ASTM E96/E96M-13
Standard Test Methods for Water Vapor Transmission of Materials

Standard No.

ASTM E96/E96M-13

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E96/E96M-14

Latest

ASTM E96/E96M-24

Scope

5.1 The purpose of these tests is to obtain, by means of simple apparatus, reliable values of water vapor transfer through permeable and semipermeable materials, expressed in suitable units. These values are for use in design, manufacture, and marketing. A permeance value obtained under one set of test conditions may not indicate the value under a different set of conditions. For this reason, the test conditions should be selected that most closely approach the conditions of use. While any set of conditions may be used and those conditions reported, standard conditions that have been useful are shown in Appendix X1.

1.1 These test methods cover the determination of water vapor transmission (WVT) of materials through which the passage of water vapor may be of importance, such as paper, plastic films, other sheet materials, fiberboards, gypsum and plaster products, wood products, and plastics. The test methods are limited to specimens not over 1¹/₄ in. [32 mm] in thickness except as provided in Section 9. Two basic methods, the Desiccant Method and the Water Method, are provided for the measurement of permeance, and two variations include service conditions with one side wetted and service conditions with low humidity on one side and high humidity on the other. Agreement should not be expected between results obtained by different methods. The method should be selected that more nearly approaches the conditions of use.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. However, derived results can be converted from one system to the other using appropriate conversion factors (see Table 1).

TABLE 1 Metric Units and Conversion Factors^A,B

Multiply	by	To Obtain (for the same test condition)
WVT
8199;g/h·m2	1.43	8199;8199;grains/h·ft2
8199;grains/h·ft2	ASTM E96/E96M-13 history 2024 ASTM E96/E96M-24 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2023 ASTM E96/E96M-23 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2022 ASTM E96/E96M-22ae1 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2022 ASTM E96/E96M-22a Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2022 ASTM E96/E96M-22 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2021 ASTM E96/E96M-21 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 0000 ASTM E96/E96M-20 2016 ASTM E96/E96M-16 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials 2015 ASTM E96/E96M-15 Standard Test Methods for Water Vapor Transmission of Materials 2014 ASTM E96/E96M-14 Standard Test Methods for Water Vapor Transmission of Materials 2013 ASTM E96/E96M-13 Standard Test Methods for Water Vapor Transmission of Materials 2012 ASTM E96/E96M-12 Standard Test Methods for Water Vapor Transmission of Materials 2010 ASTM E96/E96M-10 Standard Test Methods for Water Vapor Transmission of Materials 2005 ASTM E96/E96M-05 Standard Test Methods for Water Vapor Transmission of Materials 2000 ASTM E96-00e1 Standard Test Methods for Water Vapor Transmission of Materials 2000 ASTM E96-00 Standard Test Methods for Water Vapor Transmission of Materials 1995 ASTM E96-95 Standard Test Method for Water Vapor Transmission of Materials 1990 ASTM E96-90 Standard Test Method for Water Vapor Transmission of Materials Copyright ©2024 All Rights Reserved