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GB/T 24964-2019 English PDF

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GB/T 24964-2019: Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers
Status: Valid

GB/T 24964: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 24964-2019English1104 Add to Cart 4 days [Need to translate] Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers Valid GB/T 24964-2019
GB/T 24964-2010English519 Add to Cart 3 days [Need to translate] Refrigerated light hydrocarbon fluids -- Liquefied natural gas -- Procedure for custody transfer on board ship Obsolete GB/T 24964-2010

PDF similar to GB/T 24964-2019


Standard similar to GB/T 24964-2019

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Basic data

Standard ID GB/T 24964-2019 (GB/T24964-2019)
Description (Translated English) Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E24
Classification of International Standard 75.060
Word Count Estimation 58,512
Date of Issue 2019-06-04
Date of Implementation 2020-01-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 24964-2019: Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers


---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.
Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers ICS 75.060 E24 National Standards of People's Republic of China Replace GB/T 24964-2010 Frozen light hydrocarbon fluid Cargo volume measurement on LNG carriers (ISO 10976.2015, IDT) 2019-06-04 released 2020-01-01 Implementation State Administration for Market Regulation Issued by China National Standardization Administration

Table of contents

Preface Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms, definitions and abbreviations 1 3.1 Terms and definitions 1 3.2 Abbreviations 4 4 General operational safety measures and regulatory requirements 5 4.1 Summary 5 4.2 Electrical equipment 6 4.3 Electromagnetic interference 6 4.4 Maintenance 6 4.5 Operating conditions 6 4.6 Compatibility 6 4.7 Personal protection 6 4.8 Procedure 6 5 Management system and equipment 6 5.1 Summary 6 5.2 Performance of measuring equipment 7 5.3 Calibration and certification of measuring equipment 7 5.4 Verification of measuring equipment during dry dock maintenance 8 5.5 Inspection of measuring equipment during transfer 8 5.6 Static measurement systems and equipment 8 5.7 Dynamic measurement systems and devices 15 6 Measurement procedure 16 6.1 Summary 16 6.2 Static measurement 16 6.3 Replacement and pre-cooling capacity 20 6.4 Dynamic measurement 21 7 Cargo volume calculation 21 7.1 Summary 21 7.2 LNG volume determination 21 7.3 Density determination of LNG 21 Appendix A (informative appendix) LNG carrier design and offshore operations 22 Appendix B (informative appendix) LNG shipboard measurement considerations 28 Appendix C (informative appendix) Example of spherical cargo hold capacity representation 32 Appendix D (informative appendix) Calculation example 39 Appendix E (informative appendix) Sampling 47 Appendix F (Informative Appendix) Marine Survey Witness Checklist 50 References 53

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 24964-2010 "Custody Handover Procedures for Frozen Light Hydrocarbon Fluid Liquefied Natural Gas Ships". This standard and Compared with GB/T 24964-2010, the main technical changes are as follows. ---Modified the scope of the standard (see Chapter 1, Chapter 1 of the.2010 edition); ---Modified normative reference documents (see Chapter 2, Chapter 2 of the.2010 edition); --- Deleted terms and definitions "end custody transfer", "custody transfer", "board custody transfer system", "start custody transfer", and "hot calibration" Coefficient" (see 3.2, 3.3, 3.4, 3.5, 3.6 in.2010 edition); --- Added 33 terms and 30 abbreviations (see 3.1, 3.2); ---Added general operational safety measures and regulatory requirements (see Chapter 4); ---Added the performance index requirements, calibration and certification, tank capacity meter, pre-cooling meter, radar level gauge and float liquid of measuring system and equipment The structure principle and use precautions of the level gauge and capacitance level gauge (see Chapter 5); ---Modified the requirements of temperature measurement time (see 6.2.7,.2010 edition 6.3); ---Modified the pressure measurement time requirements (see 6.2.8,.2010 edition 6.4). The translation method used in this standard is equivalent to the ISO 10976.2015 "Measurement of Cargo Volume on Frozen Light Hydrocarbon Fluid Liquefied Natural Gas Carriers" the amount". The Chinese documents that have a consistent correspondence with the international documents cited in this standard are as follows. ---GB/T 10250-2007 Electromagnetic compatibility of ship electrical and electronic equipment (IEC 60533.1999, IDT); ---GB/T 19204-2003 General characteristics of liquefied natural gas (EN1160.1997, IDT); ---GB/T 24959-2019 General requirements for the temperature measurement system in the cargo compartment of a refrigerated light hydrocarbon fluid LNG carrier (ISO 8310.2012, MOD). This standard was proposed and managed by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355). Drafting organizations of this standard. China National Petroleum Corporation Southwest Oil and Gas Field Branch Natural Gas Research Institute, Guangdong Dapeng Liquefied Natural Gas Co., Ltd., CNOOC Fujian Natural Gas Co., Ltd., PetroChina Jingtang LNG Co., Ltd. The main drafters of this standard. Wang Weijie, Luo Qin, Zhou Li, Xu Wenxiao, Chang Honggang, Li Ke, Wang Xiaoqin, Zhou Daibing, Tang Xianming, Wen Qingcheng, Ai Shaoping, Duan Jiqin, Chen Huiyu. The previous versions of the standard replaced by this standard are as follows. ---GB/T 24964-2010.

