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ASTM D2161-19
Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity
NORMA vydaná dňa 1.5.2019
Informácie o norme:
Označenie normy: ASTM D2161-19
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.5.2019
Kód tovaru: NS-949123
Počet strán: 25
Približná hmotnosť: 75 g (0.17 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D2161-19 :
Keywords:
kinematic viscosity, Saybolt furol, Saybolt universal,, ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)
Doplňujúce informácie
| Significance and Use | ||||||
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4.1 At one time the petroleum industry relied on measuring kinematic viscosity by means of the Saybolt viscometer, and expressing kinematic viscosity in units of Saybolt Universal Seconds (SUS) and Saybolt Furol Seconds (SFS). This practice is now obsolete in the petroleum industry. 4.2 This practice establishes the official equations relating SUS and SFS to the SI kinematic viscosity units, mm2/s. 4.3 This practice allows for the conversion between SUS and SFS units and SI units of kinematic viscosity. |
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| 1. Scope | ||||||
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1.1 This practice2 covers the conversion tables and equations for converting kinematic viscosity in mm2/s at any temperature to Saybolt Universal viscosity in Saybolt Universal seconds (SUS) at the same temperature and for converting kinematic viscosity in mm2/s at 122 °F and 210 °F (50 °C and 98.9 °C) to Saybolt Furol viscosity in Saybolt Furol seconds (SFS) at the same temperatures. Kinematic viscosity values are based on water being 1.0034 mm2/s (cSt) at 68 °F (20 °C). 1.2 If a method other than Test Method D445 is used to generate the kinematic viscosity data, apply appropriate relative-bias correction factors as found in the precision section of that method, before performing the calculations of this practice. Note 1: The equations in D2161 were originally empirically derived
using data from both D445 and
the Saybolt viscometer method. Therefore, it is conceivable that an
error could result if the kinematic viscosities used are not
bias-corrected to D445
results. It is recommended that kinematic viscosity be reported in
millimetres squared per second, instead of Saybolt Universal
Seconds (SUS) or Saybolt Furol Seconds (SFS). This method is being
retained for the purpose of calculation of kinematic viscosities
from SUS and SFS data that appear in past literature. One
millimetre squared per second (mm2/s) equals one
centistoke (cSt), which is another unit commonly found in older
literature.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for reference information purposes only. The SI unit of kinematic viscosity is mm2/s. 1.3.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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. |
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| 2. Referenced Documents | ||||||
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