ASTM F3672-23 PDF

SIGNIFICANCE AND USE 4.1 This test method can be used to quantify and compare the evaporative resistance imposed by different clothing items or ensembles as long as each test is conducted using the same experimental procedures and test conditions. For example, variations in the design and material used in gloves can be evaluated. The effects of layering, closures, and fit can also be measured. 4.2 The measurement of the evaporative resistance imposed by clothing is complex and dependent upon the apparatus and techniques used. It is not practical in a test method of this scope to establish details sufficient to cover all contingencies. Departures from the instructions in this test method have the potential to lead to significantly different test results. Technical knowledge concerning the theory of heat transfer, moisture transfer, temperature, humidity and air motion measurement, and testing practices is needed to evaluate which departures from the instructions given in this test method are significant. Standardization of the method reduces, but does not eliminate, the need for such technical knowledge. Report any departures with the results. SCOPE 1.1 This test method covers the determination of the evaporative resistance of clothing items that cover only the head (Option 1), a hand (Option 2), or a foot (Option 3). It describes the measurement of the resistance to evaporative heat transfer from a heated sweating thermal manikin form to the testing environment. 1.1.1 This is a static test that provides a baseline clothing measurement on a stationary head manikin form (Option 1), hand manikin form (Option 2), or foot manikin form (Option 3). 1.1.2 The effects of body form position, movement, and contact with other surfaces are not addressed in this test method. 1.2 The evaporative resistance values obtained apply only to the particular clothing items evaluated and for the specified environmental conditions of each test. 1.3 Evaporative resistance values reported in SI units shall be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.