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Description of ASTM-G229 2026ASTM G229-26Active Standard: Standard Practice for Estimating the Time of Wetness Potential at an Outdoor Weathering Site using a Cotton Wick SensorASTM G229Scope 1.1 This practice covers a procedure for determining the time of wetness for a location used in the outdoor exposure of materials. 1.2 This practice covers a procedure for determining the total time of wetness due to condensation and rainfall. 1.3 This practice does not distinguish the individual causes of time of wetness such as condensation and rainfall. 1.4 This practice does not address total or actual amount of time that a specific specimen is wet. This practice is intended to provide direction on how to estimate a general wetness value for a location. 1.5 This practice does not account for differences in mounting and exposure of the test specimen. 1.6 This practice can be used to characterize and compare different locations based on that location’s ability to create surface moisture on an exposed test specimen through condensation and rainfall. 1.7 Only one technique for estimating potential time of wetness is covered in this practice. Other methods exist for determining time of wetness are covered in other standards such as Practice G84. 1.8 This practice covers an apparatus that can be built by most people using readily available parts from various retail stores. Other methods use commercially produced apparatus that are self-contained, such as leaf-wetness sensors. There are also several mathematical methods that derive wet time from published weather data, and require no additional specialized instrumentation. One example is ISO 9223. Appendix X1 contains more information on these other methods. 1.9 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.10 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. 1.11 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. Keywords exposure location; time of wetness; ICS Code ICS Number Code n/a DOI: 10.1520/G0229-26 This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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