ASTM_E_3052_-_16.pdf

Designation:E305216Standard Practice forExamination of Carbon Steel Welds Using Eddy CurrentArray1This standard is issued under the fixed designation E3052;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.1.Scope1.1 This practice covers the use of eddy current arraysensors for nondestructive examination of carbon steel welds.It includes the detection and sizing of surface-breaking cracksin such joints,accommodating for nonmagnetic and noncon-ductive coating up to 5 mm thick(typical)between the sensorand the joint.The practice covers a variety of cracking defects,such as fatigue cracks and other types of planar discontinuities,at various locations in the weld(heat-affected zone,toe area,and weld cap,for example).It covers the length and depthsizing of such surface-breaking discontinuities.This practicecan be used for flush-ground and not flush-ground welds.Forspecific ferrous alloys or specific welded parts,the user mayneed a more specific procedure.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:2E543 Specification for Agencies Performing NondestructiveTestingE1316 Terminology for Nondestructive ExaminationsE2261 Practice for Examination of Welds Using the Alter-nating Current Field Measurement TechniqueE2884 Guide for Eddy Current Testing of Electrically Con-ducting Materials Using Conformable Sensor ArraysE2905 Practice for Examination of Mill and Kiln Girth GearTeethElectromagnetic Methods2.2 ASNT Documents3SNT-TC-1A Recommended Practice for Personnel Qualifi-cation and Certification In Nondestructive TestingANSI/ASNT-CP-189 Standard for Qualification and Certifi-cation of Nondestructive Testing Personnel2.3 Other Standards:ISO 9712 Nondestructive TestingQualification and Certi-fication of Nondestructive Testing Personnel4NAS410 Certification and Qualification of NondestructiveTesting Personnel3.Terminology3.1 Definitions:For definitions of terms relating to thispractice,refer to Terminology E1316,Guide E2884 andPractice E2905.The following definitions are specific to theexamination of carbon steel welds using eddy current array:3.1.1 air reference measurement,nthe measured responseof the sensor and instrumentation to a nonmagnetic andelectrically insulating reference material such as air.3.1.1.1 Discussionthe instrument shall process this mea-surement as a reference response for signal adjustment.Mea-surements on conductive materials after air reference measure-ment should provide absolute electrical properties and lift-offvalues.3.1.2 encoderaspatialsensingdevice(basedonmechanical,optical,or electromagnetic principles,for ex-ample)allowing for accurate monitoring of a sensors positionduring data collection,used to construct spatially referenceddata presentations.3.1.3 examined part reference measurementthe measuredresponse of the sensor and instrumentation to the magnetic partto be examined.3.1.3.1 Discussionthe instrument shall be capable of mea-suring and recording the response of the sensor on the part tobe examined,and compensate for specific material properties.1This test method is under the jurisdiction of ASTM Committee E07 onNondestructive Testing and is the direct responsibility of Subcommittee E07.07 onElectromagnetic Method.Current edition approved Feb.1,2016.Published February 2016.DOI:10.1520/E3052-16.2For 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 fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.4Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.4 known material reference measurementthe mea-sured response of the sensor and instrumentation to a givenmaterial with known,homogeneous properties(such as alumi-num 6061-T6,for example).3.1.4.1 Discussionthe instrument shall process this as areference response for signal adjustment and standardization toprovide values that are similar for all of the sense elements.4.Significance and Use4.1 Eddy Current Array