1、Manual of Petroleum Measurement StandardsChapter 12Calculation of Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPart 4Calculation of Base Prover Volumes by the Waterdraw MethodFIRST EDITION, DECEMBER 1997REAFFIRMED
2、, MARCH 2009Manual of Petroleum Measurement StandardsChapter 12Calculation of Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPart 4Calculation of Base Prover Volumes by the Waterdraw MethodMeasurement CoordinationFI
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14、tten permission from the publisher. Contact the Publisher, API Publishing Services, 1220 L Street, N.W., Washington, D.C. 20005.Copyright 1997 American Petroleum InstituteiiiFOREWORDThis five-part publication consolidates and presents standard calculations for meteringpetroleum liquids using turbine
15、 or displacement meters. Units of measure in this publicationare in International System (SI) and United States Customary (USC) units consistent withNorth American industry practices.This standard has been developed through the cooperative efforts of many individualsfrom industry under the sponsorsh
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18、hould be submitted to the Measurement Coordinator,American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005.vCONTENTSPageSECTION 2CALCULATION OF PETROLEUM QUANTITIES USING DYNAMIC MEASUREMENT METHODS AND VOLUMETRIC CORRECTION FACTORSPART 4CALCULATION OF BASE PROVER VOLUMES BY THE WAT
19、ERDRAW METHOD1 PURPOSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 APPLICATION OF PART
20、 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ORGANIZATION OF STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1 Part 1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . . . . 14.2 Part 2Measurement Tickets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.3 Part 3Proving Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.4 Part 4Calculation of Base Prover Volumes by the Water
22、draw Method . . . . . . 24.5 Part 5Calculation of Base Prover Volumes by the Master Meter Method . . . . 25 REFERENCED PUBLICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FIELD OF APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . . . . . . . . . . . 26.1 Applicable Liquids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.2 Base Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 PRECISION, ROUNDING, AND
24、DISCRIMINATION LEVELS. . . . . . . . . . . . . . . . 37.1 Rounding of Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.2 Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 DEFINITI
25、ONS AND SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.2 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、. . . . . . . . . . . . . . . . . . . . . . . . . . 49 CALIBRATION REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59.1 Displacement ProversUnidirectional Design . . . . . . . . . . . . . . . . . . . . . . . . . . 59.2 Displacement ProversBidirectional Desi
27、gn . . . . . . . . . . . . . . . . . . . . . . . . . . . 59.3 Open Tank Provers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59.4 Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 610 CORRECTION FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 610.1 Water Density Correction Factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 610.2 Prover Test Measure Correction Factors. . . . . . . . . . . . . .
29、. . . . . . . . . . . . . . . . . . 610.3 Combined Correction Factor for Effect of Temperature on Steel . . . . . . . . . . . . 811 RECORDING OF FIELD DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 811.1 Field Data Discrimination Levels . . . . . . . . . . . .
30、 . . . . . . . . . . . . . . . . . . . . . . . . . 811.2 Discrimination Level Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Page12 PROVER VOLUME CALCULATION SEQUENCE AND DISCRIMINATION LEVELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.1 Displacement Provers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.2 Open Tank Provers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1913 B
32、ASE PROVER VOLUME CALCULATION EXAMPLES . . . . . . . . . . . . . . . . . . . 2613.1 Displacement ProverConventional Unidirectional Pipe Design . . . . . . . . . . 2613.2 Displacement ProverConventional Bidirectional Pipe Design. . . . . . . . . . . . 3313.3 Displacement ProverUnidirectional Small Vo
33、lume Prover Design . . . . . . . . 4313.4 Open Tank Prover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50FiguresDisplacement Provers1 Prover Calibration Flow Chart, Waterdraw Method for Displacement Provers. . . . 162 Waterdraw Method of Bidirectio
34、nal Displacement Provers Using Bottom Filling Test Measures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 Waterdraw Method of Unidirectional Pipe Prover Using Top Filling Measures . . . 174 Waterdraw Method of Small Volume Prover Using Top Filli
35、ng Test Measures . . . 18Open Tank Provers5 Prover Calibration Flow ChartWaterdraw Method for Open Tank Provers . . . . . 236 Waterdraw Method of Open Tank Provers Using Top Filling Test Measures . . . . . 247 Waterdraw Method of Open Tank Provers Using Bottom Filling Test Measures . . 25Tables1 Dim
36、ensional Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Temperature Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Pressure Discrimination Levels. . . . . . . . . . . . . . . . . . . . . . . .
