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Description of ASTM-D938 2012ASTM D938 - 12Standard Test Method for Congealing Point of Petroleum Waxes, Including PetrolatumActive Standard ASTM D938 | Developed by Subcommittee: D02.10.0A Book of Standards Volume: 05.01
Translated Standard: Russian ASTM D938Significance and Use 5.1 Congealing point is a wax property that is of interest to many petroleum wax consumers. The procedure described here measures the temperature at which a sample being cooled develops a set or resistance to flow. At that temperature, the wax may be at or close to the solid state, or it may be semisolid and quite unctuous, depending on the composition of the wax or petrolatum being tested. In the case of petrolatums, congealing property is associated with the formation of a gel structure as the sample cools. 1. Scope 1.1 This test method covers determination of the congealing point of petroleum waxes, including petrolatum. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 WARNING Mercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPAs website http://www.epa.gov/mercury/faq.htm for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1 This test method is an alternative to Test Method D127 . Results obtained are usually lower than the
results obtained by Test Method D127 ?IP?133, the amount of the deviation varying with the nature of the petroleum wax.
ASTM Standards D127 Test Method for Drop Melting Point of Petroleum Wax, Including Petrolatum E1 Specification for ASTM Liquid-in-Glass Thermometers Keywords congealing point; petrolatum; petroleum waxes; ICS Code ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products) DOI: 10.1520/D0938-12 ASTM International is a member of CrossRef. ASTM D938The following editions for this book are also available...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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