DAILY Ex+ - 11 OCTOBER 2026

⚡ DAILY Ex+ - 11 OCTOBER 2026

Explosion Protection | Operational Ex | Global Watch

Today's focus: New Ex standards, accountability after a fatal incident, and the difference between equipment compliance and effective protection.

Two developments deserve immediate attention: IEC 60079-1:2026 was officially published on 9 October, and the investigation into Friday's fatal Greek refinery incident has advanced.

For Head of Operations, the common lesson is that explosion protection must remain technically sound, operationally effective and supported by clear responsibilities.

▶️ 1. IEC 60079-1:2026 - NEW EDITION OFFICIALLY PUBLISHED

NEW STANDARD | International - 9 October 2026

The International Electrotechnical Commission has officially published IEC 60079-1:2026, Edition 8.0.

The standard covers equipment protection by flameproof enclosures Ex d.

This is a technical revision of the previous edition, IEC 60079-1:2014. It supplements IEC 60079-0 and contains specific construction and testing requirements for flameproof equipment and components. https://webstore.iec.ch/en/publication/71515

Why it matters operationally

The new edition is immediately relevant to manufacturers, certification bodies, Ex equipment designers and repair specialists.

For operators, however, an important distinction applies: Publication ≠ automatic ATEX harmonization ≠ mandatory replacement of existing certified equipment.

Existing installations must be assessed against their applicable certification, installation requirements, operating conditions and regulatory obligations.

Management action: Ask Engineering and Procurement to review the technical changes and their implications for new equipment specifications and future modifications. Do not automatically change the certification basis recorded for installed assets.

▶️ 2. GREECE - THREE ADDITIONAL ARRESTS AFTER FATAL REFINERY INCIDENT

CURRENT FOLLOW-UP | 10 October 2026

The investigation into Friday's fatal maintenance incident at the https://www.moh.gr/en/ in Agioi Theodoroi has developed.

Greek media reported on 10 October that authorities made three additional arrests, involving a works supervisor, a health-and-safety manager and an operations-related employee.

One contractor died and another remains seriously injured following the 9 October incident.

Earlier reporting indicated that the accident involved an unexpected pressure release during heat-exchanger maintenance. The precise failure mechanism remains under investigation.

The arrests are investigative developments, not findings of guilt. https://www.skai.gr/news/greece/treis-nees-syllipseis-gia-tin-ekriksi-stis-egkatastaseis-tis-motor-oil

Why it matters operationally

The investigation now raises questions extending beyond the workers directly performing the task.

Consider the responsibility chain: equipment owner → maintenance planner → isolation authority → permit issuer → contractor supervisor → workers → return-to-service authority.

For each position, ask: Who verified the equipment was safe to open? Who confirmed that stored energy had been removed? Who authorized the work? Who verified the actual site conditions?

Head of Operations lesson: Contractor competence and permits are necessary, but responsibility for controlling hazardous plant conditions cannot simply be transferred to a contractor.

▶️ 3. HUNGARY - €100,000-PLUS FINE AFTER FATAL PETROCHEMICAL EXPLOSION

REGULATORY FOLLOW-UP | 22 September 2026

Hungarian authorities imposed a HUF 38 million fine on MOL Group subsidiary MOL Petrochemicals following the fatal May explosion at its Tiszaújváros Olefin-1 plant.

The accident occurred during a restart after maintenance. One worker died, four were seriously injured and seven sustained minor injuries.

According to information provided by the Hungarian Ministry, investigators identified inadequate provisions for detecting dangerous process conditions, providing warnings and safely interrupting operations. The company was ordered to review its safety systems and maintenance arrangements. https://infostart.hu/belfold/2026/09/22/halalos-tiszaujvarosi-robbanas-sulyos-hianyossagokat-tart-fel-a-vizsgalat-a-mol-petrolkemianal

Why it matters operationally

This is a regulatory finding, not a newly reported explosion.

It highlights an important distinction: Ex-certified equipment → ignition-source control. Process detection and shutdown → prevention of dangerous process conditions.

Both can be essential, but neither replaces the other.

Management lesson: Before restarting after maintenance, verify the complete protection system-not only the equipment that was repaired.

▶️ 4. RESEARCH - A FEW DROPS OF SOLVENT CAN CHANGE DUST EXPLOSIVITY

2026 RESEARCH | Published 15 July

A paper titled Prewetted Powder Explosion: For a Few Drops More examined mixtures including magnesium stearate with ethanol and wheat-processing material with eucalyptus oil.

Researchers found that introducing relatively small quantities of flammable liquid can significantly change ignition sensitivity and explosion severity.

The effect was not uniform: depending on the powder and liquid concentration, explosibility could increase or decrease.

The researchers specifically highlighted the need to reassess explosion protection when material properties change. https://www.cetjournal.it/index.php/cet/article/view/CET26126033

Why it matters operationally???

A powder does not necessarily retain its original explosion characteristics after adding a solvent, oil or other processing aid.

Existing explosion venting and protection calculations may no longer represent the actual material.

Engineering lesson: Material changes require assessment of the relevant explosion characteristics, not merely confirmation that the original powder remains the main ingredient.

▶️ 5. INTERNATIONAL FIRE SAFETY FORUM - BUDAPEST

UPCOMING | Hungary - 12–14 October

The 2026 International Forum on Fire Safety Science and Fire Protection Technology begins tomorrow.

Organized through cooperation between universities in China, Hungary and Slovakia, the program includes material flammability, fire propagation, advanced firefighting technologies and research collaboration.

Registration activities begin today. https://www.iffssfpt.com/

Why it matters operationally???

Explosion protection and fire protection are closely connected, but their design assumptions and performance requirements are not identical.

An explosion can initiate a fire. A fire can initiate an explosion.

Operators need emergency arrangements that consider both sequences.

▶️ 6. OPERATIONAL Ex USE CASE - REPLACING A FILTER ELEMENT

PRACTICAL

A combustible-dust extraction system experiences increasing pressure drop.

Maintenance replaces the original filter elements with an alternative product.

The dimensions fit.

Airflow improves.

Production resumes.

But the replacement filter material has different electrostatic properties.

Nobody has checked whether the new elements preserve the original explosion-protection assumptions.

The questions are straightforward.

Is the filter material suitable for the combustible dust?

Are its electrostatic properties acceptable?

Does the replacement affect the explosion-protection design or certification of the assembly?

Have the operating and maintenance requirements changed?

Was the replacement technically accepted before restarting?

Operational lesson: Mechanical compatibility is not evidence of explosion-protection equivalence.

▶️ TODAY'S Ex QUESTION

“Which of our explosion-protection assumptions are verified during maintenance and which are simply assumed to remain valid?”

Consider flameproof joints, bonding, filter materials, isolation-device installation conditions and protection-system availability.

Then select one critical asset and follow its evidence: Certificate → installation requirements → maintenance history → modifications → latest inspection → outstanding defects → authorized operation.

The question is not whether the equipment was compliant when purchased.

The question is whether the complete protection system remains effective today.

DAILY Ex | CLOSING THOUGHT

Today's developments illustrate three different responsibilities.

The manufacturer must establish the conformity of the product.

The engineer must establish its suitability for the application.

The operator must preserve the conditions that make the installation safe throughout its operating life.

These responsibilities are connected, but they are not interchangeable.

Explosion protection is established through engineering. Operational Ex keeps it effective.