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Wet Gas Flowmetering GuidelineASME MFC-19G2008(Technical Report)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Wet Gas Flowmetering Guideline ASME MFC-19G2008 THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Three Park Avenue New York,New York 10016-5990 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:July 11,2008 This Technical Report will be revised when the Society approves the issuance of a new edition.There will be no addenda or written interpretations of the requirements of this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.ASME does not approve,rate,or endorse any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical Engineers Three Park Avenue,New York,NY 10016-5990 Copyright 2008 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.iii CONTENTS Foreword.v Standards Committee Roster.vi 1 Introduction.1 2 Symbology and Definitions.1 3 Types of Wet Gas Flows.12 4 Flow Pattern.12 5 Flow Pattern Maps.16 6 Meters Used With Wet Gas Flows.18 7 Wet Gas Sampling.57 8 Pressure,Volume,and Temperature(PVT)Phase Property Calculations.58 9 Wet Gas Flowmetering Practical Problems and Recommended Practices.59 10 Uncertainty of a Wet Gas Metering System.72 Figures 4-1 Horizontal Wet Gas Flow Patterns.14 4-2 Vertical Wet Gas Flow Patterns.15 5-1 A Horizontal Flow Pattern Map.17 5-2 General Flow Pattern Map.17 6.1.1-1 Reproduction of Murdocks Two-Phase Flow Orifice Plate Meter Plot.21 6.1.1-2 Wet Gas Flow Venturi Meter Data.22 6.1.1-3 Wet Gas Flow Venturi Meter Data With Separated Pressure.22 6.1.1-4 Gas Flow Venturi Meter Data With Separated Frg.22 6.1.1-5 NEL Wet Gas 4-in.Venturi Data for 31 Bar(a),Frg=1.5.24 6.1.1-6 NEL 4-in.,Schedule 80,0.75 Beta Ratio Venturi Meter,Gas-to-Liquid Density Ratio of 0.046,Gas Densiometric Froude Number of 1.5.25 6.1.1-7 NEL 4-in.,Schedule 80,0.75 Beta Ratio Venturi Meter,Gas-to-Liquid Density Ratio of 0.046,Gas Densiometric Froude Number of 2.5.25 6.1.1-8 NEL 4-in.,Schedule 80,0.75 Beta Ratio Venturi Meter,Gas-to-Liquid Density Ratio of 0.046,Gas Densiometric Froude Number of 4.5.26 6.1.1-9 4-in.and 2-in.Venturi Meters With Similar Wet Gas Flows Showing a DP Meter Diameter Effect.26 6.1.2.1-1 NEL/Stewarts Turbine Meter Wet Gas Response for Liquid Mass Fraction of 2%.28 6.1.2.1-2 Tings Turbine Meter Wet and Dry Gas Flow Rate Results at CEESI.29 6.1.2.1-3 Turbine Meter Wet Gas K-Factor Deviation Results.30 6.1.2.2-1 Washington 25,26 Field Data for Wet Natural Gas Flow.31 6.1.2.2-2 NEL Nitrogen/Kerosene 30 bar Vortex Shedding Meter Data.32 6.1.2.2-3 NEL Nitrogen/Kerosene Vortex Shedding Meter Data Capped at Maximum LockhartMartinelli Parameters Before Data Becomes Erratic.33 6.1.2.2-4 Results of the Linear Fit Wet Gas Correlations Presented in Fig.6.1.2.1-2 for Known Liquid Flow Rates.33 6.1.2.3-1 NEL 4-in.Coriolis Meter 30 bar Wet Gas Data.35 6.1.2.3-2 NEL 4-in.Coriolis Meter 30 bar Total Mass Flow Rate Wet Gas Data.35 6.1.2.3-3 2-in.Micro Motion Coriolis Flow Meter Wet Gas Test Data.36 6.1.2.3-4 Endress+Hauser Coriolis Flow Meter,XLM 0.035.37 6.1.2.3-5 Micro Motion Coriolis Meter,XLM,due to the blocking effect of the liquid phase causing a gas velocity increase.For low liquid loading,dry gas meters are often used to predict the gas flow rate.These meters are often sized using an expected Reynolds number range based on eq.(2).