Overview
ISO 23693-2:2026 specifies standardized methods for evaluating the resistance of passive fire protection (PFP) materials and systems to mechanical loads that may arise from gas explosions. This part of the ISO 23693 series focuses on divisional substrates, including panels and plates that function as barriers or partitions in structures. The standard addresses the simulation and testing of overpressure scenarios that may be generated by explosions resulting from the release of flammable gases, liquefied gases, flashing liquid fuels, or combustible dusts-events that often precede fire incidents in industrial and high-risk facilities.
The document provides a unified framework to determine the ability of PFP systems to maintain integrity and performance when exposed to explosion-induced overpressure, ensuring effective fire protection solutions in critical installations.
Keywords: ISO 23693-2, Passive Fire Protection, Gas Explosions, Fire Safety, Divisional Substrates, Overpressure Resistance, PFP Materials, Structural Fire Protection
Key Topics
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Explosion Loading Types
Defines overpressure and drag effects resulting from explosions, emphasizing that divisional panels mainly experience pressure loads rather than drag forces.
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Test Methods for PFP Materials
Outlines procedures for simulating mechanical loads on PFP-coated panels and divisional elements under explosion scenarios.
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Specimen Types
- PFP Test Panels: Panels designed to measure PFP system performance, typically adhered directly to substrates.
- Representative Specimens: Full-scale or near-full-scale panels reflecting actual in-service installations, including their support structures and PFP system attachments.
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Instrumentation and Measurement
Specifies requirements for pressure transducers, displacement transducers, and high-speed video to accurately measure dynamic response and permanent deformation during and after testing.
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Data Analysis and Specimen Rating
Provides guidance for analyzing overpressure, elastic and plastic responses, and categorizes performance (elastic, low, medium, and high response) based on support rotation and ductility ratios.
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Environmental and Safety Considerations
Addresses the need for appropriate environmental test conditions and laboratory safety due to the hazardous nature of explosion testing.
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Reporting Requirements
Details comprehensive documentation needs, including pre- and post-test condition, damage descriptions, specimen construction, and all performance data.
Applications
ISO 23693-2:2026 is highly relevant for industries where explosion risk and fire exposure are critical concerns, such as:
- Oil and Gas Facilities: For evaluating and specifying blast-resistant fire protection on walls, partitions, and equipment enclosures.
- Chemical Processing Plants: To qualify PFP materials used in process area divisions.
- Industrial Buildings: For the protection of structural elements subjected to potential accidental explosions.
- Marine and Offshore Structures: For bulkheads, partitions, and fire zones requiring proven explosion resistance.
- Regulatory Compliance and Risk Assessment: Enables asset owners and safety engineers to demonstrate compliance with fire safety and explosion protection requirements using standardized test methodologies.
By implementing ISO 23693-2:2026, organizations can enhance safety, minimize explosion damage, and ensure the continued effectiveness of passive fire protection in explosive atmospheres.
Related Standards
- ISO 23693-1:2021
Determination of the resistance to gas explosions of passive fire protection materials - Part 1: General requirements (provides foundational definitions, overall procedures, and normative references for all parts).
- ISO 13943
Fire safety - Vocabulary (for consistent terminology).
- Other Relevant Guidance
Refer to regional fire safety codes or engineering practices for design and installation of blast-resistant structures.
In summary:
ISO 23693-2:2026 delivers an authoritative testing and rating system for the resistance of passive fire protection materials applied to divisional substrates against gas explosion overpressure, helping industries manage explosion risks, safeguard assets, and meet stringent fire safety standards.