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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 27894.1-2020: Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition Status: Valid GB/T 27894.1: Historical versions
Basic dataStandard ID: GB/T 27894.1-2020 (GB/T27894.1-2020)Description (Translated English): Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: E24 Classification of International Standard: 75.060 Word Count Estimation: 38,326 Date of Issue: 2020-09-29 Date of Implementation: 2021-04-01 Older Standard (superseded by this standard): GB/T 27894.1-2011 Regulation (derived from): National Standard Announcement No. 20 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 27894.1-2020: Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1.General guidelines and calculation of composition ICS 75.060 E24 National Standards of People's Republic of China Replace GB/T 27894.1-2011 Determination of composition and calculation of natural gas by gas chromatography Related uncertainty Part 1.General guidelines and composition calculation (ISO 6974-1.2012, IDT) 2020-09-29 released Implementation on 2021-04-01 State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsForeword Ⅰ Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbol 4 5 Principles of Analysis 5 6 Analysis process 6 7 Control Chart 17 8 Test report 17 Appendix A (informative appendix) ISO 6974-3..2000~ISO 6974-6 analysis method application range and chromatographic conditions comparison 18 Appendix B (informative appendix) Bridging components and normalization methods 20 Appendix C (informative appendix) Methane subtraction method 25 Appendix D (Normative Appendix) Relative Response Factor 26 Appendix E (Informative Appendix) Judgment of Outliers 28 Appendix F (Normative Appendix) Pressure Correction in Calibration and Sample Analysis 29 Appendix G (informative appendix) Applicable software for generalized least squares regression analysis 30 Appendix H (Informative Appendix) Use of Control Chart 32 Reference 33ForewordGB/T 27894 "Determination of Composition and Calculation of Uncertainty Related to Natural Gas by Gas Chromatography" is divided into 6 parts. ---Determination of composition and calculation uncertainty of natural gas by gas chromatography. Part 1.General guidelines and composition calculation; ---Determination of composition of natural gas by gas chromatography and calculation of uncertainty. Part 2.Calculation of uncertainty; ---The composition of natural gas is determined by gas chromatography under a certain degree of uncertainty. Part 3.Determination of hydrogen, helium, oxygen, and oxygen with two packed columns Nitrogen, carbon dioxide and hydrocarbons up to C8; ---Determination of composition of natural gas by gas chromatography under certain uncertainty. Part 4.Used in laboratory and online measurement system Two chromatographic columns determine nitrogen, carbon dioxide and C1 to C5 and C6 hydrocarbons; ---Determination of composition of natural gas by gas chromatography under certain uncertainty. Part 5.Used in laboratory and online process system Three chromatographic columns determine nitrogen, carbon dioxide and C1 to C5 and C6 hydrocarbons; ---Determination of composition of natural gas by gas chromatography under a certain degree of uncertainty. Part 6.Determination of hydrogen, gas with three capillary columns Helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons. This part is Part 1 of GB/T 27894. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 27894.1-2011 "Determination of composition of natural gas by gas chromatography under certain uncertainty, Part 1 Points. Analysis Guidelines. Compared with GB/T 27894.1-2011, the main technical changes in this part are as follows. ---Modified the standard name; ---Modified the scope (see Chapter 1, Chapter 1 of the.2011 edition); ---Modified the normative references (see Chapter 2, Chapter 2 of the.2011 edition); ---Added the definition of terms (see Chapter 3, Chapter 3 of the.2011 edition); ---Modified symbols and subscripts (see Chapter 4, Chapter 4 of the.2011 edition); ---Modified the analysis principle part (see Chapter 5, Chapter 5 of the.2011 edition); --- Deleted the chapters on materials, instruments, characteristic requirements, and sampling (see Chapters 6, 7, 8, 9 of the.2011 edition); ---Modified the analysis steps (see Chapter 6, Chapter 10 of the.2011 edition); ---Modified the characteristic comparison of typical analysis methods (see Appendix A, Appendix A of the.2011 edition); ---Modified the use of control charts (see Appendix H, Appendix B of the.2011 edition); ---Added the introduction of bridging components and normalization methods (see Appendix B); ---Added methane subtraction method (see Appendix C); ---Added the relative response factor data of FID and TCD (see Appendix D); ---Added the judgment of outliers (see Appendix E); ---Added pressure correction in calibration and sample analysis (see Appendix F); ---Introduction to the applicable software for generalized least squares regression analysis has been added (see Appendix G). The translation method used in this part is equivalent to ISO 6974-1.2012 "Natural Gas Determination of Composition and Calculation by Gas Chromatography Uncertainty Degree Part 1.General Guidelines and Composition Calculation. Chinese documents that have a consistent correspondence with the international documents cited in this section as follows. ---GB/T 10628-2008 Gas analysis calibration gas composition determination and calibration comparison method (ISO 6143.2001, IDT) ---GB/T 27418-2017 Measurement Uncertainty Evaluation and Expression (ISO /IEC Guide 98-3.2008, MOD) ---GB/T 28766-2018 Natural gas analysis system performance evaluation (ISO 10723.2012, IDT) This section has made the following editorial changes. --- Amend "ISO 6974-3" to "ISO 6974-3.2000"; --- Modify "ISO 6974-5" to "ISO 6974-5.2000". This part was proposed and managed by the National Natural Gas Standardization Technical Committee (SAC/TC244). Drafting organizations of this section. China National Petroleum Corporation Southwest Oil and Gas Field Branch Natural Gas Research Institute, Daqing Oilfield