1.1 This test method covers the determination of the insulation value of clothing ensembles. It describes the measurement of the resistance to dry heat transfer from a heated manikin to a relatively calm, cool environment. Information on measuring the local thermal resistance values for individual garments and ensembles is provided in Annex A1.
1.1.1 This is a static test that provides a baseline clothing measurement on a standing manikin.
1.1.2 The effects of body position and movement are not addressed in this test method.
1.2 The insulation values obtained apply only to the particular ensembles evaluated and for the specified environmental conditions of each test, particularly with respect to air movement.
1.3 The values stated in either clo or SI units are to be regarded separately as standard. Within the text, the SI units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.
1.4 The evaporative resistance of a clothing ensemble can be measured in accordance with Test Method F2370.
1.5 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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM F1291-16 Referenced Document
ASTM D1518 Standard Test Method for Thermal Transmittance of Textile Materials
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM F2370 Standard Test Method for Measuring the Evaporative Resistance of Clothing Using a Sweating Manikin
ASTM F2732 Standard Practice for Determining the Temperature Ratings for Cold Weather Protective Clothing
ASTM F1291-16 history
2022ASTM F1291-22 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
2016ASTM F1291-16 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
2015ASTM F1291-15 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
2010ASTM F1291-10 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
2005ASTM F1291-05 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
2004ASTM F1291-04 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
1999ASTM F1291-99 Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin