1、Designation:D417720Manual of Petroleum Measurement Standards(MPMS),Chapter 8.2Standard Practice forAutomatic Sampling of Petroleum and Petroleum Products1This standard is issued under the fixed designation D4177;the number immediately following the designation indicates the year oforiginal adoption
2、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.This standard has been approved for use by agencies of the U.S.Department of Defense.INTRODUCTI
3、ONThe previous version of the automatic sampling practice described the design,installation,testing,and operation of automated equipment for the extraction of representative samples from the flowingstream and storing mainly for crude oil.This practice is a performance-based standard.It still include
4、s the design,installation,testing,andoperation of automated equipment for extraction of representative samples.It also includes the testingand proving of a sampling system in the field under actual operating conditions to ensure that theequipment,installation,and operating procedures produce represe
5、ntative samples.The acceptancecriteria for custody transfer are covered in this practice.This practice does not address how to samplecrude at temperatures below the freezing point of water.Extensive revisions have been made to theprior version of D4177(API MPMS Chapter 8.2).This practice also provid
6、es guidance for periodic verification of the sampling system.This practice is separated into three parts:GeneralSections 5 17(Part I)are currently applicable to crude oil and refined products.Reviewthis section before designing or installing any automatic sampling system.Crude Oil SamplingSection 18
7、(Part II)contains additional information required to complete thedesign,testing,and monitoring of a crude oil sampling system.Refined Product SamplingSection 19(Part III)contains additional information required tocomplete the design of a refined product sampling system.A representative sample is“A p
8、ortion extracted from the total volume that contains the constituentsin the same proportions that are present in that total volume.”Representative samples are required forthe determination of chemical and physical properties that are used to establish standard volumes,prices,and compliance with comm
9、ercial and regulatory specifications.The process of obtaining a representative sample consists of the following:the physical equipment,the correct matching of that equipment to the application,the adherence to procedures by theoperator(s)of that equipment,and the proper handling and analysis.1.Scope
10、*1.1 This practice describes general procedures and equip-ment for automatically obtaining samples of liquid petroleumand petroleum products,crude oils,and intermediate productsfrom the sample point into the primary container.This practicealso provides additional specific information about samplecon
11、tainer selection,preparation,and sample handling.If sam-pling is for the precise determination of volatility,use PracticeD5842(API MPMS Chapter 8.4)in conjunction with thispractice.For sample mixing and handling,refer to PracticeD5854(API MPMS Chapter 8.3).This practice does not coversampling of ele
12、ctrical insulating oils and hydraulic fluids.1This practice 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 Hydro
13、carbon Measurement for Custody Transfer(Joint ASTM-API).This practice has been approved by the sponsoring committeesand accepted by the Cooperating Societies in accordance with established proce-dures.This practice was issued as a joint ASTM-API standard in 1982.Current edition approved Oct.1,2020.P
14、ublished November 2020.Originallyapproved in 1982.Last previous edition approved in 2016 as D4177 161.DOI:10.1520/D4177-20.*A Summary of Changes section appears at the end of this standard Jointly copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,USA
15、 and the American Petroleum Institute(API),1220 L Street NW,Washington DC 20005,USAThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and
16、Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.11.2 Table of Contents:SectionINTRODUCTIONScope1Referenced Documents2Terminology3Significance and Use4PART IGENERALRepresentative Sampling Components5Design Criteria6Automatic Sampling Systems7Sampling Location8Mixing of the Flowing Stream9Proportionality10Sample Extractor Grab Volume11Containers12Sample Handling and Mixing13Control Systems14Sample System Security15System Proving(Performance Acceptan
