1、API Manual of Petroleum Measurement Standards Chapter 17.12EI Hydrocarbon Management HM 51Procedures for bulk liquid chemical cargo inspections2nd edition, August 2015Published byENERGY INSTITUTE, LONDONThe Energy Institute is a professional membership body incorporated by Royal Charter 2003Register
2、ed charity number 1097899API MPMS CHAPTER 17.12/EI HM 51 PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS2nd editionAugust 2015ISBN 978 0 85293 737 2API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS3CONTENTSPageSpecial notes and disclaimers 6Foreword 81 Scop
3、e 91.1 General .91.2 Measurement stages .91.3 Quality control.101.4 Summary of data to be reported .102 Normative references 112.1 General 112.2 API/EI documents.112.3 EI documents112.4 API documents 112.5 API/ASTM documents .122.6 American Society for Testing and Materials (ASTM) .122.7 Other docum
4、ents 123 Terms and definitions 133.1 Accuracy .133.2 Ballast .133.3 Capacity table, tank.133.4 Critical zone 133.5 Density 133.6 Density, relative 133.7 Dip .143.8 Displacer (tank gauging) .143.9 Floating cover .143.10 Floating roof tank 143.11 Gauging .143.12 Inert gas .143.13 Inhibitors.143.14 Lis
5、t .143.15 Mass 153.16 Measurement .153.17 Meter factor 153.18 On board quantity (OBQ).153.19 Outturn153.20 Reference gauge height153.21 Representative sample.153.22 Restricted gauging153.23 Sampling.163.24 Slops 163.25 Spot sample 163.26 Stripping .163.27 Tape 163.28 Trim.163.29 Trim correction 16AP
6、I MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS4Contents continued Page3.30 Ullage .163.31 Ullage gauge173.32 Vapour 173.33 Vessel experience factor (VEF, VEFL, VEFD) 173.34 Volume correction factor (VCF) 173.35 Volume, gross observed (GOV) 173.36 Volume, gross s
7、tandard (GSV) .173.37 Volume, net standard (NSV).173.38 Volume, total calculated (TCV).173.39 Water, free .183.40 Water cut (static measurement) 183.41 Wedge formula 184 General principles 194.1 The purpose of a cargo inspection194.2 General responsibilities 194.2.1 Communications, capabilities and
8、performance 194.2.2 Equipment 204.2.3 Letters of protest/notices of apparent discrepancy 204.2.4 Reporting.214.3 Potential measurement error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Safety recommendations 225.1 General 225.2 Safety aspects of equipment
9、225.3 Safety at sampling points.235.4 Static electricity 235.5 Health hazards 245.6 Entry into confined spaces245.7 Personnel transfer offshore .256 Operation planning (loading and discharge) 276.1 Key meeting 276.2 Information to be determined before an operation commences277 Inspection, sampling a
10、nd quality control procedures 307.1 Load procedures .307.1.1 Shore tanks .307.1.2 Dynamic measurement (metering) See Annex B.327.1.3 Sampling .337.1.4 Manual sampling of shore tanks347.1.5 Automatic sampling .347.1.6 Pipelines357.1.7 Vessel procedures before loading .367.1.8 Vessel procedures at sta
11、rt of loading 407.1.9 Vessel procedures after loading 417.1.10 Calculations .427.1.11 Vessel experience factor 427.1.12 Reconciliation of measured qualities.42API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS5Contents continued Page7.2 Discharge procedures 427.2.
12、1 Vessel measurements before discharge.427.2.2 In-transit difference .437.2.3 Sampling .437.2.4 Tank stripping operations/ROB .437.2.5 Shore tank gauging and sampling 447.2.6 Reconciliation of measured quantities448 Calculation of quantities 458.1 General 458.2 Calculation methods 458.3 Examples of
13、shore tank and marine tank calculations468.3.1 Weight calculations .469 Final report 479.1 Inspection data 47AnnexesAnnex A Guidelines for verifying the accuracy of manual gauging equipment 49A.1 Introduction .49A.2 Liquid-in-glass thermometers 49A.2.1 Laboratory inspection 49A.2.2 Field inspection.
