ASTM D4279-95R22 - Standard Test Methods for Water Vapor Transmission of Shipping Containers—Constant and Cycle Methods
Standard Test Methods for Water Vapor Transmission of Shipping Containers—Constant and Cycle Methods
|Keywords:||constant rate of gain; cycle method; desiccant; reclosable containers; water vapor permeability ;|
1.1 These test methods cover the determination of water vapor transmission rates for bulk shipping containers, as follows:
1.1.1 Method A, for Reclosable Containers, and
1.1.2 Method B, for Containers Not Designed for Reclosing.
1.2 Within each procedure details are given for the constant and cycle methods of test atmosphere.
1.3 The test may be applied to the container as packed, or after one or more performance tests such as drum (Method ), vibration (Methods ), drop (Test Method ), impact resistance (Test Methods , , and ), or performance tests (Practice ), as required.
1.4 For small shipping containers requiring greater accuracy in weighing, the water vapor transmission may be determined in accordance with Test Method or Test Method .
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 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.
1.7 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.