ASTM_D_7829_-_13e1.pdf

Designation:D7829131Manual of Petroleum Measurement Standards(MPMS),Technical Report 2573Standard Guide forSediment and Water Determination in Crude Oil1This standard is issued under the fixed designation D7829;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEAPI information was added editorially in September 2013.1.Scope1.1 This guide covers a summary of the water and sedimentdetermination methods from the API MPMS Chapter 10 forcrude oils.The purpose of this guide is to provide a quickreference to these methodologies such that the reader can makethe appropriate decision regarding which method to use basedon the associated benefits,uses,drawbacks and limitations.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D473 Test Method for Sediment in Crude Oils and Fuel Oilsby the Extraction Method(API MPMS Chapter 10.1)D4006 Test Method for Water in Crude Oil by Distillation(API MPMS Chapter 10.2)D4007 Test Method for Water and Sediment in Crude Oil bythe Centrifuge Method(Laboratory Procedure)(APIMPMS Chapter 10.3)D4057 Practice for Manual Sampling of Petroleum andPetroleum Products(API MPMS Chapter 8.1)D4177 Practice for Automatic Sampling of Petroleum andPetroleum Products(API MPMS Chapter 8.2)D4377 Test Method for Water in Crude Oils by Potentiomet-ric Karl Fischer TitrationD4807 Test Method for Sediment in Crude Oil by Mem-brane FiltrationD4928 Test Method for Water in Crude Oils by CoulometricKarl Fischer TitrationD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and Petroleum Products(API MPMS Chap-ter 8.3)2.2 API Standards:3API MPMS Chapter 8.1 Standard Practice for Manual Sam-pling of Petroleum and Petroleum Products(ASTMD4057)API MPMS Chapter 8.2 Standard Practice for AutomaticSampling of Petroleum and Petroleum Products(ASTMD4177)API MPMS Chapter 8.3 Standard Practice for Mixing andHandling of Liquid Samples of Petroleum and PetroleumProducts(ASTM D5854)MPMS Chapter 10.1 Standard Test Method for Sediment inCrude Oils and Fuel Oils by the Extraction Method(ASTM D473)MPMS Chapter 10.2 Standard Test Method for Water inCrude Oil by Distillation(ASTM D4006)MPMS Chapter 10.3 Standard Test Method for Water andSediment in Crude Oil by the Centrifuge Method(Labo-ratory Procedure)(ASTM D4007)MPMS Chapter 10.4 Determination of Water and/or Sedi-ment in Crude Oil by the Centrifuge Method(FieldProcedure)MPMS Chapter 10.7 Standard Test Method for Water inCrude Oils by Potentiometric Karl Fischer Titration(D4377)MPMS Chapter 10.8 Standard Test Method for Sediment inCrude Oil by Membrane Filtration(D4807)MPMS Chapter 10.9 Standard Test Method for Water inCrude Oils by Coulometric Karl Fischer Titration(D4928)1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and the API Committee on PetroleumMeasurement,and is the direct responsibility of Subcommittee D02.02/COMQ,thejoint ASTM-API Committee on Hydrocarbon Measurement for Custody Transfer(Joint ASTM-API).Current edition approved May 1,2013.Published July 2013.DOI:10.1520/D7829-13E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Petroleum Institute(API),1220 L.St.,NW,Washington,DC 20005-4070,http:/www.api.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Significance and Use3.1 Theoretically,all of the sediment and water determina-tion methods are valid for crude oils containing from 0 to100%by volume sediment and water;the range of applicationis specified within the scope of each method.The round robinsfor all methods were conducted on relatively dry oil.Allprecision and bias statements included in the methods arebased upon the round robin data.Analysis becomes morechallenging with crude oils containing higher water contentsdue to the difficulty in obtaining a representative sample,andmaintaining the sample quality until analysis begins.3.2 Currently,Karl Fischer is generally used for dry crudeoils containing less than 5%water.Distillation is mostcommonly used for dry and wet crude oils and where separatesediment analysis is available or in situations where thesediment result is not si