37、 . . . . . . . . . . . . . . . . . . 84 Water Compressibility Factor Discrimination Levels. . . . . . . . . . . . . . . . . . . . . . . . . 85 Coefficients of Thermal Expansion for Steel (Gc, Ga, Gcm, Gl). . . . . . . . . . . . . . . . 96 Modulus of Elasticity Discrimination Levels . . . . . . . . .
38、 . . . . . . . . . . . . . . . . . . . . . . 97 Correction Factor Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Volume Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10vi1Chapter 12Calculation of
39、Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPART 4CALCULATION OF BASE PROVER VOLUMES BY THE WATERDRAW METHOD1 PurposeWhen most of the older standards were written, mechani-cal desk calculators were widely used fo
40、r calculating mea-surement documentation, and tabulated values were usedmore widely than is the case today. Rules for rounding andthe choice of how many figures to enter in each calculationstep were often made on the spot. As a result, different opera-tors obtained different results from the same da
41、ta.This five-part publication consolidates and standardizescalculations pertaining to the metering of petroleum liquids,using turbine or displacement meters, and clarifies terms andexpressions by eliminating local variations of such terms. Thepurpose of standardizing the calculations is that all par
42、tieswill produce the same unbiased answer from the given data.To obtain identical results from the same data, the rules forrounding, sequence, and discrimination of numbers (decimalplaces) have all been defined. 2 ScopeThis document provides standardized calculation methodsfor the quantification of
43、liquids and the determination of baseprover volumes under defined conditions, regardless of thepoint of origin or destination or units of measure required bygovernmental organizations. The criteria contained in thisdocument allows different individuals, using various com-puter languages on different
44、 computer hardware (or manualcalculations), to arrive at identical results using the same stan-dardized input data.This publication rigorously specifies the equations forcomputing correction factors, rules for rounding, thesequence of the calculations, and the discrimination levels ofall numbers to
45、be used in these calculations. No deviationsfrom these specifications are permitted since the intent of thisdocument is to serve as a rigorous standard. 3 Application of Part 4For custody transfer and fiscal applications, provers aredefined as field transfer standards used to calibrate flowmeters fo
46、r the purpose of correcting their indicated volumes. The Base Prover Volume (BPV) of a displacement provermay be determined by several different procedures, two ofwhich are the waterdraw method and the master metermethod. This standard only discusses the calculation proce-dures for the waterdraw cal
47、ibration method.The purpose of standardizing terms and arithmetical proce-dures employed in calculating the base prover volume is toavoid disagreement between the parties involved in the facil-ity. The purpose of Part 4, “Calculation of Base Prover Vol-ume By Waterdraw Method,” is to obtain the same
48、 unbiasedanswer from the same measurement data, regardless of whoor what does the computing. The result of these efforts is toproduce a certified prover volume.A Calibration Certificate serves as the document that statesthe Base Prover Volume (BPV) and also reports the physicaldata used to calculate
49、 that base prover volume.Operational procedures used to calibrate a prover are spec-ified in different sections of API MPMS Chapter 4ProvingSystems.4 Organization of StandardThis standard has been organized into five separate parts.Part 1 contains a complete general introduction to dynamicmeasurement calculations. Part 2 focuses on the calculationof metered quantities for measurement tickets. Part 3 appliesto the calculation of meter factors in proving operations andproving reports. Part 4 applies to the determination of baseprover volumes by the waterdraw method, an
