Phased Array Code Status

8/11/2019 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


8/21

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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25 mm (1) Now superseded by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

Phased Array Code Status

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