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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 165. Corporation Commission |
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Chapter 16. Antifreeze |
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Subchapter 5. Testing of Antifreeze |
SECTION 165:16-5-4. Testing of propylene glycol antifreeze
Latest version.
- The American Society for Testing and Materials (ASTM) standards shall be used to make the following tests of antifreeze.(1) Boiling point test. The boiling point of an antifreeze shall be determined by the ASTM designation D-1120 (2016) test. The boiling point of a concentrated antifreeze shall not be below 305° F or 152° C. When added to the cooling system of a motor vehicle, a 50% antifreeze solution at atmospheric pressure shall increase the boiling point to a degree not less than 219° F or 104° C.(2) pH test. The pH of an antifreeze shall be determined by the ASTM designation D-1287 (2011) test. The pH of an antifreeze shall be run by using a solution composed of 50% concentrated antifreeze and 50% distilled water, by volume. The pH of this antifreeze solution shall not be below 7.5.(3) Corrosion inhibition test. The reserve alkalinity of antifreeze as determined by ASTM D-1121 (2011) shall be reported. The corrosion inhibitive properties of antifreeze shall be determined by ASTM D-1384 Test Method (2012). The average weight loss of each metal coupon shall not exceed the maximums stated as follows: copper 10 mg, solder 30 mg, brass 10 mg, steel 10 mg, cast iron 10 mg, and aluminum 30 mg.(4) Freezing point test. The freezing point of antifreeze shall be determined by the ASTM designation D-1177 (2016) test. The freezing points of a 50% concentrated antifreeze and 50% distilled water solution shall not be above -26°F or -32°C.