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Author: Veress Árpád · Explosion-protection expertDAILY Ex - 30 OCTOBER 2026
TODAY'S FOCUS: A safety system is only effective when every part of it works. New UK machinery and pressure-equipment standards proposals, a significant IEC 60079 milestone, an industrial enforcement case, and developments in gas detection and explosion research lead today's edition. For Heads of Operations: The absence of one protective measure can undermine the safety of an entire installation.
⚡ DAILY Ex | 30 OCTOBER 2026
Explosion Protection | Operational Ex | Global Watch
TODAY'S FOCUS: A safety system is only effective when every part of it works.
New UK machinery and pressure-equipment standards proposals, a significant IEC 60079 milestone, an industrial enforcement case, and developments in gas detection and explosion research lead today's edition.
For Heads of Operations: The absence of one protective measure can undermine the safety of an entire installation.
🔴 1. UK | Missing machine guard results in £245,000 fine
NEW ENFORCEMENT DECISION - 29 October 2026
The Health and Safety Executive reported that a Scottish fish-processing company was fined £245,000 following a serious machinery accident.
A fixed guard had been removed during maintenance and not replaced for approximately two weeks.
Workers subsequently used the unprotected opening to access the machinery instead of the interlocked safety gate.
During blockage removal, the machine restarted and seriously injured an employee.
The investigation found that routine inspections did not cover all fixed guards.
Why it matters operationally: Machinery safety and explosion protection share an essential principle: protective measures must remain effective after maintenance.
Management action: Verify that post-maintenance inspections cover mechanical guards, electrical interlocks and explosion-protection arrangements.
⚖️ 2. UK | New machinery standards proposal includes metal additive manufacturing
NEW REGULATORY DEVELOPMENT - 28 October 2026
The UK government published proposal 0155/26, updating designated standards supporting the Supply of Machinery (Safety) Regulations.
Among the proposed references are:
* EN ISO/ASTM 52938-1:2025 - Safety requirements for metal powder-bed fusion machines.
* EN ISO 14119:2025 - Interlocking devices associated with guards.
* EN IEC 62061:2021/A1:2024 - Functional safety of machinery control systems.
* EN ISO 10218-1/-2:2025 - Industrial robots and robotic applications.
The proposal is scheduled for publication as a designation notice on 26 November 2026, subject to the applicable procedure.
These references are proposed, not yet newly designated under this notice.
Why it matters operationally: Metal additive manufacturing combines machinery hazards with potentially combustible metal powders.
Compliance with machinery-safety standards does not automatically demonstrate compliance with applicable explosion-protection requirements.
📘 3. IEC 60079-46 | Final draft voting closes today
CURRENT STANDARDS MILESTONE - 30 October 2026
The International Electrotechnical Commission confirms that voting on the Final Draft International Standard for IEC 60079-46, Equipment assemblies, closes today.
The document addresses the design, construction, testing, assessment, marking and documentation of assemblies incorporating individually certified Ex equipment.
It also addresses additional ignition hazards created through integration.
The IEC currently forecasts publication in January 2027.
Status: Final draft. Not yet a published International Standard.
Why it matters operationally: A skid containing individually certified motors, pumps, valves and instruments is not automatically a compliant Ex assembly.
Engineering lesson: The complete assembly must be assessed, including interfaces and additional ignition hazards.
https://webstore.iec.ch/en/publication/117098
⚖️ 4. UK | Pressure-equipment standards transition proposed
NEW REGULATORY DEVELOPMENT - 28 October 2026
The UK government also published proposal 0156/26, addressing designated standards for pressure equipment.
Relevant proposed references include EN 14129:2024 for LPG pressure-relief valves, EN ISO 21009-2:2024 for cryogenic-vessel operation and EN ISO 24664:2024 for refrigerating-system pressure-relief arrangements.
The proposal identifies 2 April 2028 as the withdrawal date for specified superseded references, subject to the designation process. GOV.UK
Why it matters operationally: Loss of containment is often the initiating event in an explosion scenario.
Pressure integrity, relief-system design and explosion prevention must be considered together, while retaining their distinct regulatory requirements.
🔴 5. USA | Fire triggers emergency at Savannah River Site
CURRENT INCIDENT - 28 October; reported 29 October 2026
A fire at the Savannah River Site in South Carolina triggered a site-area emergency.
