1、Manual of PetroleumMeasurement StandardsChapter 11Physical Properties DataSection 2, Part 4Temperature Correction for the Volume of NGL and LPGTables 23E, 24E, 53E, 54E, 59E, and 60EASTM Technical Publication Stock No. PETROLTBL-TP27GPA Technical Publication TP-27FIRST EDITION, SEPTEMBER 2007Manual
2、of PetroleumMeasurement StandardsChapter 11Physical Properties DataSection 2, Part 4Temperature Correction for the Volumeof NGL and LPGTables 23E, 24E, 53E, 54E, 59E, and 60EASTM Technical Publication Stock No. PETROLTBL-TP27GPA Technical Publication TP-27Measurement CoordinationFIRST EDITION, SEPTE
3、MBER 2007Prepared forAmerican Petroleum Institute1220 L Street, NWWashington, D.C. 20005ASTM International 100 Barr Harbor DriveWest Conshohocken, PA 19428Gas Processors Association6526 E. 60th StreetTulsa, OK 74145ii Foreword For custody transfer purposes, natural gas liquid (NGL) and liquefied pet
4、roleum gas (LPG) volumes are generally stated at a fixed base temperature and saturation pressure. As most volume transfers occur at temperatures and pressures other than standard conditions, these volumes are adjusted to standard conditions through the use of correction factors. This document prese
5、nts a new method to calculate temperature correction factors. With the publication of this document, previous API, ASTM and GPA documents containing NGL and LPG temperature correction factors should no longer be used. The document is specifically titled as being suitable for NGL and LPG liquids. Lig
6、ht hydrocarbon mixtures containing significant quantities of methane, carbon dioxide and nitrogen which have density ranges which overlap those contained in these tables can be encountered. However, the two-fluid correlation which is the basis of these tables was not calibrated for such mixtures. Th
7、e actual Standard represented by this report consists of the explicit implementation procedures. Sample tables and other examples created from a computerized version of these implementation procedures are presented within. However, these are for examples only and do not represent the Standard. Nothi
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16、 This publication is an updated version of TP-25. Previous editions of this publication were numbered TP-25. Users of this standard should take efforts to ensure they are using the most current version of this publication. Every effort has been made by the Institute to assure the accuracy and reliab
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21、 electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Copyright 2007 American Petroleum Institute, Gas Processors Association iv ASTM Note This publication does not purport to address all of the safety concerns, if any, associated with i
22、ts use. It is the responsibility of the user of this publication to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. v GPA Disclaimer Neither the GPA nor any person acting on behalf of the GPA makes any warranty, guarantee, or
23、representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this report. The GPA hereby expressly disclaims any liability or responsibility for loss or damage resulting from the use of any apparatus, method, or process disclosed in th
24、is report; and for the infringement of any patent or the violation of any federal, state, or municipal law or regulation arising from the use of, any information, apparatus, method, or process disclosed in this report. All rights reserved. No part of this work may be reproduced, stored in a retrieva
25、l system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Copyright 2007 American Petroleum Institute, Gas Processors Association vi Table of Contents Foreword. ii API Special Notes iii ASTM Note iv GPA
26、Disclaimer.v Table of Contents. vi Nomenclature. viii 1 Introduction1 2 Scope2 3 Significant Digits .4 4 Comparison to the Previous Standard4 5 Implementation Procedures .9 5.1 CTL (Table 24) and Relative Density (Table 23) for NGL and LPG using a 60F Base Temperature .9 5.1.1 Implementation Procedu
27、re for Table 24E (60F Basis).9 5.1.1.1 Inputs and Outputs 9 5.1.1.2 Outline of Calculations . 9 5.1.1.3 T24 Implementation Procedure. 10 5.1.1.4 Examples for Section 5.1.1 (Table 24E). 15 5.1.2 Implementation Procedure for Table 23E (60F Basis) 33 5.1.2.1 Inputs and Outputs 33 5.1.2.2 Outline of Cal
28、culations . 33 5.1.2.3 T23 Implementation Procedure. 34 5.1.2.4 Examples for Section 5.1.2 (Table 23E). 42 5.2 CTL (Table 54) and Density (Table 53) for NGL and LPG using a 15C Base Temperature .61 5.2.1 Implementation Procedure for Table 54E (15C Basis) . 61 5.2.1.1 Inputs and Outputs 61 5.2.1.2 Ou
29、tline of Calculations . 61 5.2.1.3 T54 Implementation Procedure. 61 5.2.1.4 Examples for Section 5.2.2 (Table 54E). 65 5.2.2 Implementation Procedure for Table 53E (15C Basis) . 83 5.2.2.1 Inputs and Outputs 83 5.2.2.2 Outline of Calculations . 83 5.2.2.3 T53 Implementation Procedure. 83 5.2.2.4 Exa
30、mples for Section 5.2.2 (Table 53E). 85 vii 5.3 CTL (Table 60) and Density (Table 59) for NGL and LPG using a 20C Base Temperature 101 5.3.1 Implementation Procedure for Table 60E (20C Basis) . 101 5.3.1.1 Inputs and Outputs 101 5.3.1.2 Outline of Calculations . 101 5.3.1.3 T60 Implementation Proced
31、ure. 101 5.3.1.4 Examples for Section 5.3.1 (Table 60) . 105 5.3.2 Implementation Procedure for Table 59E (20C Basis) . 123 5.3.2.1 Inputs and Outputs 123 5.3.2.2 Outline of Calculations . 123 5.3.2.3 T59 Implementation Procedure. 123 5.3.2.4 Examples for Section 5.3.2 (Table 59E). 126 6 Sample Sect
