Orifice viscometer diagram


  • Over 20 Years of Design & Fabrication Experience From Wellhead to Pipeline
  • Viscosity test of bitumen- Step by Step Procedure and Significance
  • Types of Orifice Plates Used in Flow Measurement
  • Difference between redwood viscometer no.1 and redwood viscometer no.2
  • Saybolt Viscometer
  • Over 20 Years of Design & Fabrication Experience From Wellhead to Pipeline

    Beaker Procedure for Viscosity test of bitumen First of all pass the emulsion sample with the help of micron sieve and pour it to the beaker. Viscometer machine is cylinder like structure and consist of a hollow tube at the center. Viscosity test of bitumen The hollow tube of viscometer is filled with sample and exterior part with water for water bath.

    Cover lid of viscometer and join two thermometers to measure the temperature of the sample and water as well.

    Now, stirr the sample with the help of movable lid of viscometer and make the temperature of sample up to 50 degree Celsius. The sample should be collected in 60 ml receiving Flask. Take a stopwatch and note the time required to fill the flask up to a horizontal line as shown in the figure above.

    Yes, we have completed, the time taken to fill the sample up to the horizontal line of flask is the value of viscosity of the bitumen. Now note down in format, Format for Viscosity test of bitumen Types of emulsion :- Time taken to fill flask :- Significance for Viscosity test of bitumen The viscosity of bitumen binder is its most important physical characteristic, it defines Inverse of fluidity and is a measure of resistance to flow.

    The right choice of bitumen can be made after Owing its Viscosity because of the following reasons:. The degree of fluidity of the binder at the application temperature determines the quality of mixing binder of lower Viscosity results in lubrication only. Binder of reasonable Viscosity results in the uniform film coat. It results in a heterogeneous mixture because of less resistance for mixing.

    Binder of higher viscosity requires more comparative effort and may result in a heterogeneous mixer. Precaution while testing bitumen The temperature should be noted carefully.

    Standard size of flask should be used. Emulsion should be filled in viscometer up to the the lower tube. Make sure no sample should be out of flask while extracting emulsion from viscometer.

    The horizontal line of the flask should be noted carefully to take accurate time of filling. Read Also,.

    Viscosity test of bitumen- Step by Step Procedure and Significance

    The saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a 60cc container. The device used for measurement of viscosity is known as viscometer. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. The units of viscosity is poise and centipoise. Since the water has a viscosity of 1 cp at 20 degree Celsius.

    Kinematic viscosity is defined as ratio of dynamic viscosity to the density of the fluid. Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and Bitumen emulsions. The testing procedure is quite similar to the capillary-tube viscometers where efflux time of a specified volume of fluid is measured through fixed orifice at the bottom of a cup to represent the viscosity of the fluid.

    Since the viscosity of Newtonian liquid are independent of dimensions of viscometer used, it is possible to convert the efflux times to kinematic viscosities by conversion charts or by formulas suggested by the equipment manufacturers.

    To obtain high accuracy the liquid holding vessel and orifice are temperature controlled by immersing them in a thermostatically controlled bath.

    The saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products.

    There are three types of orifices available-Universal, Furol, Asphalt. The furol and asphalt orifices, respectively, have an efflux time of approximately, one-tenth and one-hundredth that of the universal orifice. The cup orifice combination should be selected to provide an effllux time within the range of 20 to seconds. Of these types, the universal orifice saybolt universal viscometer is most commonly used and its efflux time is designated as saybolt universal seconds SUS. The universal viscometer measures the time required for 60 cc of sample fluid to flow out through an orifice having dimensions of 0.

    Advantages It has a digital meter to measure temperature and so reading is more accurate and precise. The coils wrap around the container uniformly so uniform temperature can be obtained.

    Viscosity can be directly compared for two or more liquids. Disadvantages The main disadvantage of the capillary tube viscometer is the errors that arise due to the variation in the head loss and other parameters.

    Efflux cup viscometer have some inherent inaccuracies Application Efflux viscometer are most commonly used fieldwork to measure the viscosity of oil , syrups, varnish, paints.

    It is used for testing petroleum products. Share With Your Friends.

    Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and Bitumen emulsions. The testing procedure is quite similar to the capillary-tube viscometers where efflux time of a specified volume of fluid is measured through fixed orifice at the bottom of a cup to represent the viscosity of the fluid. Since the viscosity of Newtonian liquid are independent of dimensions of viscometer used, it is possible to convert the efflux times to kinematic viscosities by conversion charts or by formulas suggested by the equipment manufacturers.

    Types of Orifice Plates Used in Flow Measurement

    To obtain high accuracy the liquid holding vessel and orifice are temperature controlled by immersing them in a thermostatically controlled bath. The saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products. There are three types of orifices available-Universal, Furol, Asphalt. The furol and asphalt orifices, respectively, have an efflux time of approximately, one-tenth and one-hundredth that of the universal orifice.

    This pressure drop is measured and is used to calculate the flow rate of the fluid or gas.

    Difference between redwood viscometer no.1 and redwood viscometer no.2

    Types of Orifice Fitting There are three major kinds of fittings as follows: Single Chamber As the name suggests, it consists of a single chamber designed for the precise measurement of the flow rate of a fluid or gas. Dual Chamber It is installed in conjunction with downstream and upstream sections, and comes with O-ring seals, eliminating the problem of maintaining the gasket in the device.

    In addition to this, a valve seal is also available for dual chamber orifice fitting. It also offers protection from toxic liquids and ensures the longevity of the equipment. It is frequently used more than any other flow meter.

    Saybolt Viscometer

    The orifice consists of a thin metal plate with a straight hole drilled in it. When a fluid passes through an orifice, the flow is often less than the amount calculated. The assumption is that the energy is conserved and the flow distributing through the orifice is uniform and parallel. Orifice Plates are normally mounted between a set of Orifice Flanges and are installed in a straight run of smooth pipe to avoid disturbance of flow patterns from fittings and valves.

    Orifice plates cover a wide range of applications including fluid and other operating conditions. They give an acceptable level of uncertainties at lowest cost and long life without regular maintenance. Concentric Bore — The most common orifice plate is the square-edged, concentric bored design.

    It is usually made of stainless steel.


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