1、Designation:E196111Standard Practice forMechanized Ultrasonic Testing of Girth Welds Using ZonalDiscrimination with Focused Search Units1This standard is issued under the fixed designation E1961;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 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.Scope*1.1 This practice covers the requirements for mechanizedultrasonic examination of girth welds.Evaluation
3、 is basedupon the results of mechanized ultrasonic examination.Accep-tance criteria are based upon flaw limits defined by anEngineering Critical Assessment(ECA)or other accept/rejectcriteria defined by the Contracting Agency.1.2 This practice shall be applicable to the development ofan examination p
4、rocedure agreed upon between the users ofthis practice.1.3 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses are forinformation only.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is th
5、eresponsibility 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 The following documents form a part of this practice tothe extent specified herein:2.2 ASTM Standards:2
6、E164 Practice for Contact Ultrasonic Testing of WeldmentsE317 Practice for Evaluating Performance Characteristics ofUltrasonic Pulse-Echo Testing Instruments and Systemswithout the Use of Electronic Measurement InstrumentsE543 Specification for Agencies Performing NondestructiveTestingE1316 Terminol
7、ogy for Nondestructive Examinations2.3 ASNT Standard:3ASNT Practice SNT-TC-1A Personnel Qualification andCertification in Nondestructive TestingANSI/ASNT-CP-189 Standard for Qualification and Certifi-cation of Nondestructive Testing Personnel2.4 AIA Standard:NAS-410 Nondestructive Testing Personnel
8、Qualificationand Certification42.5 API Standard:API STD1104 Welding of Pipeline and Related Facilities52.6 CSA Standard:CSA Z-662 Oil and Gas Pipelines Systems63.Terminology3.1 Definitions:3.1.1 Definitions relating to ultrasonic examination,thatappear in Terminology E1316 shall apply to the terms u
9、sed inthis practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 acceptancecriteriadefinitionofacceptable/rejectable flaws as defined by an Engineering Critical Assess-ment(ECA),such as defined in CSA-Z662 or API 1104,orworkmanship criteria as defined by the contracting agency.3.2.2 cont
10、ract documentany document specified in thecontract between the contracting agency and contractor,includ-ing the purchase order,specification,drawings or other writtenmaterial.3.2.3 contracting agencya government agency,primecontractor or subcontractor procuring ultrasonic examinationservices.3.2.4 c
11、ontractorthe nondestructive examination contrac-tor engaged by the contracting agency in work covered by thispractice.1This practice is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.06 onUltrasonic Method.Current edition
12、approved July 1,2011.Published July 2011.Originally approvedin 1998.Last previous edition approved in 2006 as E1961-06.DOI:10.1520/E1961-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume in
13、formation,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 Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,
14、Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.5Available from American Petroleum Institute(API),1220 L.St.,NW,Washington,DC 20005-4070,http:/www.api.org.6Available from Canadian Standards Association(CSA),5060 Spectrum Way,Mississauga,ON L4W 5N6,Canada,http:/www.csa.ca.*A Summary of
15、Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.5 mapping type presentationsan ultrasonic image pre-sentation whereby the digitized A-scan signal is represented ascolors or grayscale
16、for amplitude variation along one axisrepresenting time of flight and the other axis is the samplingposition,or the distance along the weld.3.2.6 operator(s)the term“operator(s)”as used in thispractice shall mean the operator(s)of ultrasonic equipmentwho is(are)certified according to the requirements in 5.2 andat a level deemed acceptable to the contracting agency.4.Significance and Use4.1 This practice is intended primarily for the mechanizedultrasonic examination of pipe girth welds used in th
