BS ISO 91:2017 pdf download.Petroleum and related products – Temperature and pressure volume correction factors (petroleum measurement tables) and standard reference conditions.
This document refers to temperature volume correction factors, which allow users to convert volumes, measured at ambient conditions, to those at reference conditions for transactional purposes. This document also refers to compressibility factors required to correct hydrocarbon volumes measured under pressure to the corresponding volumes at the equilibrium pressure for the measured temperature.
Table 1 shows the defining limits and their associated units of correction factors referenced in this document for crude oil, refined products and lubricating oils. These values are shown in bold italics. Also shown in the table are the limits converted to their equivalent units (and, in the case of the densities, other base temperatures). Table 2 shows defining limits of correction factors for light hydrocarbons (natural gas liquids and liquefied petroleum gases).
This document excludes specifying standard reference conditions for natural gas which are given in
ISO 13443I1[
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 11.1-2004’)/Adjunct to ASTM
D1250-042)/Adjunct to IP 200/04, Temperature and Pressure Volume correction Factors for Generalized
Crude Oils, Refined Products, and Lubricating Oils/Addendum 1-2007
API MPMS Chapter 11.2.2-1986, Compressibility Factors for Hydrocarbons: 0.350-0.637 Relative Density (60 °F/60 °F) and -50 °Fto 140 °FMetering Temperature/Errata lune 1996
API MPMS Chapter 1 1.2.2M-1986, Compressibility Factors for Hydrocarbons: 350—637 Kilograms per Cubic Metre Density (15 °C) and -46 °C to 60 °C Metering Temperature
API MPMS Chapter 1L2.4-2007/GPA Technical Publication TP-27-2007, Temperature Correction for the Volume of NGL and LPG, Tables 23E, 24E, 53E, 54E, 59E, and 60E
API MPMS Chapter 11 •53) Part 1-2009/Adjunct to ASTM Dl 250-08/Adjunct to I P 200/08, Density! Weight! Volume Intraconversion — Part 1: Conversions of API gravity at 60°F
API MPMS Chapter 11 •53) Part 2-2009/Adjunct to ASTM Dl 250-08/Adjunct to lP 200/08, Density! Weight! Volume Intraconversion — Part 2: Conversions for Relative Density (60/60°F)
API MPMS Chapter 1 1.5) Part 3-2009/Adjunct to ASTM D1250-08/Adjunct to IP 200/08, Density/ Weight! Volume Intraconversion — Part 3: Conversions for Absolute Density at 15° C
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http/Jwwwiso.org/obp
4 Sources and usage guidelines for volume correction factors
4.1 Source of volume correction factors
For the purpose of custody transfer in accordance with this document, reference shall be made to API MPMS Chapter 11.1-2004/Adjunct to ASTM D1250-04 and IP 200/04, including Addendum 1-2007.
API MPMS Chapter 11.1-2004/Adjunct to ASTM D1250-04 and IP 200/04, including Addendum 1-2007,recognizes three distinct commodity groups: crude oil, refined products, and lubricating oils. A special application category is also included which provides volume correction based on the input of an experimentally derived coefficient of thermal expansion.
NOTE I Additional API volume correction factor standards have subsequently been published or are under development for particular applications. See AnnexD.
API MPMS Chapter 11.1-2004/Adjunct to ASTM D1250-04 and IP 200/04 provides general procedures for the conversion of input data to generate the corrected values at the user specified base temperature and pressure using the effect of temperature on the liquid (CTL). the compressibility coefficient (F1,), the correction for the effect of pressure on the liquid (CPL), or the correction for temperature and pressure of a liquid (CTPL). in a form that is consistent with the computation procedures used to generate VCF values. Two sets of procedures are given for computing the volume correction factor: one set for data expressed in U.S. customary units (temperature in degrees Fahrenheit. pressure in pounds per square inch gauge). the other for the metric system of units (temperature in degrees Celsius. pressure in kilopascals). In contrast to API MPMS Chapter 11.1-1980/ASTM D1250-80/IP 200/80, the metric procedures require the procedure for U.S. customary units be used first to compute density at 60 °F. This value is then further corrected to give the metric output.
For density/weight/volume intraconversion, reference shall be made to API MPMS Chapter 11.5 Part 1 to Part 3/Adjunct to ASTM D1250-08 and IP 200/08. These standards provide conversion of measurements from one system of units to another for both in vacuo and in air values.
For NGL and LPG. reference shall be made to API MPMS Chapter 1 1.2.4-2007/GPA Technical Publication TP-27-2007. The implementation procedures describe how to calculate the CTL given an appropriate density factor at basis temperature and an observed temperature, and calculate the appropriate density factor at basis temperature given a relative density at an observed temperature. The implementation procedures are presented in pairs by base temperature. First, the procedures for Tables 23E and 24E of API MPMS Chapter 1 1.2.4-2007/GPA TP-27-2007 at a 60 °F base temperature are given. The procedure for Table 23E makes use of the procedure described in Table 24E, thus Table 24E is presented first. These are followed by procedures for Table 54E and Table 53E at a base temperature of 15 °C, which themselves make use of the procedures in Table 23E and Table 24E; these in turn are followed by the procedures for Table 60E and Table 59E at a base temperature of 20 °C, which also make use of the procedures described in Table 23E and Table 24E.
To correct NGL and LPG volumes metered under pressure to the corresponding volumes under equilibrium pressure for the process temperature at the meter, reference shall be made to API MPMS Chapter 11.2.2-1986 (including Errata June 1996) or API MPMS Chapter 11 .2.2M-1986 or if outside of the density range of these standards, API MPMS Chapter 11.2.1-1984 or API MPMS Chapter 11.2.1 M-1984.BS ISO 91 pdf download.
BS ISO 91:2017 pdf download
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