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Standard Test Method for Calculation of Viscosity-Gravity Constant (VGC) of Petroleum Oils
Automaticky preložený názov:
Štandardná skúšobná metóda pre výpočet viskozity-Gravity konštanta (VGC) z minerálnych olejov
NORMA vydaná dňa 1.6.2014
Označenie normy: ASTM D2501-14
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2014
Kód tovaru: NS-20553
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
aromatic, density, kinematic viscosity, paraffinic, ICS Number Code 75.080 (Petroleum products in general)
Significance and Use | ||||||||||||
4.1 The viscosity-gravity constant (VGC) is a useful function for the approximate characterization of the viscous fractions of petroleum.2 It is relatively insensitive to molecular weight and is related to a fluids composition as expressed in terms of certain structural elements. Values of VGC near 0.800 indicate samples of paraffinic character, while values close to 1.00 indicate a preponderance of aromatic structures. Like other indicators of hydrocarbon composition, the VGC should not be indiscriminately applied to residual oils, asphaltic materials, or samples containing appreciable quantities of nonhydrocarbons. |
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1. Scope | ||||||||||||
1.1 This test method covers the calculation of the viscosity-gravity constant (VGC) of petroleum oils1.2 Annex A1 describes a method for calculating the VGC from Saybolt (SUS) viscosity and relative density. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3.1 The SI unit of kinematic viscosity is mm2/s. 1.3.2 Exception—Fahrenheit temperature units are used in this practice because they are accepted by industry for the type of legacy conversions described in this practice. 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||
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