API MPMS 4.9.3 2010 pdf download.Manual of Petroleum Measurement Standards Chapter 4—Proving Systems Section 9—Methods of Calibration for Displacement and Volumetric Tank Provers Part 3—Determination of the Volume of Displacement Provers by the Master Meter Method of Calibration.
2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Manual of Petroleum Measurement Standards (MPMS) Chapter 4.2, Displacement Provers API MPMS Chapter 4.4, Tank Provers API MPMS Chapter 4.6, Pulse Interpolation API MPMS Chapter 4.8, Operation of Proving Systems API MPMS Chapter 4.9.1-2005, Methods of Calibration for Displacement and Volumetric Tank Provers, Part 1— Introduction to the Determination of the Volume of Displacement and Tank Provers API MPMS Chapter 4.9.2-2005, Methods of Calibration for Displacement and Volumetric Tank Provers, Part 2— Determination of the Volume of Displacement and Tank Provers by the Waterdraw Method of Calibration API MPMS Chapter 12.2.3-1998, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 3—Proving Reports API MPMS Chapter 12.2.5-2001, Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors, Part 5—Base Prover Volume Using Master Meter Methods NOTE For readability, references to API Manual of Petroleum Measurement Standards are abbreviated as API MPMS. Reference to parts of chapters will follow the convention of “Chapter.Section.Part.Subpart”. For example, this standard, American Petroleum Institute Manual of Petroleum Measurement Standards, Chapter 4, Section 9, Part 3, would be called API MPMS Chapter 4.9.3. 3 Terms and Applications 3.1 Terms No definitions are unique to this document. Unfamiliar terms not explained in adjoining text are found in the publications listed in Section 2 and the Bibliography, chiefly API MPMS Ch. 1, API MPMS Ch. 4.9.1, and API MPMS Ch. 12.2.
3.2 Applications 3.2.1 General API MPMS Ch. 4.9.1 is the introduction and discusses the provers, master meters, related equipment and general troubleshooting applicable to all the different methods of prover calibration. Information contained in API MPMS Ch. 4.9.1 is not repeated in this standard. Detailed calculation procedures are not included in this standard. The reader is referred to the latest edition of the API MPMS Ch. 12.2.5 for the complete calculation details applicable to this standard. Accordingly, API MPMS Ch. 4.9.1, API MPMS Ch. 4.9.3, and API MPMS Ch. 12.2.5 together are needed to conduct a calibration of a displacement prover by the master meter method. The technique used to calibrate the master meter introduces various levels of uncertainty into the petroleum measurement hierarchy. While this does not necessarily mean the master meter method is less accurate than other methods, the calibration chain is longer than that of a direct method. A prover calibration is initially performed at the manufacturing plant after the field prover is built and often again after it has been installed at the operating facility. From this time forward, periodic calibrations occur. See API MPMS Ch. 4.8 and API MPMS Ch. 4.9.1 for more discussion on the necessity for and frequency of subsequent field prover calibrations. 3.2.2 Applicable Liquids Performing a prover calibration requires a liquid as a medium. This standard applies to liquids that for all practical purposes are considered to be clean, single-phase, homogeneous, and Newtonian at metering conditions. The application of this standard is limited to liquids for which API MPMS Ch. 11.1 is applicable and water. To accomplish this, the density of a liquid shall be determined by the appropriate technical standard, by use of the proper density correlation or by use of the correct equations of state.
For fluids, such as liquid hydrocarbons, having a vapor pressure greater than atmospheric pressure at base temperature, the base pressure shall be the equilibrium vapor pressure at base temperature. For liquid applications, base conditions may change from one country to the next due to governmental regulations. Therefore, it is necessary that the base conditions be identified and specified for standardized volumetric flow measurement. 3.2.4 Applicable Provers The field prover shall be a displacement prover; this standard shall not apply to a field tank prover. The master prover may be a displacement or tank prover. Volume of the master prover shall be established in accordance with any approved API MPMS direct method. Volume of the master prover shall not be established by the Master Meter Method because the calibration chain is longer using the Master Meter Method.