Overview
ISO 18640-1:2018/Amd 1:2019 is an important amendment to the international standard focused on protective clothing for firefighters and its physiological impact. This document specifically addresses the measurement of coupled heat and moisture transfer using the sweating torso method, which simulates human perspiration and heat exchange to evaluate firefighter protective gear. Published by the International Organization for Standardization (ISO), this amendment provides updated and normative requirements for test methods ensuring more accurate and reliable assessment of firefighter clothing performance.
Key Topics
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Coupled Heat and Moisture Transfer Measurement
The standard details methodology for assessing how firefighter protective clothing manages combined heat and moisture, critical for maintaining body temperature and comfort during firefighting operations.
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Sweating Torso Testing Method
It specifies the use of a sweating torso-a test apparatus designed to mimic human skin sweating and heat production-to quantify heat and moisture transfer characteristics of protective garments.
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Revised Technical Annexes
Amendment 1 changes Annex A and B from informative to normative, making technical descriptions and calibration procedures mandatory for compliance, thus improving consistency and precision in testing.
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Calibration and Operational Procedures
The document establishes updated calibration protocols for the sweating torso device, ensuring reproducibility and accuracy of measured data.
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Terminology and Measurement Corrections
Several textual clarifications improve the description of apparatus components, measurement points (such as wind speed near ventilation systems), and envelope specifications for the sweating torso to standardize testing environments.
Applications
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Firefighter Protective Clothing Design and Evaluation
Manufacturers can use the standard to optimize materials and garment construction to improve thermal comfort and safety of firefighters in extreme heat conditions.
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Safety Compliance Testing
Fire departments and regulatory bodies can adopt this standard to verify protective gear performance before deployment, ensuring compliance with safety policies.
Open preview (PDF)Protective clothing for firefighters — Physiological impact — Part 1: Measurement of coupled heat and moisture transfer with the sweating torso — Amendment 1
