标准摘要
[中文适用范围]： 本部分ISO 17491规定了一种方法，用于评估气密服对空气外泄的抵抗力。该方法可以在最低测试设置（方法1）或更严格的测试设置（方法2）下进行。测试通过例如必要的开口、紧固件、接缝、物品之间的接口区域、孔洞和任何构造材料中的缺陷来评估空气外泄。 此测试不模拟气体向内渗透。尽管对穿戴者的危险来自于向内泄漏，但本测试方法评估气密服充气后空气的外泄情况，以拉伸构造材料，从而使测试方法能够检测到非常小的缺陷，如孔洞、裂缝或撕裂。 [外文原描述]： This part of ISO 17491 specifies a method to be performed either at minimum test settings (Method 1) or at more rigorous test settings (Method 2), for assessing the resistance of a gas-tight suit to outward leakage of air through, for example, essential openings, fastenings, seams, interface areas between items, pores and any imperfections in the construction materials. This test does not simulate penetration by gases in an inward direction. Although the danger to the wearer arises from leakage in an inward direction, this test method assesses the outward leakage of air after the gastight suit has been inflated so as to stretch the construction material, thereby enabling the test method to detect very small imperfections, such as holes, splits or tears.
英文名称Protective clothing — Test methods for clothing providing protection against chemicals — Part 1: Determination of resistance to outward leakage of gases (internal pressure test)