ASTM D1122 – Standard Test Method for Relative Density of Engine Coolant Concentrates and Engine Coolants By The Hydrometer
Description:
Significance and Use
4.1 The relative density of an engine coolant may be used to determine the approximate percent glycol, freezing point, and boiling point, provided the glycol type is known.
4.2 The relative density of an engine coolant concentrate can be used as a production control test.
4.3 ASTM specifications normally state the temperatures for relative density of fluids; 25 °C, 20 °C, and 15.6 °C are commonly used temperatures.
Scope
1.1 This test method covers the determination of the relative density of glycols, glycerin, heat transfer fluids, engine coolant concentrates, and aqueous engine coolants.
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.
ASTM D1121