Api Medicion Fluidos

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STD.API/PETRO MPMS 14.b-ENGL

19’13 IBI 0732270 U L Z 2 1 8 3 075

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Date of Issue: August 5,1998 Affected Publication: API MPMS Chapter 14.6, Continuous Density Measurement, Second Edition, April 1991

ERRATA
Several errata have beenfound in API MPMS Chapter 14.6 “ C O ~ ~ ~ ~ U O U MeasureDensity S ment,” dated April 1991, Second Edition. Known erram are listed below: Page7,section 14.6.6.6.2. ïñe second equation on this page, which is thejìrst equationfor variable C,, is only for evacuated weight pycnometers. The C,equation found on page 45 is onlyfor airfilled weight calculations, as described in section 14.6.6.6.3, on page 9. Page 25, section 14.6.14.8, steps c, ri, and e. The conversion factors listed here should not be used To obtain appropriateconversionfactors with more signifcant digits, refer to thefollowing docwnent (or its f successor): “Standadfor Use o the International System of Units (SI):The Modem Memk System” (IEWASTM SI-IO;1997). IEEE SrandantF Coodimthg Committee I and ASTM Committee E-43, published by Institute of Electrical and Electronics 4 Engineers, Inc.. 345 h t 47th St., New Y & NY 10017. This document has replaced o ASTM E380 andAh‘SMEEE Std 268-1992. Page 41, equation. Datum pressure, Pdp is genemiiy equal to 14.6Wpsia thmughout the document, and is never equal to local atmosphericpressure. However; in the equation listed on page 41, P d is equal to 0.0 psia. Page 42. The average water &ta shown on this page is not relevant.

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Pages 42,43, and 44. On page 42, C,, was incorrectlycalculated using the air-filled weight calculations,as described in section 14.6.6.4.3.It was not calculated using the 14.6.6.6.2 evacuatedweight method. Aditiornliy, the valuesfor shown on pages 42.43, and 44 are not correct. Futhemwre,for the Test A and Test B Data tables, only Weigh N0.s 2, 4, IO, 12, 17 are signijicant. ïñe rest of the Weighsare of little use. See thefollowing two tablesfor corrected values:

Test B

COPYRIGHT 2003; American Petroleum Institute

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Data

_. .I

2 4 10 12 17

50 200 800 1000 1500

77.5 77.5
77.5 77.5
77.4

2360.26 2360.89 2363.46 2364.30 2366.45

994.76 995.39 997.96 998.80 1000.95

0.9970810 0.9975464 0.9993975 1.0000108 1.0015514

997.67 997.84 998.56 998.79 999.40

995.45 995.62 996.34 996.57 997. i8

In the above Test A and Test B tables, thefollowing values also apply: Pd = 14.696 psia datum pressure, E, =2.88E-5 per degree Fahrenheit, pA= 0.001I75 g / c d for Test A calculated by using the air density equation on page 45 at 79"E pA= 0.001I79 g/cm'for Test B calculated by using the air density equation on page 45 at 77"E C,, = 0.99985for both Test A and Test B. Page 45. ïñe equationfor K,is incorrect. The value 58.4772 should read: 58.47727. The h t line of the equation should start with a divisionsign, not a multiplicationsign. The corrected version is as shown here:

-

K, = isothermal compressibility of water at 14.696 psia and T,, in degrees Celsius
= [50.88496 + (6.163813 x l W ) ( T f ) (1.459187 x lP3)(Tf2) +

i -

+ (20.08438 x lW)(T3)- (58.47727 x lW)(Tp)+ (410.411 x 10-lz)(T:)] { [ 1 + (19.67348 x 10-3)(Tf)]( 14.50377 x l W ) }

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STD.API/PETRO
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MPNS i 4 - b - E N G L 1791

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0732290 0!,2211AC YLiö E

,.-:.+

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Page 48. Replace the existing K,equation with the same corrected version, above,for p g e 45. Replace the Kipequation with the correct...