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ASTM D7437-23

Current Revision

Standard Test Method for Temperature and Hard Water Stability of Engine Coolants

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1.1 This test method covers a simple glassware-type procedure for evaluating the effects of temperature and hard water on the stability of engine coolants at elevated temperatures under controlled laboratory conditions.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.3 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.

1.4 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.


4.1 This test method provides information on the stability of the engine coolant concentrate when stored at elevated temperatures for two weeks. These test conditions might simulate the conditions that a product would be subjected to in transit and storage in warehouses before delivery to the customer.

4.2 This test method provides information on the stability of an engine coolant diluted with synthetic hard water at elevated temperatures. This test method provides a laboratory method to test the sensitivity of the engine coolant to hard water.

SDO ASTM: ASTM International
Document Number D7437
Publication Date Nov. 1, 2023
Language en - English
Page Count 3
Revision Level 23
Supercedes
Committee D15.06
Publish Date Document Id Type View
Nov. 1, 2023 D7437-23 Revision
Nov. 1, 2008 D7437-08 Revision
Oct. 1, 2019 D7437-08R19 Reaffirmation
May 1, 2013 D7437-08R13 Reaffirmation