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ASTM D4953 - 20
Standard Test Method for Vapor Pressure of Gasoline and Gasoline-Oxygenate Blends (Dry Method)
| Fecha edición: |
2020-05-01
En Vigor
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| Idiomas disponibles: | Inglés |
| Resumen: | |
| Keywords: | dry method; gasoline; gasoline-oxygenate blend; spark-ignition engine fuel; vapor pressure; volatility; |
| Scope: | 1.1 This test method covers and is applicable to gasolines and gasoline-oxygenate blends with a vapor pressure range from 35 kPa to 100 kPa (5 psi to 15 psi) (see Note 2). This test method, a modification of Test Method D323 (Reid Method), provides two procedures to determine the vapor pressure (Note 1) of gasoline and gasoline-oxygenate blends. Note 1: Because the external atmospheric pressure is counteracted by the atmospheric pressure initially present in the air chamber, this vapor pressure is an absolute pressure at 37.8 °C (100 °F) in kilopascals (pounds-force per square inch). This vapor pressure differs from the true vapor pressure of the sample due to some small vaporization of the sample and air in the confined space. Note 2: Vapor pressure of gasoline or gasoline-oxygenate blends below 35 kPa (5 psi) or greater than 100 kPa (15 psi) can be determined with this test method but the precision and bias (Section 11) do not apply. For materials with a vapor pressure greater than 100 kPa (15 psi), use a 0 kPa to 200 kPa (0 psi to 30 psi) gauge as specified in the annex of Test Method D323. 1.2 Some gasoline-oxygenate blends may show a haze when cooled to 0 °C to 1 °C. If a haze is observed in 9.4, it shall be indicated in the reporting of results. The precision and bias statements for hazy samples have not been determined (see Note 7). 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warnings are given in 7.5, 8.4.1, 8.5.1, 9.1, A1.1, and A1.1.3. 1.5 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. |
| ICS: | 75.160.20 - Combustibles líquidos |
| CTN: | D02.08 - D02.08 |
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Anulaciones Normas |
Anula a D4953-15 |
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Otras Relaciones |
Es referenciada por D5797-21 Es referenciada por D5191-22 Es referenciada por D8275-22 Es referenciada por D6201-19A Es referenciada por D0323-20A Es referenciada por D7344-17A Es referenciada por D8236-18 Es referenciada por D8011-19 Es referenciada por D6378-22 Es referenciada por D5842 - 23 Es referenciada por D7345 - 23 Es referenciada por D8076 - 24 Es referenciada por D86 - 23ae2 Es referenciada por D4814 - 25 Es referenciada por D6227 - 24a Es referenciada por D5798 - 25 Es referenciada por D7566 - 24d Es referenciada por D5482-20A |










