![]() ![]() Please click here to view License Agreement for Educational Institutions. If you do not agree to the terms of this License Agreement, promptly exit this page This License Agreement, that you understand it and that you agree to be bound by its IMPORTANT-READ THESE TERMS CAREFULLY BEFORE DOWNLOADING THIS DOCUMENT.īy downloading the ASTM Document you are entering into a contract, and acknowledge that Viscosity values not listed but which are within the range given in Table I may be obtained by linear interpolation. The Saybolt Viscosity values obtained from this Table, following the reporting procedure outlined in the Standard Method of Test for Saybolt Viscosity (ASTM Designation: D 88, should be reported to the nearest 0.1 sec for viscosity values below 200 sec and to the nearest whole second for values 200 sec or above. These kinematic viscosity values are based upon the standard value for distilled water of 1.0038 cs at 68 F and are given in increments smaller than are officially measured by, or reported for the Saybolt Universal Viscometer. The viscosity conversion values in this table have been calculated in accordance with the Standard Method for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity (ASTM Designation: D 446). The relationship between Saybolt and kinematic viscosities is linear above 20.0 cs. Conversion values are given for a range of kinematic viscosity from 1.77 to 500 cs. This is the ratio of the time of flow of 200 ml of fluid to the time of flow of 200 ml of water at the same temperature in a standardized Engler viscosity meter.This table gives values for converting kinematic viscosity in centistokes to Saybolt Universal viscosity in seconds at 100 F and at 210 F. For higher viscosities, SSF (Saybolt Seconds Furol) is used. This is the time for 60 millilitres (ml) of fluid to flow through the calibrated orifice of a Saybolt Universal viscometer at a specified temperature, as prescribed by test method ASTM D 88. It is most usually encountered as the centistokes (cSt), equal to 0.01 stokes. One stokes is equal to the viscosity in poise divided by the density of the fluid in grams per cubic centimetre (g This is the CGS unit, equivalent to square centimetres per second (cm2 s–1). KINEMATIC VISCOSITY Stokes (symbol: St) + centiStokes (symbol: cSt) TABLE OF EQUIVALENTSġ pound-force second per square inch (reyn) One poiseuille is 10 poise or 1000 cP, while 1 cP = 1 mPa It is sometimes referred to as the poiseuille (symbol Pl). This is the SI unit of viscosity, equivalent to newton-second per square metre (N Pascal-second (symbol: Pa.s) + milliPascal-second (symbol: mPa.s) SOME TYPICAL DYNAMIC VISCOSITIES (cP at 20☌) Many everyday fluids have viscosities between 0. It is the viscosity of a fluid in which a tangential force of 1 dyne per square centimetre maintains a difference in velocity of 1 centimetre per second between two parallel planes 1 centimetre apart.Įven in relation to high-viscosity fluids, this unit is most usually encountered as the centipoise (cP), which is 0.01 poise. Named after the French physician Jean Louis Marie Poiseuille (1799 – 1869), this is the CGS unit of viscosity, equivalent to dyne-second per square centimetre. Go to Viscosity Units Converter | Viscosity Comparison ChartĭYNAMIC VISCOSITY Poise (symbol: P) + centiPoise (symbol: cP) ![]()
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