GB/T 40704-2021 English PDF

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GB/T 40704-2021: Natural gas - Determination of odorant tetrahydrothiophene - On-line sampling gas chromatography method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40704-2021	159	Add to Cart	3 days	Natural gas - Determination of odorant tetrahydrothiophene - On-line sampling gas chromatography method	Valid

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Basic data

Standard ID: GB/T 40704-2021 (GB/T40704-2021)
Description (Translated English): Natural gas - Determination of odorant tetrahydrothiophene - On-line sampling gas chromatography method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: E24
Word Count Estimation: 8,878
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40704-2021: Natural gas - Determination of odorant tetrahydrothiophene - On-line sampling gas chromatography method

---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 odorant tetrahydrothiophene - On-line sampling gas chromatography method ICS 75.060 CCSE24 National Standards of People's Republic of China Determination of the content of natural gas odorant tetrahydrothiophene On-line sampling gas chromatography Released on 2021-10-11 2022-05-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Principle 1 5 Reagents and materials 1 6 Portable gas chromatograph 2 7 Sampling 2 8 Measurement step 2 9 Calculation 3 10 Precision 4

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 of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Natural Gas Standardization Technical Committee (SAC/TC244). Drafting organizations of this document. China National Petroleum Corporation Southwest Oil and Gas Field Branch Natural Gas Research Institute, Kunlun Energy Co., Ltd. Company, China National Petroleum Corporation Southwest Oil and Gas Field Branch, Chengdu Rundao Testing Technology Co., Ltd., China Testing Technology Research Institute, PetroChina Southwest Oil and Gas Field Gas Branch, Southwest Petroleum University, China National Petroleum Corporation North China Oilfield Company Limited, Sichuan University, Chengdu Ecological Environment Monitoring Center Station in Sichuan Province. The main drafters of this document. Li Xiaohong, Wang Xiaoqin, Shen Lin, Zhou Li, Feng Lide, Wang Weijie, Wang Lu, Pan Yi, Deng Fanfeng, Huang Ling, Cai Li, Zhuo Yong, Wang Weikang, Ge Liang, Pu Changsheng, Chen Zhenghua, Han Jing, Zhang Lichun, Lu Yi, Tan Qing, Su Yingying, Zhao Chunlei. Determination of the content of natural gas odorant tetrahydrothiophene On-line sampling gas chromatography Warning---This document does not involve all safety issues related to its application. Before using this document, the user is responsible for The safety and protection measures of the company, and clarify its limited scope of application.

1 Scope

This document stipulates the principle of online determination of odorant tetrahydrothiophene content in natural gas using thermal conductivity detector-portable gas chromatograph, Reagents and materials, instruments, sampling, determination procedures, calculation methods and precision requirements. This document is applicable to the determination of the content of tetrahydrothiophene in natural gas, and the measurement range is 5mg/m3~200mg/m3.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 8170 Numerical rounding rules and the expression and determination of limit values GB/T 13609 Guidelines for Natural Gas Sampling CJJ/T 148-2010 Technical Regulations for Odorization of Urban Gas

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Portablegaschromatograph The gas chromatograph is small in size and equipped with a built-in carrier gas cylinder, which is easy to carry to the site for testing.

4 Principle

Representative natural gas samples and known content of tetrahydrothiophene gas standard materials, under the same operating conditions, enter the chromatographic column After separation, enter the thermal conductivity detector (TCD) to determine the content of tetrahydrothiophene. The content of tetrahydrothiophene is proportional to the peak height or peak area. By comparing the tetrahydrothiophene peak height or peak area of the standard substance and the natural gas sample, the content of tetrahydrothiophene in the natural gas sample is obtained.

5 Reagents and materials

5.1 Carrier gas Helium, the volume fraction is not less than 99.999%. 5.2 Gas reference materials It is recommended to use tetrahydrothiophene gas standard material with a national standard material certification certificate with a content of about 20mg/m3. ......

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