Chemical Process Safety (PSM/RMP)

3-Way Valve under Hydrostatic RV?

Processes that handle Liquified Pressurized Gases are required to have Hydrostatic Relief Valves on liquid piping where the liquid can be trapped. Much like vapor/gas phase Pressure Safety Valves, it is frowned upon when we have an intervening valve under the PSV. However, many codes today ALLOW us to install a 3-way valve below the

Temporary SOP or a Car-Seal or Both?

The arrangement below is very common in processes/systems. This simple yet common arrangement causes havoc in hazard analyses. As the title states, is this arrangement managed with a Temporary SOP, a Car-Seal, or Both? The issue is that the motorized valve is tied to a Hi-Hi level alarm and interlock. When the vessel archives its

How many locks do we need to Lockout a Double Block & Bleed arrangement

Several clients design Double Block and Bleed (DB&B) isolation into their process, especially when they know they will regularly enter certain Permit-Required Confined Spaces (PRCS). When these DB&B arrangements are part of the design, the isolation valves and the bleed valve are near one another. This allows us to use a single lock with some

Did we learn from the Stapleton Air Port Tank Farm Fire (1990)

Contributing to the severity and duration of the fire was the lack of storage tank fail-safe control valves and internal fire valves and the location of the control building in the containment area where fuel leaks are likely to occur. The National Transportation Safety Board determined that the probable cause of the fire at the

Secondary Containment and “Equalization” of tanks

I think most EHS professionals will agree that bulk tanks of hazardous materials need some means of “secondary containment”. This practice has been in place for my entire career and rarely gets challenged. However, in recent years I have come across several scenarios where either the facility/unit designed the process to function this way or

CSB Releases Second Update into Fatal Hydrogen Sulfide (H2S) Release at PEMEX Refinery in Deer Park, Texas

Today, the CSB released a second update on its ongoing investigation into the fatal hydrogen sulfide (H2S) release that occurred on October 10, 2024, at the PEMEX Deer Park Refinery in Deer Park, Texas. Two contract workers died during the incident, and over 27,000 pounds of toxic hydrogen sulfide gas were released. Local authorities issued

If we are not trending the findings from our 3-year PSM/RMP audits, WTH are we doing?

We see this far too often… a management system failure related to 3-year PSM/RMP audits. A company with multiple facilities should be “trending” its 3-year audit findings to IDENTIFY opportunities for improvement across the company. I did this years ago when I was a member of the Corporate EHS Team for a semi-conductor. And was

Failing to control flammable vapor results in severe injuries for by-stander (video)

A video I posted over two years ago has come full circle. A citizen (some may call him homeless) was allowed to sit (and smoke) within 20′ of a gasoline tanker unloading operation at a gas station. His actions may not have been his sole demise, as we can see in the video evidence that

Dear Ammonia Refrigeration Contractors… Let’s talk about your marketing campaign

Victor Dearman Jr. CIRO, CRST Social media can be a great thing, especially for getting the word out about your services/offerings and showcasing through pictures and videos the work you absolutely should be proud of. Or, should you be proud of it? Yep, this won’t be popular but needs to be said. Engineers, service technicians,

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