Download - Phased Array Code Status
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Presentation outline
Code activities:
ASME, ASME and ASME
ASTM
API
AWS
Others
Where do we stand today?
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ASMEASME Code Case 2235
S-scans
PA Code CasesMandatory Appendix
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ASME
Accepts phased arrays specifically asComputerized Imaging Technology or
CITs.
Need to have techniques and proceduresapproved
Typically use Performance Demonstration
approach.
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ASME Code Case 2235
Recent code case for using UT insteadof RT
Based on Performance Demonstration,(like ASME Section V Article 14)
Requires detecting three defects (ID,OD, sub-surface)
Requires full data collection andencoder
Can fulfill with single linear pass
Often interpreted as TOFD, but can bepulse-echo or combination, or PA.
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Code activitiesS-scans
Realized limitations of single pass S-scans and ASME Code Case 2235
Published paper in MatEval in January
2005 on S-scan limitations, basedlargely on modeling
Showed limitations of S-scans,especially for thick walls
Generated several comments, mostlyfrom people who didnt read it properly!
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S-scans for weldsCan calibrate S-scans at any angle on ASME SDH
S-scan does not necessarily give best angles for weld
inspections, especially with single pass
Concept of bevel incident angle (BIA) on weld
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ASME cautionary paragraph
Submitted cautionaryparagraph on S-scans
to ASME
Now in ASME CC
2235-8/9
Recommended
against single S-scans
for walls >25 mm (1) Now superseded by
upcoming PA code
cases
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ASME PA code cases
Prepared phased array code cases forPAs
Single beam rastering, manual E- and S-
scans, encoded E-scans, and S-scans.PA group: Ed Ginzel (MRI), Mark Davis
(Davis NDE), Chris Magruder and MM
First code case approved (2541); manualS-scans and E-scans going through
ASME.
Linear scanning code cases in progress.
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ASME Phased Array Appendix
Working Group recommended full ASMEMandatory Appendix for phased arrays:manual and encoded. Drafted.
Typically acceptance much slower than withcode case approach
Generic ASME procedure for welds now
available.
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APIQUTE UT1 and UT2
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Code activities - API
Master plan with Davis NDE; has manyAPI-evaluated weld samples
Approach used API UT 1 and UT 2procedures with no changes
Essentially scan known samples usingnew technology/techniques
Trial in Dec 2005; went very well
Still waiting for official approval, butexpected
Generic procedure almost available.
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AWSAWS D1:1 Structural Welding Code
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Code activities - AWS
Demonstrated AWS D1:1 compliance thruAnnex K and Smith-Emery in LA
A special; plan on publishing
Major problem: each case required theEngineers approval
Final solution: with 2006 version => newtechnology/technique approvals are codified
Generic AWS procedure available.
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ASTMRecommended Practice
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Code activitiesASTM
Recommended practice for phasedarray set-up prepared by Ed Ginzel,
MRI
Recently publishedWill require full angle corrected gain
(ACG) over SDH calibration range
Also requires TCGLimits to angular range based on
recommendations and calibration.
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Code activitiesASTM
From Insight
Under proposed
ASTM RP, this
angular range is
unlikely to be
calibrate-able.
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Other CodesGlobal assessment
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Other Codes
Relatively little PA code activity elsewhereNorth America leading due to push from
Olympus NDT and associated companies
Europe: interest in PA qualifications, but noPA code work yet. EN1714 status unclear.
ISO: No significant activity yet
Japan: Appendix for PA use in crack sizing,otherwise limited.
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Code activitiessummary (1)
Phased arrays inherently accepted byASME
But, may need to get techniques andprocedures approved via Performance
Demonstration approaches (ASME Section V Article 14 good
approach for approvals with PerformanceDemonstration)
Code Cases in progress
Ultimately, will codify in new MandatoryAppendix.
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Code activitiessummary (2)
ASTM RP for PA set-up in printAPI approval pendingwent well
AWS special in late 2005; now working on
full codification in 2006Other codes unclear
Objective: single pass, code-compliant
inspections using E- or S-scans, manual orencoded