These viscometers include glass capillaries, capillary holders, a temperature control unit, a temperature-controlled bath, a thermometer, a bath liquid suitable for the measuring temperature, and a time-measuring device that meets the standard’s required specifications. Defined Oswald-type, suspended-level type, and reverse-flow capillaries which are specified in the ASTM D445 standard can be used for different samples and viscosity ranges.

Consequently, correct storage and careful cleaning of the capillaries are essential.īy default, petroleum samples can be measured with manual or automated glass capillary viscometers.

Apart from particles in the sample, dust particles inside the capillary can be the cause of faulty measurements. The pore size of the required filtering screen is 75 µm, so particles larger than 75 µm need to be filtered. Filtering is required if the sample contains fibers or solid particles. Particles are one of the most common error sources. Although parties still have a choice of standard, they should carefully consider the implications of using the older standard if, in the future, a party may need to assert a landowner liability defense under CERCLA. For opaque liquids, two reverse-flow capillaries are required to determine the kinematic viscosity. the inquiry meets one of the designated standards, namely ASTM E1527-05, ASTM E2247-08, 9. MDOT SHA>Residual fuel oils and opaque liquids are homogenized by various heating and stirring steps, and particles must be removed with the help of a preheated filter. If the sample fluid contains fibers or particles, an additional filtration step is required.

Transparent liquids need to be homogenized and degassed in an ultrasonic bath.

The ASTM D445 procedure can be applied to both transparent and opaque liquids :

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