Introduction

This standard provides recognized cargo volume measurement methods for LNG carriers involved in LNG ship-to-shore trade, including cargo volume measurement, Reporting and recording methods. The purpose of this standard is to establish a unified specification for the measurement of cargo volume on LNG carriers, so as to calculate its energy. Details of this standard Describes the currently commonly used methods for measuring the volume of goods, but does not exclude the use or development of other technologies or methods, or revised versions of these methods. Readers are advised to conduct a detailed review of the latest editions of publications, standards and documents cited in this standard in order to improve the understanding of the methods described. understanding. This standard is not intended to replace other organizations, such as the International Maritime Organization (IMO), International Shipping Union (ICS), and the International Maritime Forum of Petroleum Companies (OCIMF), International Group of LNG Importing Countries (GIIGNL), International Association of Gas Carriers and Terminal Operators (SIGTTO), or Safety or operating regulations recommended by self-employed companies. This standard is not intended to replace any other safety or environmental factors, local regulations or contracts. Special terms. This standard uses the International System of Units as the main measurement unit, because the International Unit is a common unit for the measurement of goods in the industry. but, Since the cargo holds of some LNG carriers are calibrated according to common U.S. units, and some purchase and sale contracts also use U.S. common units, this standard is both International units are given, and equivalent American common units are also provided. All parties involved in the LNG custody transfer agree to use the correct unit Convert and record. Frozen light hydrocarbon fluid Cargo volume measurement on LNG carriers

1 Scope

This standard specifies all the steps required to correctly measure the cargo carried on a liquefied natural gas (LNG) carrier, including liquid volume, gas Measurement of body volume, temperature and pressure, and volume of all cargo on a transport ship. This standard describes commonly used measurement systems on LNG carriers. The purpose of the application of the system is to improve the common sense of all relevant parties and improve the measurement procedure in the LNG measurement process. This standard specifies liquefied natural gas General requirements for ship-to-shore trade.

2 Normative references

The 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 8310 refrigerated hydrocarbon and non-petroleum-based liquefied gas fuel ocean tanker and floating oil storage device automatic measurement thermometer General requirements (Refrigeratedhydrocarbonandnon-petroleumbasedliquefiedgaseousfuels-Generalre- Requirementsforautomatictankthermometersonboardmarinecarriersandfloatingstorage) ISO 8943 Refrigerated light hydrocarbon fluid LNG sampling continuous method and batch method (Refrigerated lighthydrocarbon fluids-Samplingofliquefiednaturalgas-Continuousandintermittentmethods) ISO 18132-1 Frozen Hydrocarbon and Non-Petroleum-based Liquefied Gas Fuel Automatic Tank Level Gauge General Requirements Part 1.Marine Transportation Automatic tank measurement level gauges (Refrigeratedhydrocarbonandnon-petroleum) for liquefied natural gas in ships and floating oil storage devices basedliquefiedgaseousfuels-Generalrequirementsforautomatictankgauges-Part 1.Automatic tankgaugesforliquefiednaturalgasonboardmarinecarriersandfloatingstorage) IEC 60533 Electromagnetic compatibility of electrical and electronic facilities in ships (Electrical and electronic instalations inships- Electromagneticcompatibility) EN1160 General characteristics of equipment and installations for liquefied natural gas (Instalationsandequipmentfor liquefiednaturalgas-Generalcharacteristicsofliquefiednaturalgas) IACS unified requirements E10 (UnifiedRequirementsE10) 3 Terms, definitions and abbreviations 3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Absolutepressure The sum of gauge pressure and ambient atmospheric pressure. 3.1.2 Inflatable aerating Introduce fresh air with acceptable humidity into the cargo hold, purge the inert gas, increase the oxygen volume to about 21%, and ensure its

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