Relief Header, Set Pressure

 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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