Determination of the resistance to gas explosions of passive fire protection materials — Part 3: Tubular and I-section substrates subject to elastic deformation only

This technical specification establishes a standardized test method for evaluating the resistance of passive fire protection materials subjected to gas explosions. Specifically, it focuses on tubular and I-shaped substrates that undergo only elastic deformation during exposure to explosive forces. The procedure outlines precise experimental conditions, instrumentation requirements, and data analysis protocols to ensure consistent and reproducible results across different laboratories and testing environments. It provides guidance on the preparation of test specimens, the configuration of the explosion chamber, and the measurement of structural response under high-pressure shock waves. The standard is designed to support engineers and researchers in assessing the performance of fire safety systems without causing permanent damage to the protective materials. By defining clear criteria for elastic behavior, it aids in the development of materials that maintain structural integrity during transient loading events. The methodology aligns with broader international efforts to enhance safety in industrial settings where gas explosion risks are present.