GB/T 42864-2023 English PDF

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GB/T 42864-2023: Sampling facilities and sampling performance testing of liquefied natural gas
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Basic data

Standard ID: GB/T 42864-2023 (GB/T42864-2023)
Description (Translated English): Sampling facilities and sampling performance testing of liquefied natural gas
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: E24
Classification of International Standard: 75.060
Word Count Estimation: 26,242
Date of Issue: 2023-08-06
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42864-2023: Sampling facilities and sampling performance testing of liquefied natural gas

---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.
ICS 75.060 CCSE24 National Standards of People's Republic of China Liquefied natural gas sampling facilities and sampling performance inspection Published on 2023-08-06 Implemented on 2023-12-01 State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface III Introduction IV 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Sampling method 3 4.1 General 3 4.2 Direct sampling 4 4.3 Indirect sampling 5 4.4 Selection of sampling method 8 4.5 Sampling timing 8 4.6 Sampling point location 9 5 Technical requirements for sampling facilities 9 5.1 Sampling probe 9 5.2 Carburetor11 5.3 Pressure and flow control loop 12 5.4 Buffer tank 12 5.5 Gas sample storage tank 12 5.6 Gas sample transfer pump 12 5.7 Constant pressure moving piston container 12 5.8 Sampling container 13 5.9 Sampling loop 13 5.10 Controller 13 6 Testing and acceptance of sampling facilities13 6.1 Factory testing and acceptance13 6.2 Applicability test 14 7 reviews 15 7.1 Evaluation time 15 7.2 Evaluation content15 7.3 Evaluation methods 15 7.4 Evaluation results 17 7.5 Others17 Appendix A (Normative) Calculation of heat exchange power of gasifier 18 A.1 Sensible heat of gasification18 A.2 Total heat required to gasify 1kg of LNG18 A.3 Carburetor power 18 Appendix B (Normative) Calculation method for gas sample storage tank volume 19 B.1 Gas sample parameters required for purging19 B.2 Filling cylinder consumption gas sample parameters 19 B.3 Effective volume of gas sample storage tank 19 Reference 20 Figure 1 Schematic diagram of classification of direct and indirect sampling methods 3 Figure 2 Basic components of LNG sampling facility 4 Figure 3 Typical diagram of direct sampling5 Figure 4 Typical diagram of point sampling 6 Figure 5 Typical diagram of continuous cumulative sampling 7 Figure 6 Typical diagram of intermittent cumulative sampling 8 Figure 7 Sampling timing 9 Figure 8 Schematic diagram of sampling probe 10 Figure 9 Sampling probe insertion position in horizontal pipe 10 Figure 10 Schematic diagram of gasifier structure 11 Figure 11 Schematic diagram of constant pressure moving piston container 13 Table 1 Main component performance test (example) 15 Table 2 Sampling operation test (example) 16 Table 3 Maintenance and quality management checklist 17

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and coordinated by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355). This document was drafted by. CNOOC Gas and Power Group Co., Ltd., National Oil and Gas Pipeline Network Group Co., Ltd. LNG Receiving Station Management Branch, PetroChina Natural Gas Sales Branch, Sinopec Yantai Longkou LNG Co., Ltd. Company, CNOOC Petrochemical Engineering Co., Ltd., Natural Gas Research Institute of PetroChina Southwest Oil and Gas Field Branch, Chongqing Sichuan Instrument Analytical Instrument Co., Ltd., Beijing Tanneng Technology Co., Ltd., and Sichuan Provincial Product Quality Supervision, Inspection and Testing Institute. The main drafters of this document. Liu Bing, Zhang Chao, Xing Nan, Tian Jing, Chen Li, Wu Jianhong, Yu Songtao, Xiong Binfeng, Tong Wenlong, Zhou Chi, Cheng Yongqiang, Chen Haiping, Wang Chengshuo, Zhou Li, Tao Ke, Wu Yu, Zheng Hongxing, Sun Qi.

Introduction

Liquefied natural gas (LNG) is an ultra-low temperature, multi-component mixed light hydrocarbon liquid. It is extremely susceptible to pressure, temperature and environmental conditions during transportation and use. Evaporation occurs in advance due to the influence of components. Compared with gaseous natural gas sampling, the determination of LNG’s composition, calorific value, density, water dew point and other quality indicators Accuracy depends heavily on the performance of the LNG sampling facility. Among them, the extraction and gasification of LNG, the collection of gasified natural gas samples, Packaging and the control of the entire process are key links. In addition to the mature LNG sampling facilities used in LNG receiving terminals, natural gas liquefaction plants, LNG bunkering ships (stations), gasification satellite stations, LNG tanks, floating liquefied natural gas (FLNG), floating regasification units (FSRU) and other links also need to be LNG components are transferred for metering or quality monitoring. This document provides LNG sampling methods for each link in the LNG industry chain, and proposes the design, testing, acceptance and use of LNG sampling facilities. The purpose of the evaluation requirements is to improve the representativeness of LNG sampling and the stability of LNG sampling facilities, and to ensure the handover measurement and quality supervision of LNG. The control was successfully completed. This document does not address all safety issues related to its application. Before using this document, the user is responsible for formulating appropriate safety and protective measures and clarify their limited scope of application. Liquefied natural gas sampling facilities and sampling performance inspection

1 Scope

This document specifies the sampling methods, technical requirements for sampling facilities, testing and acceptance, and performance evaluation of liquefied natural gas (LNG) Require. This document applies to LNG receiving stations, natural gas liquefaction plants, LNG bunkering ships (stations), gasification satellite stations, LNG tanks, etc. Handover measurement and quality control during delivery.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 13609-2017 Natural Gas Sampling Guidelines GB/T 20603-2006 Continuous sampling method for refrigerated light hydrocarbon fluid liquefied natural gas GB/T 24925 Technical conditions for cryogenic valves GB/T 30490 Natural gas automatic sampling method NB/T 47013.2 Non-destructive testing of pressure equipment Part 2.Radiographic testing

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Liquefied natural gas; LNG An inert gas consisting primarily of methane and may contain small amounts of ethane, propane, butane, nitrogen, or gaseous components commonly found in natural gas. Colored liquid fluid. 3.2 direct samplingdirectsampling Sampling where the sampling medium is directly connected to the analysis unit. Note. Generally used for online analysis. 3.3 indirect sampling indirectsampling Sampling without a direct connection between the sampling medium and the analysis unit. Note. Generally used for offline analysis. 3.4 continuous sampling continuous sampling During the entire sampling time of stable LNG transportation, samples are continuously taken out from the LNG transportation pipeline and vaporized. After the gas sample is processed, it continuously enters the gas sample storage tank at a constant flow rate. After the sampling is completed, the gas sample storage tank is input into the gas sampling container. method. ......

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