14、49A.3 Portable electronic gauging devices (PEGDs) 49A.4 Manual gauging tapes .49A.5 Density determination .50A.5.1 Hydrometers .50A.5.2 Densitometers50Annex B Monitoring metering system performance at loading 51B.1 Introduction .51B.2 Description of meter loading measurement systems .51B.2.1 Meter f
15、actor .51B.3 Monitoring procedures.53Annex C Wedge formula calculation 55C.1 Calculation of the trim factor 55C.2 Calculation of the length of the wedge 55C.3 Calculation of DA.56C.4 Wedge formula based on the tank width .57C.5 Wedge formula based on theoretical tank width .58Annex D Offshore operat
16、ions 58D.1 General 60D.2 Safety Personnel transfers .60D.3 Inspection 60D.4 Reconciliation of figures 60D.5 Reporting and final report 61Annex E Wall wash guidelines 62API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS6SPECIAL NOTES AND DISCLAIMERSAPI and EI publi
17、cations are recommended for general adoption but should be read and interpreted in conjunction with Weights and Measures, Safety, Customs and Excise and other regulations in force in the country in which they are to be applied With respect to particular circumstances, local, state, and federal laws
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29、y risks and precautions, nor undertaking their obligations to comply with authorities having jurisdiction.API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS7The above disclaimer is not intended to restrict or exclude liability for death or personal injury caused b
30、y own negligence.The Energy Institute is a professional membership body incorporated by Royal Charter 2003.Registered charity number 1097899, EnglandCopyright 2015 by API, Washington DC and Energy Institute, London:All rights reserved.No part of this work may be reproduced, stored in a retrieval sys
31、tem, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher.API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS8FOREWORDThis publication was prepared jointly by the American Pe
32、troleum Institute Committee on Petroleum Measurement and the Energy Institute Hydrocarbon Management Committee.The American Petroleum Institute Committee on Petroleum Measurement (COPM) and the Energy Institutes Hydrocarbon Management Committee (HMC) are responsible for the production and maintenanc
33、e of standards and guides covering various aspects of static and dynamic measurement of petroleum. API COPM and EI HMC, their subcommittees and work groups consist of technical specialists representing oil companies, equipment manufacturers, service companies, terminal and ship owners and operators.
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42、rgy Institute, 61 New Cavendish Street, London, W1G 7AR, UK.API MPMS CHAPTER 17.12/EI HM 51: PROCEDURES FOR BULK LIQUID CHEMICAL CARGO INSPECTIONS91 SCOPE1 1 GENERALThis document provides cargo measurement procedures for use primarily by inspectors and specifies procedures directed at minimising car
43、go contamination and losses. In the absence of, or in conjunction with, specific instructions from principal(s), this document should be considered a summary of good practice used within the industry.Where the term measurement is used in a general sense, it should be taken to include all aspects of
44、cargo inspection including (but not limited to) tank inspection, sampling, laboratory analysis and testing and other superintending activities, as required by the inspectors principals.The points at which inspectors are required to make their measurements are described and definitions of the terms u
45、sed throughout this document are provided in section 3. Where possible terms approved by API, EI and ISO/TC28 have been adopted.The document also considers the purpose of a cargo survey and summarises the responsibilities of those involved. These procedures may become contractual if reference to the
46、m is made in either a nomination or acknowledgement.Safety matters and related responsibilities are defined and emphasis is placed on the need for inspectors to be continually conscious that safety requirements take precedence over all other considerations.The document describes the procedures which
47、 inspectors should follow and provides references to analytical test methods and calculations. Reference is made to alternative methods since it is recognised that opinions may vary regarding the use of test methods, and that different methods may be specified by the parties involved.1 2 MEASUREMENT
48、 STAGESWhen a cargo is transported by vessel from one shore terminal to another, measurements are normally made at four locations, as shown in Figure 1 for the purpose of establishing:(a) the quantity of cargo delivered (i.e. to confirm the quantity of cargo shown on the Bill of Lading);(b) the quantity of cargo loaded by the vessel;(c) the quantity of cargo discharged by the vessel;(d) the quantity of cargo received by the receiving terminal, and(e) the
