DAILY Ex - 2 OCTOBER 2026

⚡ DAILY Ex - 2 OCTOBER 2026

Explosion Protection | Operational Ex | Global Watch

Today’s strongest Operational Ex story is a newly released https://www.csb.gov/ safety video. It is a powerful reminder that major accidents rarely begin with one spectacular failure. They develop through small deviations, missed alarms and decisions made while the process is already deteriorating.

▶️ “ALARMING MISTAKES, DEADLY DECISIONS”

CURRENT RELEASE | USA - 1 October

The U.S. Chemical Safety and Hazard Investigation Board has released a new safety video on the fatal 2022 BP-Husky refinery fire in Oregon, Ohio. https://www.csb.gov/videos/

During a process upset in the naphtha hydrotreater, highly flammable liquid naphtha escaped from pressurized equipment, reached the ground, vaporised and created a large flammable cloud that ignited. Two workers were killed. https://www.powderbulksolids.com/industrial-fires-explosions/csb-issues-safety-video-on-2022-fatal-fire-at-bp-husky

The title says a lot: Alarming Mistakes, Deadly Decisions.

The Operational Ex lesson is: process upset → alarms → operator decisions → containment → flammable atmosphere → ignition → consequence.

When abnormal operation starts, the operating team is effectively managing an evolving hazardous-area situation.

Why it matters: alarms are barriers only when people understand what they mean and have clear authority to move the process toward a safe state.

https://www.csb.gov/videos/?SID=3620

▶️ NEW CHEMICAL-SAFETY LAW AFTER A NEAR EXPLOSION

CURRENT REGULATORY | California, USA

California has signed SB 883 - the Preventing Chemical Explosions Act, following May's Garden Grove emergency involving methyl methacrylate (MMA). https://sd34.senate.ca.gov/news/governor-newsom-signs-senator-umbergs-chemical-safety-legislation-following-garden-grove

During that event, thousands of gallons of MMA began overheating and building pressure at an aerospace facility. Around 50,000 people were evacuated while responders worked for days to prevent an explosion or major release.

The new law brings MMA into California's accidental-release prevention framework and introduces additional requirements for future facilities, including siting and backup cooling provisions. Existing sites are not fully captured by all of the new siting restrictions. https://calmatters.org/environment/2026/09/garden-grove-chemical-safety-law/

Why it matters operationally: This was essentially a loss-of-control-of-reaction problem.

For reactive chemicals, ask: What keeps the chemistry stable?

Cooling? Inhibitor? Agitation? Temperature monitoring? Pressure relief?

Then ask the harder question: What happens when that utility or barrier fails?

▶️ HANWHA - 473 VIOLATIONS AFTER A FATAL EXPLOSIONOW-UP | South Korea

Yesterday's Korean investigation deserves inclusion because the findings go far beyond the original accident.

Authorities identified 473 safety and health violations at https://www.hanwhaaerospace.com/'s Daejeon plant following the June explosion that killed five workers.

Among them were 46 explosion/fire-related violations, including reported use of equipment without appropriate explosion-protection certification in explosion-risk areas. https://www.upi.com/Top_News/World-News/2026/10/01/labor-ministry-found-hanwha-aerospace/2111790904806/

But perhaps the most important management finding is broader: production and employment had expanded without a corresponding increase in safety resources.

Why it matters operationally: Increasing production capacity should trigger an MoC question about risk-control capacity too.

More production may require more: inspection → maintenance → housekeeping → supervision → Ex competence → PSM resources.

Production capacity and safety capacity should not be managed independently.

▶️ RESEARCH - METAL-DUST DATA MAY NOT REPRESENT YOUR PROCESS

CURRENT RESEARCH | 2026

A recent Chemical Engineering Transactions paper highlights an important problem with metal and light-metal powders: industrial explosion hazards are still frequently underestimated when database explosion parameters are assumed to represent actual process conditions. https://www.cetjournal.it/index.php/cet/article/view/CET26126035

The authors specifically note significant variability in aluminum-dust parameters such as Pmax and KSt.

Why it matters operationally:

The value in a database is not automatically your dust.

Particle size, moisture, oxidation, production method and actual process conditions matter.

Before designing explosion venting or suppression around historical data, ask:

Was this material actually tested under representative conditions?

▶️ OPERATIONAL Ex USE CASE - BYPASSING AN ALARM

PRACTICAL |

A gas detector repeatedly alarms because maintenance work is generating nuisance readings.

Someone inhibits the alarm.

Maintenance finishes.

Production restarts.

The bypass remains.

Nothing has physically failed.

But one protection layer has disappeared.

This is why bypass management should answer:

Who authorised it? → why? → what compensating measure exists? → when does it expire? → who verifies reinstatement?

Temporary inhibition is an Operational Ex Management of Change.

▶️ GOOD ENGINEERING PRACTICE - CHECK THE SAFE STATE | reinforced by the CSB case

Pick one critical Ex/process alarm today.

Don't ask only:

“Does the alarm work?”

Ask:

“What is the operator expected to do when this alarm occurs?”

Then:

Is that response documented?

Has it been trained?

Can the operator actually perform it?

Does it move the process toward a safe state?

Alarm testing without response testing verifies only half the barrier.

▶️ TODAY'S Ex QUESTION

Choose one process alarm that can precede a flammable release:

high pressure / high temperature / high level / low flow / gas detection.

Ask the operator:

“If this alarms right now, what do you do?”

Then compare the answer with the procedure.

If the procedure, operator and control system expect three different responses, you have found something worth fixing.

Daily Ex

Explosion protection doesn't begin when the gas detector sees gas.

It begins when Operations recognizes that the process is moving toward a condition where that gas could be released.