Download Flow Measurement. By Square-Edged Orifice Plate Using Corner by W. J. Clark PDF

By W. J. Clark

ISBN-10: 0080112129

ISBN-13: 9780080112121

Movement size by way of Square-edged Orifice Plate utilizing nook Tappings bargains comprehensively with the topic of circulate dimension via pipes through a sq. facet orifice plate utilizing nook tappings. the article is to give in simply readable and acceptable shape a attention of the entire many components thinking about actual size, therefore allowing readers to understand what's inquisitive about reliable circulate metering perform, to layout if wanted their very own installations to predetermined criteria of accuracy, and to make trustworthy tests of latest installations.
The e-book is geared up into 4 elements. half 1 discusses uncomplicated ideas, licensed layout and install stipulations, and urged follow-up upkeep for varied predetermined criteria of accuracy, with designated cognizance given to standards considering the metered fluid, operating stipulations, orifice layout, pipe structure and pipe stipulations. half 2 offers with the sensible software of half I and describes the tactic of utilizing a Flowmeter information Sheet especially designed either to make sure that the varied elements fascinated by actual move measurements are taken into consideration. half III includes a few consultant and well-detailed specimen calculations designed to demonstrate and make clear all facets of the strategy of calculation endorsed partially II. partly IV a large amount of appropriate information at the actual homes of fluids, and lots of tables, graphs and alignment charts are assembled jointly for simple reference whilst making orifice calculations.

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Additional info for Flow Measurement. By Square-Edged Orifice Plate Using Corner Tappings

Sample text

It is least for devices using downstream diverging cones to minimise energy loss due to eddies. Flow Measurement Factors 8. 1 Materials ojConstruction All materials in contact with the working fluid should be unaffected by it. Also materials should be unaffected by the surrounding atmosphere. Both these points should be obvious but are at times forgotten. 2 Accessibility Adequate follow-up maintenance is essential if a flow-measuring installation is to give accurate, reliable service. Such maintenance involves fairly frequent visits to the orifice plate and associated temperature, pressure, pipe drainage or ventage and, where necessary, analysis points.

Taking these factors in turn: (i) Basic Values of Discharge Coefficient (Cb) The following limitations apply to the values given in Fig. , m must'never exceed ... , m must never exceed 0-56 and whenever possible should not exceed The corresponding basic tolerances (Xb) are: For m values up to 0-50 For m values > 0-50 up to 0-56 1-5 in. 0*25 in. 0-02 0-50 0-50 ±0-5% see Fig. 1(iv) and illustrated in Fig. 5, C, under ideal conditions for any given value of m, has a constant basic value* Cb for values of ReD above the Constancy Limit.

Tolerances on the values of k are given in Fig. 28x. T h e data in Fig. 28a to 1 and x have been selected as the most reliable after a critical examination of all available published data; for fur­ ther information see Reference 14. Note that the method of calculating the overall coefficient k from the values for the components has been found to give adequate accuracy for all mixtures of gases; some information on H 2 /CO, CH 4 /H 2 , CH 4 /C 2 H 6 is given in Reference 15. See also Part 3, note to Example 4, on the method of dealing with the effect of small changes in gas composition on k.

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