ISO 17491-4:2024 防護服 ― 化学薬品から保護する衣類の試験方法 ― 第 4 部:液体噴霧による浸透耐性の測定（噴霧試験） | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 94, Personal safety — Personal protective equipment, Subcommittee SC 13, Protective clothing, in collaboration with the European Committee for Standardization, (CEN) Technical Committee CEN/TC 162, Protective clothing including hand and arm protection and lifejackets, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 17491-4:2008), which has been technically revised. It also incorporates the Amendment ISO 17491-4:2008/Amd.1:2016.

The main changes are as follows:

• specifications for test liquid have been revised/added;
• Clause 6 has been revised to provide more specificity. Specification have been changed and/or revised for absorbent overall, calibrated stain, turntable, spray booth, spray boom, hydraulic nozzles in Clause 6 and other applicable clauses;
• details for the selection of the right overall size have been added in 6.10 as well as in Annex B;
• 8.3 has been revised and heading changed to “Distribution of the spray liquid and alignment of spray nozzles.”;
• figure and additional information have been added in 9.1 to provide more specificity;
• inclusion of Annex A on absorbent fabric for the detector suit and non-absorbent fabric for the calibration pattern;
• inclusion of Annex B on test subject size measurement and right overall size fitting;
• inclusion of Annex C on right donning and doffing, as well as stain area measurement;
• inclusion of Annex D with the ILT results.

A list of all parts in the ISO 17491 series can be found on the ISO website.

Introduction

This document describes a test method for determining the spray penetration resistance of chemical protective clothing Type 4 (with spray-tight connections between different parts of the clothing and, if applicable, between the clothing and other items of personal protective equipment) and Type 6 (limited performance protective clothing).

Such clothing comprises one or more items covering the full surface of the body and is intended to be worn under conditions where there is a risk of exposure to a spray of a liquid chemical. Other requirements with regard to this type of clothing and its constituent materials can be found in the respective product standards^[1].

Interlaboratory testing has shown that this test method is a repeatable pass/fail method.

A document on the selection, use and maintenance of chemical protective clothing is available^[2].

1 Scope

This document specifies the test method for determining the resistance of chemical protective clothing to penetration by sprays of liquid chemicals at two different levels of intensity:

• a) Method A: low-level spray test. This is applicable to clothing that covers the full body surface and is intended to be worn when there is a potential risk of exposure to small quantities of spray or accidental low-volume splashes of a liquid chemical.
• b) Method B: high-level spray test. This is applicable to clothing with spray-tight connections between different parts of the clothing and, if applicable, between the clothing and other items of personal protective equipment, which covers the full body surface and which is intended to be worn when there is a risk of exposure to sprayed liquid chemical.

This document does not apply to chemical permeation resistance of the materials from which the chemical protective clothing is made.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11610 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography