HOME Cart(0) Quotation About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

GB/T 27894.3-2023 English PDF

US$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 27894.3-2023: Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 3: Precision and bias
Status: Valid

GB/T 27894.3: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 27894.3-2023	English	264	Add to Cart	3 days [Need to translate]	Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 3: Precision and bias	Valid	GB/T 27894.3-2023
GB/T 27894.3-2011	English	594	Add to Cart	3 days [Need to translate]	Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns	Obsolete	GB/T 27894.3-2011

PDF similar to GB/T 27894.3-2023

Standard similar to GB/T 27894.3-2023

GB/T 22724 GB/T 26978 GB/T 20368 GB/T 27894.2 GB/T 27894.1 GB/T 27894.5

Basic data

Standard ID	GB/T 27894.3-2023 (GB/T27894.3-2023)
Description (Translated English)	Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 3: Precision and bias
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	E24
Classification of International Standard	75.060
Word Count Estimation	14,138
Date of Issue	2023-03-17
Date of Implementation	2023-07-01
Older Standard (superseded by this standard)	GB/T 27894.3-2011
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 27894.3-2023: Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 3: Precision and bias

---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.
ICS75:060 CCSE24 National Standards of People's Republic of China GB/T 27894:3-2023/ISO 6974-3:2018 Replace GB/T 27894:3-2011 Determination and Calculation of Natural Gas Composition by Gas Chromatography Related Uncertainties Part 3: Precision and Bias gaschromatography-Part 3: Precision and bias (ISO 6974-3:2018, IDT) Released on 2023-03-17 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface I Introduction III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 symbols 3 5 Principle 3 6 Precision reference value 4 7 Practical applications 4 8 Deviation 5 Appendix A (Informative) Data Evaluation of Proficiency Testing Scheme 6 Reference 9

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: This document is part 3 of GB/T 27894 "Determination of Composition and Calculation of Related Uncertainties of Natural Gas by Gas Chromatography": GB/T 27894 has issued the following parts: --- Part 1: General guidelines and composition calculations; --- Part 2: Uncertainty calculation; --- Part 3: Precision and bias; --- Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6 with two chromatographic columns in the laboratory and on-line measurement system hydrocarbons; --- Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and C6 with three chromatographic columns in the laboratory and on-line process system hydrocarbons; --- Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons with three capillary chromatographic columns: This document replaces GB/T 27894:3-2011 "Determination of Components of Natural Gas by Gas Chromatography under a Certain Uncertainty" Part 3 Part: Determination of Hydrogen, Helium, Oxygen, Nitrogen, Carbon Dioxide and Hydrocarbons up to C8 with Two Packed Columns", compared with GB/T 27894:3-2011, except In addition to structural adjustments and editorial changes, the main technical changes are as follows: a) The scope was changed to "quantitative determination of He, H2, O2, N2, CO2 and C1 to C8 hydrocarbons in natural gas with two packed columns": "Phase chromatography" was changed to "the expected precision of gas chromatography established according to ISO 6974-1" (see Chapter 1,:2011 edition Chapter 1); b) The symbols of repeatability standard deviation and reproducibility standard deviation, etc: have been added (see Chapter 4); c) The requirements for materials and equipment such as argon, helium, air, hydrogen, and working reference gases have been deleted (see the:2011 edition Chapter 4, Chapter 5); d) The principle has been changed, and the analysis method for determining the composition of natural gas by gas chromatography has been changed to the analysis result obtained by gas chromatography Predictable precision (see Chapter 5, Chapter 3 of the:2011 edition); e) The reference value for checking the precision of the normalized analysis results of each component is added, and the step of analyzing the content of natural gas components is deleted (see Chapter 6, Chapter 6 of the:2011 edition); f) Deleted the expression method and test report of the analysis results (see Chapter 7 and Chapter 8 of the:2011 edition); g) Practical applications with increased precision (see Chapter 7); h) The method of calculating the deviation has been added (see Chapter 8): This document is equivalent to ISO 6974-3:2018 "Determination of Composition and Calculation of Uncertainties Related to Natural Gas by Gas Chromatography - Part 3 Subsection: Precision and Bias: The following minimal editorial changes have been made to this document: --- Added important tips; --- ISO /IEC 17025 is deleted from the normative references in Chapter 2; --- Added the note of Chapter 6; --- Added ISO /IEC 17025 in the references: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed and managed by the National Natural Gas Standardization Technical Committee (SAC/TC244): This document was drafted by: PetroChina Southwest Oil and Gas Field Branch Natural Gas Research Institute, PetroChina Gas Transmission Management Office of Southwest Oil and Gas Field Branch of Co:, Ltd:, Sinopec Natural Gas Yuji Pipeline Branch, China Petroleum and Natural Gas Co:, Ltd: Tarim Oilfield Branch, National Pipe Network Group United Pipeline Co:, Ltd: West-East Gas Transmission Branch, Jin Card Intelligence Group Co:, Ltd:, China Institute of Testing Technology Chemical Research Institute, CNOOC Energy Development Co:, Ltd: Engineering Technology Branch Company, Southwest Petroleum University: The main drafters of this document: Zeng Wenping, Wang Weijie, Xu Wenxiao, Tu Zhenquan, Wang Xiaoqin, Chang Honggang, Zhou Li, Luo Qin, Liu Hong, Liu Mingliang, Wang Xiaoqiang, Liu Zhe, Ding Yuanming, Yang Jianming, Tu Mengele, Song Chaofan, Deng Fanfeng, Liu Tongliang, Wang Weikang, Lin Min, Zhao Yulong, Shui Leilei, Hao Yehong: This document was first published in:2011, and this is the first revision:

