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ASTM D2270-10(2016)
Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 °C and 100 °C
Automaticky přeložený název:
Běžná praxe pro výpočet viskozitní index od kinematická viskozita při 40 ° C & # x2009; & # xb0 C a 100 & # x2009; & # xb0 C
NORMA vydána dne 1.1.2016
Informace o normě:
Označení normy: ASTM D2270-10(2016)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.1.2016
Kód zboží: NS-631924
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D2270-10(2016) :
Keywords:
kinematic viscosity, viscosity index,, ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)
Doplňující informace
| Significance and Use | ||||||||||||
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4.1 The viscosity index is a widely used and accepted measure of the variation in kinematic viscosity due to changes in the temperature of a petroleum product between 40 °C and 100 °C. 4.2 A higher viscosity index indicates a smaller decrease in kinematic viscosity with increasing temperature of the lubricant. 4.3 The viscosity index is used in practice as a single number indicating temperature dependence of kinematic viscosity. 4.4 Viscosity Index is sometimes used to characterize base oils for purposes of establishing engine testing requirements for engine oil performance categories.6 |
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| 1. Scope | ||||||||||||
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1.1 This practice2 covers the procedures for calculating the viscosity index of petroleum products, such as lubricating oils, and related materials from their kinematic viscosities at 40 °C and 100 °C. Note 1: The results obtained from the calculation of
1.2 This practice does not apply to
petroleum products with kinematic viscosities less than 2.0
mm2/s at 100 °C. Table 1 given in this practice applies
to petroleum products with kinematic viscosities between
2 mm2/s and 70 mm2/s at 100 °C. Equations are
provided for calculating viscosity index for petroleum products
having kinematic viscosities above 70 mm2/s at
100 °C.
1.2.1 In cases where kinematic viscosity data are not available at temperatures of 40 °C and 100 °C, an estimate may be made of the viscosity index by calculating the kinematic viscosity at temperatures of 40 °C and 100 °C from data obtained at other temperatures. Such viscosity index data may be considered as suitable for information only and not for specification purposes. See Test Method D341, Annex A1. 1.3 The kinematic viscosity values are determined with reference to a value of 1.0034 mm2/s at 20.00 °C for distilled water. The determination of the kinematic viscosity of a petroleum product shall be carried out in accordance with Test Methods D445, D7042, IP 71, or ISO 3104. 1.3.1 If Viscosity Index calculated for a given sample using kinematic viscosity measurements from different test methods are in disagreement, the values calculated from Test Method D445 measurements shall be accepted. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4.1 The values stated in SI units are to be regarded as the standard. For user reference, 1 mm2/s = 10-6m 2/s = 1 cSt. 1.5 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. |
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| 2. Referenced Documents | ||||||||||||
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