Co., Ltd. Ren company, China National Petroleum Corporation Natural Gas Sales Branch, China National Petroleum Corporation North China Oilfield Branch Company, Nanjing Rundao Oil Monitoring Technology Co., Ltd., China National Petroleum Corporation Limited for natural gas quality control and energy measurement Laboratory, oil industry natural gas quality supervision and inspection center. The main drafters of this section. Wang Weijie, Zhou Li, Luo Qin, Zeng Wenping, Chang Honggang, Li Yimei, Tan Weiqun, Han Hui, Cai Li, Wang Xiaoqin, Wang Weiwei, Xu Zhaoming, Sun Qi, Chen Qiongtao, Zhu Xiaoping, Zhang Liping, Luo Zhiwei, Wang Xianzhi. The previous versions of the standards replaced by this part are as follows. ---GB/T 27894.1-2011.IntroductionISO 6974 provides natural gas analysis methods and methods for calculating component mole fractions and uncertainties. ISO 6974 (all parts) It is used to determine H2, He, O2, N2, CO2 and hydrocarbon compounds as a single component or a group of components, such as C5 or more (without C5) All hydrocarbon compounds are defined as C6.This method is suitable for calibrating gas mixture, calorific value of gas and calculation of other physical parameters Provide gas composition data and uncertain data, etc. ISO 6974-3.2000 and subsequent parts detail specific application methods. This part of GB/T 27894 gives general guidelines for the analysis of natural gas by gas chromatography, and the determination of the mole fraction of natural gas components. Determined data processing method. ISO 6974-2 gives the steps to calculate the uncertainty of the mole fraction of each component. ISO 6974-3.2000 and subsequent parts give different gas chromatography analysis methods, including daily laboratory analysis and online process application. Appendix A of this section gives a comparison of ISO 6974-3.2000 and subsequent analysis methods. This part of GB/T 27894 is used in combination with the gas chromatographic analysis method given in ISO 6974-3.2000 and subsequent parts. Calculate the component mole fraction. If you need to calculate the mole fraction and uncertainty, this section also needs to combine ISO 6974-2 and gas chromatography analysis methods. This part of GB/T 27894 gives all the basic steps for establishing an analysis method, including an overview of the analysis structure, determining the scope of work and Establish analysis procedures. Once the scope of work is determined, the following types of components can be evaluated and confirmed. ---The main component or component family that can be analyzed by direct measurement (direct measurement component); ---Use indirect methods such as other reference components in the standard gas mixture to obtain the component or component family (indirect Measurement component); --- The mole fraction can be assumed to be a constant unmeasured component (unmeasured component). This part of GB/T 27894 gives three types of operation methods. single operation, multiple operations using bridging components, and no bridging Multiple operations of components. Among them, multiple operations without bridging components are a special case of a single operation method. 5.5 in this part of GB/T 27894 gives the conventional normalization method for the original mole fraction to obtain the processed mole fraction. for For the multiple operation method without bridging component, the uncertainty result calculated by conventional normalization is conservative. Need to be more accurate For qualitative evaluation, the generalized least squares method (GLS) can be used instead of the normalization method. This method is given in Appendix B. When it needs to be combined with ISO 6974-2 Used when calculating uncertainty. In addition, there are other methods to calculate the processed mole fraction, such as methane subtraction method (refer to Appendix C), number According to the coordination law [1]. Determination of composition and calculation of natural gas by gas chromatography Related uncertainty Part 1.General guidelines and composition calculation1 ScopeThis part of GB/T 27894 gives the method for calculating the mole fraction of natural gas components, and specifies the processing when determining the mole fraction of components The data requirements are applicable to single operation and multiple operation methods, as well as multi-point calibration method or single point used after the performance evaluation of the analyzer Correction method. This section gives the raw data and processed data (such as normalization processing) of all component mole fractions and their associated uncertainties The processing process is suitable for processing data obtained from repeated analysis or single analysis of natural gas samples.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO /IEC Guide 98-3 Measurement Uncertainty Part 3.The Expression Method of Measurement Uncertainty (GUM.1995) [Uncer- taintyofmeasurement-Part 3.Guidetotheexpressionofuncertaintyin measurement(GUM. 1995)] ISO 6143 Gas analysis-Comparison methods (Gasanalysis-Comparison methods) fordeterminingandcheckingthecompositionofcalibrationgasmixtures) ISO 10723 Natural gas analysis system performance evaluation (Naturalgas-Performance evaluationforanalyticalsys- tems)3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Response The output signal of a certain component of the measuring system is expressed in the form of peak area or peak height. 3.2 Reference component The component of the certified standard gas mixture (CRM) as the reference material (refer to 3.10), used to calibrate the The response value of other similar components in the sample. Note. For example, CRM contains hydrocarbons up to n-butane, but does not contain pentane or higher components, then n-butane in CRM can be used as pentane or heavier in the sample The quantitative reference component of the component. The reference component usually has a first-order response function with zero intercept, that is, a straight line passing through the origin. 3.3 Relative response factor The molar response ratio of the sample component j and the reference component through the same detector. ...... |
