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GB/T 22634-2008 English PDF

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GB/T 22634-2008: Conversion between water content and water dew point of natural gas
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Basic data

Standard ID GB/T 22634-2008 (GB/T22634-2008)
Description (Translated English) Conversion between water content and water dew point of natural gas
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E24
Classification of International Standard 75.060
Word Count Estimation 24,29
Date of Issue 2008-12-29
Date of Implementation 2009-05-01
Adopted Standard ISO 18453-2004, MOD
Regulation (derived from) National Standard Approval Announcement 2008 No.21 (Total No.134)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies when the water content of natural gas or water dew point between the two which is known as a reliable mathematical relationship, and gives relational uncertainty, but does not quantify the measurement uncertainty requirements. Calculation of the standard. Both for the calculation of the water content, but also to calculate the dew point of water. Unless otherwise stated, the volume of the standard adopted this standard reference conditions: pressure of 101. 325 kPa, the temperature is 20��C.

GB/T 22634-2008: Conversion between water content and water dew point of natural gas

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Conversion between water content and water dew point of natural gas ICS 75.060 E24 National Standards of People's Republic of China In terms of the water content and water dew point of natural gas between (ISO 18453.2004Naturalgas-Correlationbetween watercontentandwaterdewpoint, MOD) Posted 2008-12-29 2009-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ Introduction Ⅱ 1 Scope 1 2 symbols, units, terminology and definitions 3 Relational Development 2 4 Applications and uncertainty associated with type 2 5 relationship 3 Appendix A (informative) Calculation Example 7 Annex B (informative) traceability of 9 Annex C (normative) thermodynamics 10 Annex D (informative) Conversion Unit 15 Under Appendix E (Informative Appendix) Bukacek gas equilibrium water content correlation 16 Annex F (informative) This standard and ISO 18453.2004 technical differences and their causes Table 18

Foreword

This revised standard adopts ISO 18453 "associated gas --- water content and water dew point between" (2004, in English), also refer to ASTMD1142 "Standard Test Method obtained by measuring the dew point of water vapor content" (1995 in English) and IGT Research Report 8 "Days Natural gas equilibrium water content "(1995, in English) from the text. This standard is based on ISO 18453.2004 redrafted. Taking into account the special needs of our regulatory requirements and industry standards at the time of the adoption of international standards has been modified. For ease of use, this standard Associate in editorial, technical, text structure has been modified. About the technical differences have been incorporated into the text and in terms of which they are involved Margin identified by a single vertical line. We give a list of these technical differences and their causes in Appendix F for reference. This standard and ISO 18453.2004 The main differences are as follows. --- Writing rules according to GB/T 1.1-2000 "Standardization Guide Part 1. Structure and standard writing rules" Writing; --- Chapter 1 Scope, based on ISO 18453, Chapter 1, the increase in the standard reference conditions specified; --- Chapter 2 symbols and definitions, symbols are the ISO 18453.2004 Appendix D subscript, symbols and units of content to this chapter, and According to GB/T 1.1-2000 make the necessary changes, using the definition of ISO 18453.2004 Content Chapter 2, delete the "normal parameter Than conditions "and" traceability "is defined; --- Appendix D, the contents of the ISO 18453 Appendix D Symbols and Definitions moved to Chapter 2, remove the rest of the abbreviated content, and Unit conversion for relevant content to improve and refine; --- Appendix E, Reference ASTMD1142. 6.3 and IGT in 1995 research report prepared by the content of 8; --- Some of the statements apply to international standards to apply to our standard formulation; --- Delete ISO 18453.2004 Foreword by modifying the ISO 18453.2004 introduction. Appendix C of this standard is a normative appendix, Appendix A, Appendix B, Appendix D, Appendix E, Appendix F are informative appendices. This standard by the National Standardization Technical Committee proposed natural gas. This standard by the National Standardization Technical Committee on Gas (SAC/TC244) centralized. This standard drafting units. China Southwest Oil & Gas Field Branch, Research Institute of Petroleum, China Petroleum Engineering Co., Ltd. Southwest Company. Participated in the drafting of this standard. US special company Ami Process and Analytical Products. The main drafters. Zhang Yuan, Luo Qin, Yang Fang, Xuwen Xiao, yellow and, later Yongjie, Tang Meng. Participate drafters of this standard. Li Jianying, Zhang Yana, Bin.

Introduction

ISO 18453.2004 standard provides a reliable mathematical relationship of natural gas in the water content and water dew point between. The Calculation Method GERG1 law is developed for the water content of the water dew point calculation or. Information related with thermodynamic principles given in Appendix C; and Its traceability Information relating to the application and uncertainty are given in Appendix B. Gas Industry some operational problems can be traced to natural gas water content. Even low levels of water vapor in natural gas, Operating conditions of pressure and temperature changes may also cause the hydraulic analysis, leading to corrosion problems The formation of hydrates or ice. To avoid these Problem, gas companies have to install expensive dewatering device. Design and cost of these devices depend on the exact content of the water dew point And understanding (contract) under the water content. Over the past few decades, due to improved moisture measuring instruments which led to the development of the instrument measured water content focused on, rather than focus on water dew point. Therefore, if the measurement of water content, it needs water dew expression correlations. GERG recognized before confirming the conventional correlation between water content and water dew point, we need a large number of representative within the attention range The water content and water dew point of natural gas corresponding to establish a comprehensive and accurate database. It proved that the uncertainty range of the existing correlation can be improved. Therefore, a more accurate correlation depends on the composition of successfully developed on the basis of this new database on. ISO 18453.2004 standard is developed by the GERG with representative of the custody transfer of natural gas in the water content and water dew Relations between points (or vice versa) the calculation process standardization. In order to make the standard more practical, realistic China's natural gas industry, reference ASTMD1142. 6.3 in 1995, and IGT RESEARCH Study report content 8 (1995), an increase of Appendix E "under Bukacek equilibrium gas water content correlation." 1 GERG is "European Gas Research Organization GroupeEuropéendeRechercheGazière" acronym. In terms of the water content and water dew point of natural gas between

1 Scope

This standard establishes when the water content of the natural gas or water dew point which is known between a reliable mathematical relationship; and Given the correlation of uncertainty, but uncertainty of measurement without quantization rules. Calculation of this standard, both for calculating water content, but also for water dew point calculation. Unless otherwise specified, the standard volume used in this standard reference conditions. pressure 101.325kPa, a temperature of 20 ℃. 2 symbols, units, terminology and definitions 2.1 Symbols and units Symbols and units used in this standard are shown in Table 1. Table 1 Symbols and units Dimensionless unit Symbol Meaning Symbol Chou volume compensation parameter L3m-1 m3/kmol X (y) the mole fraction of 1 R the gas constant (0.008314510) ML2T-2 m-1θ-1 MJ/kmolK T thermodynamic (absolute) temperature θ K Vp volume L3 m3 Vp m molar volume L3m-1 m3/kmol The water content βw concentration represented by ML-3 mg/m3 ω eccentric factor and related substances 1 K and material related to constant 1 Subscript c indicates a critical point Subscript R represents Comparative Condition Subscript v indicates Gas Subscript w represents water Note. In the "Dimension" column, length, mass, time, Moore and dimensionless thermodynamic temperature, respectively L, M, T, m and θ represent. 2.2 Terms and Definitions The following terms and definitions apply to this standard. 2.2.1 Relationship distributed random variables in two or more random variables between two or more.

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