Introduction

GB/T 27894 provides natural gas analysis methods and methods for calculating component mole fractions and uncertainties, and is intended to be used for measuring H2, He, O2, N2, CO2 and hydrocarbon components and component clusters, where component clusters are the heavy components above C5 that are uniformly measured as C6: The method works Used in a variety of applications, such as determining calibration gas mixtures and natural gas composition, or providing uncertainty for calorific value calculations and other physical parameter calculations data: Currently, ISO 6974:4~ISO 6974:6 analytical method standards are proposed to be integrated into ISO 6974:4, and ISO 6974 is expected to be composed of 4 parts become: Therefore, GB/T 27894 is proposed to consist of four parts: --- Part 1: General guidelines and composition calculations: It is intended to give general guidelines for the analysis of natural gas by gas chromatography, as well as Data processing methods for the determination of fractional mole fractions: --- Part 2: Uncertainty calculation: It is intended to describe the procedure for calculating the uncertainty of the mole fractions of the individual components: --- Part 3: Precision and bias: It is intended to describe the expected precision of a gas chromatographic method established in accordance with ISO 6974-1 to and provide guidance on assessing deviations: --- Part 4: Gas Analysis Guidelines: Designed to provide an overview of the analysis of natural gas and natural gas substitutes with Part 1, Part 2 and When used in conjunction with Part 3, use gas chromatography to analyze samples for guidance on obtaining the best data: Determination and Calculation of Natural Gas Composition by Gas Chromatography Related Uncertainties Part 3: Precision and Bias Important notice --- This document does not point out all possible safety issues, the user is responsible for taking appropriate safety and protection measures, and Guarantee compliance with the conditions stipulated by relevant national laws and regulations:

1 Scope

This document describes the precision expected for gas chromatography established according to ISO 6974-1: When the method described in ISO 6974-1 shall The precision values stated in this document provide the expected range of variation between test results when used in one or more competent laboratories: This document also provides guidance on assessing bias:

2 Normative references

This document has no normative references:

3 Terms and Definitions

The following terms and definitions apply to this document: 3:1 Measurement precision measurementprecision Under specified conditions, the degree of agreement between the indicated value or the measured value obtained by repeated measurement of the same or similar measured object: Note 1: Measurement precision is usually expressed in numerical form by the degree of imprecision, such as standard deviation, variance or coefficient of variation under specified measurement conditions: Note 2: "Prescribed conditions" can be repeatability measurement conditions, period precision measurement conditions or reproducibility measurement conditions (see ISO 5725-1): Note 3: Measurement precision is used to define measurement repeatability, measurement precision during measurement and measurement reproducibility: Note 4: The term "measurement precision" is sometimes used to refer to "measurement accuracy", which is wrong: [Source: JCGM200:2012,2:15] 3:2 measurement error errorofmeasurement The measured quantity minus the reference quantity: Note 1 to entry: The concept of "measurement error" can be used in the following two cases: a) When it comes to the existence of a single reference quantity value, such as calibration with a measurement standard whose measurement uncertainty of the measured value is negligible, or a given conventional quantity value When , the measurement error is known; b) Assuming that the measurand is characterized by a single true value or a set of true values whose range is negligible, the measurement error is unknown: Note 2 to entry: Measurement errors should not be confused with errors or omissions: [Source: JCGM200:2012,2:16] 3:3 The component of measurement error that remains constant or varies in a predictable manner across repeated measurements: Note 1: The reference quantity value of the systematic measurement error is a real quantity value, or the measured value of a measurement standard with negligible measurement uncertainty, or is an agreed value:

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 27894.3-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 27894.3-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 27894.3-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 27894.3-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 27894.3-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 27894.3-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.