Bryan Haywood

API 520, Part II offers more guidance on “intervening valves” in a PRD path

I have shared the ASME and NBIC “code” requirements for these arrangements and it has already stirred a number of debates/questions; of which the API has offered some excellent guidance on this design. (emphasis by me)… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...

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The National Board on “intervening valves” in the PRV path (Car Seal)

It has grown tiresome, but it remains a teachable moment, to debate “engineers” who want part of ASME/NBIC to be the gospel and other parts not so much. The ammonia refrigeration industry just can’t seem to grasp the critical need in their “Common PRV Header Design” v.s. having more “holes in the roof” (as they…...

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Threaded Piping Connections and Hazardous Materials

Recently I was asked if “torquing” threaded pipe is required by code. I answered the inquiry by referring the client to ASME B1.20.1-2013, which states: 1.4 Sealing (NPT and NPSC Only)…1.4.3 Tightening Torque.Due to application-specific variables such as materials, wall thickness, operating pressures, etc., no guidance is given in this Standard regarding joint-tightening torque. However,…...

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Scrubbing the inside of a mix tank with Naptha using a Teflon bristle brush is not advised

Another incident where the lack of respect for static electricity and flammable atmospheres results in severe injuries. A Teflon bristle brush generates a lot of static electricity; coupled with the low flashpoint of Naptha (73F) and we have a serious hazard. At 5:30 a.m. on February 24, 2020, an employee, 42, was scrubbing interior surfaces…...

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Switch Loading + Static Electricity = Fatal Burns

FACT: Most flammable liquid vapors have a Minimum Ignition Energy (MIE) of less than 1 millijoule (mJ). Most of us do not even feel static which is less than 15 mJ. So the amount of energy necessary to ignite most flammable vapor atmospheres is not even observable by humans. At 6:15 p.m. on October 30,…...

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Welding on Diesel Tank results in fatality

At 2:45 p.m. on May 31, 2024, Employee #1, 39, was performing welding work on a diesel fuel tank. During the welding process, an explosion occurred, resulting in the employee’s fatal injuries. The explosion was caused by overpressure inside the tank, which caused metal parts to be ejected. Emergency services responded to the scene, but…...

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Learning Opportunity vs Discipline

There’s a massive difference that may require massively different approaches in how we respond to failures in administrative controls such as LOTO. Scenario #1: a worker with less than a year of experience, is tasked with isolating a PRCS that has 29 isolation points. It was his first time to do this isolation and was…...

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Safety Thought of the Week… Reason’s “Swiss cheese” model of accident causation

In memory of James Reason, I thought it would be fitting to share, in my professional opinion, one of the greatest safety models of my career. If businesses could just embrace this model when it comes to how they investigate events, we could move workplace safety forward a couple of decades. The model is quite

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Methane gas from well water caused the 2001 CA fatal water tank explosion

Back in June of 2021, a 1.5 million gallon water tank exploded just as a contractor began to perform hot work on it. Now most people would think a water tank would not have explosive properties; thus, the workers, nor the deceased contractor with 16 years experience, did not sample the atmosphere within the tank…....

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Hydrogen is used as a “refrigerant” @ power plants

A lot of folks may not know that Hydrogen gas is used as a refrigerant on generators at power plants. When I first started working on power plants in 2005, I was shocked at this practice and at how some plants managed these risks. I have never done work for the company involved in this…...

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