ISO 18640-2-2018 amd1-2019 PDF

Full title and description

Protective clothing for firefighters — Physiological impact — Part 2: Determination of physiological heat load caused by protective clothing worn by firefighters — Amendment 1 (ISO 18640-2:2018/Amd 1:2019). This document is an amendment that modifies test conditions and tolerances used in the Part 2 test method for assessing the physiological heat load of firefighter protective clothing.

Abstract

This amendment updates ISO 18640-2:2018 by refining environmental tolerances and certain test temperature profiles used when determining physiological heat load of firefighter clothing. Its purpose is to improve repeatability and to better reflect realistic heat-stress conditions encountered in firefighter operations.

General information

• Status: Published (Amendment to ISO 18640-2:2018)
• Publication date: October 2019 (2019-10).
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 13.340.10 (Protective clothing)
• Edition / version: Edition 1 — Amendment 1 (2019)
• Number of pages: 1 (amendment document)

Primary bibliographic information from the ISO catalogue and published amendment details.

Scope

This amendment applies specifically to ISO 18640-2:2018 and provides revisions to the test method for determination of physiological heat load caused by firefighters’ protective clothing. It narrows tolerances for environmental test conditions and adjusts the steady-state temperature profile used in one phase of the test so the procedure yields more reproducible and operationally relevant results. The amendment does not replace the core procedure but modifies selected parameters of the Part 2 test.

Key topics and requirements

• Amendment to ISO 18640-2:2018 — specifies changes to the Part 2 test for physiological heat load.
• Tighter environmental tolerances for test conditions (examples reported in summaries include narrow bands for ambient temperature, relative humidity and wind speed to improve repeatability).
• Adjustment of the steady-state temperature profile used in a critical 60‑minute phase of the test (reported change from a 30 °C setpoint to 35 °C for that phase in published summaries).
• Clarification of procedural details to ensure consistent measurement of physiological heat load attributable to protective clothing ensembles.
• Technical stewardship by ISO/TC 94/SC 14 (Firefighters' personal equipment).

Typical use and users

Used by standards committees, test laboratories, manufacturers of firefighter protective clothing, occupational health and safety specialists, and procurement authorities to validate and compare ensembles for thermal burden. The amendment is applied when performing ISO 18640-2:2018 test sequences to ensure measurements reflect the revised, more tightly controlled conditions.

Related standards

Directly related to ISO 18640-2:2018 (the base Part 2 standard). It is part of the ISO 18640 series on physiological impact of firefighter protective clothing (see also ISO 18640-1:2018 and its Amendment 1:2019 for Part 1 test methods). The document is developed under ISO/TC 94/SC 14, which produces other standards for firefighter personal equipment and test methods.

Keywords

firefighter protective clothing, physiological impact, heat load, test method amendment, ISO 18640-2, environmental tolerances, thermal burden, ISO/TC 94/SC 14.

FAQ

Q: What is this standard?

A: ISO 18640-2:2018/Amd 1:2019 is Amendment 1 to Part 2 of the ISO 18640 series — a short published amendment that modifies selected test parameters used to determine the physiological heat load caused by firefighter protective clothing.

Q: What does it cover?

A: It covers specific changes to the Part 2 test procedure (ISO 18640-2:2018), chiefly tighter environmental tolerances and adjustments to a steady‑state temperature phase used during measurement of physiological heat load; the amendment refines but does not replace the underlying test method.

Q: Who typically uses it?

A: Test laboratories, manufacturers of firefighter ensembles, certification bodies, occupational health professionals, and standards developers use the amendment when performing or reviewing ISO 18640-2 test runs to ensure results comply with the updated parameters.

Q: Is it current or superseded?

A: The amendment was published in October 2019 and is an official published amendment to ISO 18640-2:2018. To confirm whether any later revisions or further amendments have been issued since 2019 consult the ISO catalogue or the relevant national standards body for the latest status.

Q: Is it part of a series?

A: Yes — it is part of the ISO 18640 series on the physiological impact of firefighter protective clothing (Part 1, Part 2, etc.). This amendment specifically amends Part 2; related amendments exist for other parts in the series.

Q: What are the key keywords?

A: Firefighter protective clothing; physiological heat load; thermal burden; test method amendment; environmental tolerances; ISO 18640-2; sweating torso (related test apparatus used in the series).