32、ions of Printed Tables 142 7 References149 viii Nomenclature A, B, C parameters in Section 5.1.2 quadratic equation CTLtemperature correction factor h2scaling factor k1,k2,k3,k4parameters in saturation density equation TB base temperature (60F, 15C, or 20C) TBK base temperature (288.15 K, or 293.15
33、K) Tcfluid critical temperature (K) Tc,ref reference fluid critical temperature (K) TFobserved measurement temperature (F or C) Tr,xreduced observed temperature Txobserved temperature (K) V60/VTxratio of volume at 60F to volume at temperature Tx. Is the basic definition of CTLX interpolating factor
34、Zccritical compressibility factor , , parameters in Section 5.1.2 quadratic equation interpolation variable parameter in saturation density equation xrelative density at observed temperature x,highrelative density at the observed temperature corresponding to the upper bound for the 60 relative densi
35、ty x,lowrelative density at the observed temperature corresponding to the lower bound for the 60 relative density x,midrelative density at the observed temperature corresponding to the intermediate 60 relative density used in Section 5.1.2 iteration procedure x,trialtrial relative density at the obs
36、erved temperature used in Section 5.1.2 iteration procedure relative density at the base temperature, TB 60 relative density at a base temperature of 60F Tx relative density at the observed temperature, Tx60,highupper bound for the observed fluids 60 relative density 60,lowlower bound for the observ
37、ed fluids 60 relative density 60,midintermediate 60F relative density value used in Section 5.1.2 iteration procedure 60,trialtrial 60F relative density value used in Section 5.1.2 iteration procedure ccritical molar density (gram-mole/L) 60density at a base temperature of 60F (kg/m3) 15 density at
38、a base temperature of 15C (kg/m3) 20 density at a base temperature of 20C (kg/m3) sat saturation molar density (gram-mole/L) sat60 saturation molar density at 60F (gram-mole/L) satT saturation molar density at observed temperature (gram-mole/L) 1Temperature Correction for the Volume of NGL and LPG T
39、ables 23E, 24E, 53E, 54E, 59E, and 60E 0 Implementation Guidelines This Revised Standard/Technical Publication is effective upon the date of publication and supersedes the ASTM-IP 1952 Petroleum Measurement Tables, GPA 2142, GPA TP-16, Tables 33 and 34 of API MPMS Chapter 11.1-1980 Volumes XI/XI (Ad
40、juncts to ASTM D1250-80 and IP 200/80), API MPMS Chapter 11.2.2/11.2.2M, and API/ASTM/GPA TP-25. However, due to the nature of the changes in this Revised Standard/Technical Publication and the fact that it is or may be incorporated by reference in various regulations, it is recognized that guidance
41、 concerning an implementation period may be needed in order to avoid disruptions within the industry and ensure proper application. As a result, it is recommended that this Revised Standard/Technical Publication be utilized on all new and existing applications no later than TWO YEARS after the publi
42、cation date. An application, for this purpose, is defined as the point where the calculation is applied. Once the Revised Standard/Technical Publication is implemented in a particular application, the Previous Standard/Technical Publication will no longer be used in that application. However, the us
43、e of API standards and ASTM and GPA technical publications remains voluntary, and the decision on when to utilize a standard/technical publication is an issue that is subject to the negotiations between the parties involved in the transaction. 1 Introduction For custody transfer purposes, natural ga
44、s liquid (NGL) and liquefied petroleum gas (LPG) volumes are generally stated at a fixed base temperature and saturation pressure. As most volume transfers occur at temperatures and pressures other than standard conditions, these volumes are adjusted to standard conditions through the use of correct
45、ion factors. Separate factors for temperature (CTL) and pressure (CPL) are used to make these corrections. This document presents a new method to calculate temperature correction factors. Pressure correction factors are not within the scope of this document, but can be calculated using American Petr
46、oleum Institute Manual of Petroleum Measurement Standards (MPMS) Chapter 11.1-20041(which superseded Chapter 11.2.1-19842and 11.2.1M-19843), Chapter 11.2.2-1986/GPA 8286-864or Chapter 11.2.2M-1986/GPA 8286-865, depending on product type. Previously, most NGL and LPG temperature correction factors ha
47、ve been obtained from a variety of sources: ASTM-IP “Petroleum Measurement Tables”6, published in 1952. This publication is limited to a 60F relative density range of 0.500 and higher. 2 TEMPERATURE CORRECTION FOR THE VOLUME OF NGL AND LPG TABLES 23E, 24E, 53E, 54E, 59E, AND 60E GPA Standard 2142, “
48、Standard Factors for Volume Correction and Specific Gravity Conversion of Liquefied Petroleum Gases”7, published in 1957, also contains the same correction factors as the 1982 ASTM-IP document. GPA TP-16 “Composite Pressure and Temperature Volume Correction Factor Tables for Liquefied Petroleum Gas
49、(LPG) and Natural Gasoline”8, published in 1988. It is limited to the following products: HD-5 Propane with a relative densities of 0.501, 0.505, and 0.510; iso-butane at a relative density of 0.565; normal butane at a relative density of 0.585; and natural gasoline (12-14 psia RVP) at a relative density of 0.664. API MPMS Chapter 11.1-1980/ASTM D1250-80 Volume XII, Table 33 “Specific Gravity Reduction to 60F For Liquefied Petroleum Gases and Natural Gasoline”9. API MPMS Chapter 11.1-1980/AS
