ASTM E96/E96M - 16 - Standard Test Methods for Water Vapor Transmission of Materials

ASTM E96/E96M - 16

Standard Test Methods for Water Vapor Transmission of Materials

Status : Current   Published : March 2016

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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 1 1/ 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).

(A)  These units are used in the construction trade. Other units may be used in other standards.
(B)  All conversions of mm Hg to Pa are made at a temperature of 0°C.

1.3  This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.




Standard NumberASTM E96/E96M - 16
TitleStandard Test Methods for Water Vapor Transmission of Materials
StatusCurrent
Publication Date01 March 2016
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Permeability, Plastics (general), Plastic sheet and film, Sheet material, Thermal-insulating materials, Thermal insulation permeability films, Water vapor transmission (WVT)
ICS77.040.99
PublisherASTM
FormatA4
DeliveryYes
Pages14
File Size257 KB
Price£45.00


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