One employee suffered minor injuries.
Authorities reported that the fire was extinguished and no radioactive contamination was identified.
Emergency measures included sheltering personnel and temporarily restricting nearby transport.
The cause has not been disclosed.
Important distinction: This was a confirmed industrial fire. An explosive-atmosphere explosion has not been reported. Reuters
Why it matters operationally: Emergency arrangements must address interacting hazards and provide clear information to responders.
🔬 6. RESEARCH | Can water sprays mitigate hydrogen detonations?
RESEARCH SPOTLIGHT - Published 11 September 2026
Researchers from Spanish universities investigated water-spray mitigation of hydrogen-air detonations.
The study used a one-dimensional theoretical model incorporating chemical kinetics and interactions between gas and water droplets.
It examined conditions affecting detonation propagation and mitigation.
The findings provide insight into possible mitigation mechanisms but do not establish a universally applicable industrial protection system.
Why it matters operationally: Hydrogen explosion mitigation requires understanding flame and pressure development, not simply installing conventional fire-protection equipment.
Engineering lesson: Research findings must be validated for the actual geometry, mixture and operating conditions before being credited as protective measures.
https://portalcientifico.upm.es/en/ipublic/item/10552484
📘 7. FRANCE | A grounded container did not prevent an electrostatic explosion
DOCUMENTED INCIDENT LEARNING - 23 April 2026
France's official ARIA industrial-accident database records an explosion and fire during the transfer of heptane-wetted powder at a chemical facility in Bon-Encontre.
Three people suffered minor injuries.
The investigation identified electrostatic charging during transfer from a polypropylene centrifuge basket into a grounded bulk bag as the initiating mechanism.
Why it matters operationally: Grounding the receiving container does not necessarily eliminate electrostatic hazards associated with insulating materials and powder transfer.
Historical lesson: The entire transfer arrangement must be assessed, including material properties, containers, liners and charging mechanisms.
https://www.aria.developpement-durable.gouv.fr/accident/66989/
▶️ OPERATIONAL Ex USE CASE
The machine is certified. The complete production package has changed.
PRACTICAL | Illustrative scenario
A pharmaceutical manufacturer purchases a packaged powder-processing machine.
Its motors are Ex-certified.
The electrical enclosure is correctly marked.
The dust collector has explosion protection.
The equipment is installed and commissioned.
Six months later, production introduces a new powder-transfer connection and replaces part of the conveying arrangement.
Maintenance considers the modification minor because no certified electrical component has changed.
But is the complete assembly still safe?
The modification may affect electrostatic charging, mechanical ignition sources, dust accumulation, extraction performance or explosion propagation.
The original equipment certificates do not automatically cover these changes.
Required decision: Engineering must determine whether the modification affects the original assembly assessment, hazardous-area classification, ignition-hazard assessment or explosion-protection arrangements.
The review should consider IEC 60079-46, applicable non-electrical equipment requirements and the installation's existing verification documentation.
Owner: Engineering Manager, supported by the Ex Responsible Person.
Required evidence: Approved Management of Change, revised assembly and process documentation, technical assessment, verification of affected protective measures and return-to-service authorisation.
Measure: 100% of modifications affecting Ex machinery assemblies assessed before operation.
▶️ TODAY'S Ex QUESTION
“Which protective measures in our plant have been removed, bypassed or changed since the original commissioning?”
Consider machine guards, ventilation, gas detection, extraction systems, explosion isolation and equipment interlocks.
A protection system may still appear in the documentation even when its physical configuration has changed.
⚡ DAILY Ex | CLOSING THOUGHT
Today's developments connect machinery safety, pressure integrity and explosion protection.
A machine guard protects against mechanical hazards.
A pressure-relief system controls pressure-related hazards.
An Ex protection concept addresses defined ignition risks.
An explosion-isolation system limits propagation.
Each performs a different function, but all depend on correct specification, installation and continued effectiveness.
A certificate demonstrates conformity within a defined scope. It does not demonstrate that every protective measure remains effective after years of operation and modification.
For Heads of Operations, the responsibility is to maintain that connection between engineering design and operational reality.
The protection designed yesterday must still work in the installation operating today.
That is Operational Ex.