_API_MPMS_5.5-2005_2015.pdf

Manual of PetroleumMeasurement StandardsChapter 5-MeteringSection 5-Fidelity and Security of FlowMeasurement Pulsed-dataTransmission SystemsSECOND EDITION,AUGUST 2005REAFFIRMED,AUGUST 2015ener光1AMERICAN PETROLEUM INSTITUTEFOREWORDChapter 5 of the API Manual of Petroleum Measurement Standards(API MPMS)providesrecommendations,based on best industry practice,for the custody transfer metering of liquidhydrocarbons.The various sections of this Chapter are intended to be used in conjunctionwith API MPMS Chapter 6 to provide design criteria for custody transfer metering encoun-tered in most aircraft,marine,pipeline,and terminal applications.The information containedin this chapter may also be applied to non-custody transfer metering.The chapter deals with the principal types of meters currently in use:displacement meters,turbine meters and Coriolis meters.If other types of meters gain wide acceptance for the mea-surement of liquid hydrocarbon custody transfers,they will be included in subsequent sec-tions of this chapter.Suggested revisions to this publication are invited and should be submitted to Measure-ment Coordination,Exploration and Production Department,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.API publications may be used by anyonedesiring to do so.Every effort has been made by the Institute to assure the accuracy and reli-ability of the data contained in them;however,the Institute makes no representation,war-ranty,or guarantee in connection with this publication and hereby expressly disclaims anyliability or responsibility for loss or damage resulting from its use or for the violation of anyfederal,state,or municipal regulation with which this publication may conflict.Suggested revisions are invited and should be submitted to API.Standards department,1220 L Street,NW,Washington,DC 20005.CONTENTSPage5.5.1INTRODUCTION.5.5.2SCOPE.5.5.3FIELDOF APPLICATION.15.5.4REFERENCED PUBLICATIONS.5.5.5 DEFINITIONS5.5.6 LEVELSOFSECURITY.I5.5.6.1 LevelE.15.5.6.2LevelD.25.5.6.3 Level C.25.5.6.4 Level B.25.5.6.5 LevelA.25.5.7 SYSTEM DESIGN CONSIDERATIONS.25.5.7.1 General Design Criteria.25.5.7.2 Totalizers.35.5.7.3 Typical Causes of Error.35.5.7.4 Signal Pre-Amplifiers.35.5.7.5 Standby Power Supply35.5.7.6Test Requirements.35.5.7.7General Precautions.35.5.8 INSTALLATION.35.5.8.1Signal Amplitude.35.5.8.2 Signal-To-Noise Ratio.35.5.8.3Commissioning.45.5.9 INSPECTION AND MAINTENANCE.45.5.9.1 Need for Inspection and Maintenance.45.5.9.2Guidelines.5Figures1 Typical Function Arrangement for a Level E Pulsing Security System.72 Typical Function Arrangement for a Level D Pulsing Security System.73 Typical Function Arrangement for a Level C Pulsing Security System.8Typical Function Arrangement for a Level B Pulsing Security System.8Typical Function Arrangement for a Level A Pulsing Security System.9