API MPMS 11.4.1 pdf free download

API MPMS 11.4.1 pdf free download.Manual of Petroleum Measurement Standards Chapter 11—Physical Properties Data Section 4—Properties of Reference Materials Part 1—Density of Water and Water Volumetric Correction Factors for Water Calibration of Volumetric Provers.
4 Definitions 4.1 density, absolute The density of a solid or liquid substance at a specified temperature is the mass of the substance occupying unit volume at the specified temperature. Density as so defined is sometimes referred to as “true density” or “density in vacuo.” When reporting density, the units of mass and volume used and the temperature of the determination must be stated (for example, grams per milliliter at t degrees C). 4.2 correction for temperature on liquid CTL Compensates for the effect of temperature on a liquid. 4.3 correction for pressure on liquid CPL Compensates for the effect of pressure on a liquid. 4.4 correction for temperature and pressure on liquid CTPL Volume correction for the effect of temperature and pressure on the density of a liquid (CTPL = CTL × CPL). 4.5 correction for temperature difference of water CTDW Correction for the effect of the difference in temperature of the water between the prover and the test measure during the prover calibration. 4.6 compressibility of liquid F The change in volume per unit of volume of a liquid caused by a unit change in pressure at constant temperature.5 Significance and Use A prior standard (API MPMS 11.2.3, 1984), which the first edition of this Standard replaced, was based on the internationally accepted work of Wagenbreth and Blanke, which produced a density of 999.012 kg/m 3 at 15.5556 °C (60 °F) and 101.325 kPa (14.696 psia). In 1994, Patterson and Morris published a paper proposing a new equation based on their laboratory data of VSMOW (see Annex B), which was accepted by the U.S. National Institute of Standards and Technology (NIST). This standard, based on the Patterson and Morris work, is applicable between 1 °C and 40 °C (33.8 °F and 104 °F) at standard pressure; 101.325 kPa (14.696 psia). This standard also provides an equation for the compressibility of water based on a compressibility equation contained in a 2001 Tanaka paper. The range of applicability is for gauge pressures of 0 kPa to 10,000 kPa (0 psig to 1450 psig) for water temperatures between 1 °C and 40 °C (33.8 °F and 104 °F). Specific applications include: — determination of base prover volumes (BPV);— determination of pycnometer base volumes (PBV); — conversions between liquid density units; — calculation of water content based on fluid and water density. For applications outside the range of applicability of this standard, the more comprehensive water density standard by Wagner and Pruss (2002) is recommended. 6 Implementation Procedures 6.1 Representative Density Values Representative density values are presented, at standard pressure [101.325 kPa (14.696 psia)], for U.S. customary (USC) and International System of Units (SI) units in Annex A for calculation verification purposes. 6.2 Absolute Density of Water This standard is based on the Patterson and Morris work for water density at standard pressure, which is applicable for the temperature range 1 °C to 40 °C (33.8 °F to 104 °F).6.4 Correction for Pressure on Water (CPL) Equation 7 provides a correction for the effects of pressure on water. While it is effective at low pressures, at pressures of 800 kPa or so, the calculated value will exhibit biases relative to accepted water property predictive equations, such as those provided by the International Association for the Properties of Water and Steam that are noticeable within the discrimination identified for CPL in Table 2. CPL is also affected by water temperature. The given equation is effective in the range of 0 °C to 40 °C (32 °F to 104 °F). Beyond these limits of pressure and temperature, the provided CPL calculation uncertainty and/or bias increases significantly and may not meet metrological requirements. The density of deaerated water has been given at an absolute pressure of 101.325 kPa (14.696 psia). Water is slightly compressible, so a correction must be made for pressures other than standard pressure.API MPMS 11.4.1  pdf download.