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

SECOND EDITION, JULY 2018

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Foreword

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Contents

Page

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

5 Significance and Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

6 Implementation Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

6.1 Representative Density Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

6.2 Absolute Density of Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

6.3 Correction for Temperature on Water (CTL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

6.4 Correction for Pressure on Water (CPL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6.5 Correction for Temperature and Pressure on Liquid (CTPL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6.6 Flowing Density (ρtp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6.7 CTDW Correction Factor for Volumetric Provers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6.8 Other Influence Factors on Water Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7 Discrimination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

8 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

8.1 Water Density (USC Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

8.2 CTDW (USC Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.3 Water Density (SI Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.4 CTDW (SI Units). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Annex A (informative) Representative Density Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Annex B (informative) Reference Standard Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Annex C (informative) Basis for Water Density Equation Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Annex D (informative) Uncertainty Calculations for CTL, CPL, CTPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Tables

1 Reference Water Densities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Significant Digits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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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

1. Introduction

   
   

   This standard specifies the density of water equation to be used in all applicable API MPMS standards. It also specifies the volume correction factor equation for water and demonstrates its use for water calibration of provers and pycnometers.

   
   

2. Scope

   
   

   This standard is applicable to all API standards that use the density of water or its volume correction factors.

   
   

3. 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 MPMS Chapter 11.5 (all parts), Density/Weight/Volume Intraconversions

H. Wagenbreth and H. Blanke, “The Density of Water in the International System of Units and in the International Practical Temperature Scale of 1968,” Mitteilungen der Physikalish-Technischen Bunde-sanstalt (PTB–Mitt), 412-415, June 1971.

G.S. Kell, Journal of Chemical Engineering Data, 1967, 12, 66–69; ibid, 1975, 20, 97–105.

N. Bignell, “The Effect of Dissolved Air on the Density of Water,” Metrologia, 1983,19, 57–59.

J.B. Patterson and E.C. Morris, “Measurement of Absolute Water Density,” Metrologia, 31, 277–288, 1994.

M. Tanaka, G. Girard, R. Davis, A. Peuto, and N. Bignell, “Recommended table for the density of water between 0 °C and 40 °C based on recent experimental reports,” Metrologia, 38, 301–309, 2001.

W. Wagner and A. Pruss, “The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General Scientific Use,” Journal of Physical and Chemical Reference Data, 31, 2, 387–535, 2002.

World Health Organization, Guidelines for Drinking-water Quality, 4th Edition, 2011. ASTM D1193–2006 1, Specification for Reagent Water

1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428, www.astm.org.