Projectcomparison

APISPEC5L44th edition

SY/T5037 2000

GB/T9711.1 1997

GB/T9711.2 1999

Operatorrequirements

ISO11484 orASNTSNTTC 1A1, 2nd or3rd level

X-ray testingoperator shallcomply withGB/T9711.11997Ultrasonicinspectionpersonnel shallcomply withGB/T94451999

X-ray testingoperator shouldget trained,assessed andobtain approvalcertificates.

Qualifiedpersonnelaccording toGB/T9445 1999.

Nondestructivetesting time

The location ofSubmerged arcwelding steelpipenondestructivetestingequipmentdetermined bythe manufacturer.

X-ray inspectiontiming notmentioned andultrasonic testshould beperformed afterthe hydrostatictest.

the LSAW andSSAW steel pipeweldnondestructivetesting should beperformed afterthe hydrostatictest.

Submerged arcwelding seam

100% total wallthickness, totallength of theultrasonicinspection, X-rayinspectionprotocol(manufacturersand buyers dealwith raydetection insteadof ultrasonictesting).

100% total wallthickness, totallength of theultrasonicinspection, X-rayinspectionprotocol(manufacturersand buyers dealwith raydetection insteadof ultrasonictesting).

Tube lengthinspection withthe rayinspectionmethod, or atleast theminimum lengthof 203 mmlength rangeusing X-rayinspection, therest of theultrasonicinspection.

100% weldultrasonic testingand X-rayinspection.

Pipe end weldinspection

When there is ablind spot (1)automaticultrasonicinspectionsystem manual or

Same as above Ray inspection Ultrasounddetection oflongitudinaldefect: accordingto SY/T6423.3and D5.1.1 or

semiautomaticultrasonic Anglemethod or X-rayinspectionmethodsBlind spotinspection;(2) theapplication ofX-ray inspectionmethod for eachsteel pipe end atleast 200 mmlength of weldinspection, theinspection resultsshall be recordedon the medium orother image onthe film.

radiographictesting accordingto SY/T6423.1image qualitylevel R1, seeD5.5 (exceptthere areotherwiseprovisions);Ultrasound detectionof transversedefect: accordingto SY/T6423.3 orradiographictesting accordingto SY/T6423.1,press D5.4acceptance level.

Pipe end layeredinspection

If agreement,dealing with steeltube 25 mmparent metal,ultrasonicinspection toconfirm there isno ring in thearea to the defectsize greater than6.4 mm ofstratification.

Require the useof appearanceinspection, doesnot require themanufacturer ofthe specialinspection,except forspecified in thepurchase order inthe contractexcept specialnondestructivetesting.

Requirements forpipe endstratified usingsurface testing,not mentioned inthenondestructiveflaw detection.

If there isagreement,should be usedaccording to theregulation ofSY/T6423.7ultrasonicdetection methodin pipe endwithin 25 mmalong thecircumferentialdirection is notallowed to have asize greater than6 mm stratifiedlacking anything.

Layered tubebody inspection

If there isagreement,should berecognized byultrasonicinspection ofsteel strip/plateor pipe body

Does not requirethe manufacturerof the specialinspection, butthere arespecified in thepurchase order inthe contract

Made no mentionof the defectinspection of thepipe body.

If there isagreement,according toSY/T6423.5ultrasonicdetection, theacceptance levelB2.

there is nogreater thanISO12094:1994acceptance levelfor lacking B2stratified.

except specialnondestructiveexamination.

Steel strip edgesor near the welddefect layer

If there isagreement, theultrasonicinspection toconfirm eachedge of steelstrip/plate 15 mmor steel pipe weldwidth range oneach side there isno greater than15 mm rangespecified belowdefect layers: (1)such as stratifiedcheck beforesteel pipeforming, executeISO12094:1994acceptance levelfor E2;(2) or aslayeredinspection afterthe steel pipewelding, the lineISO13663:1995acceptance levelof E2.

Ultrasonic testingaccording toSY/T6423.5 orSY/T6423.4,acceptance levelE2.

Remanenceinspection

For D acuity168.3 mm flatend of the steeltube, and adoptedthe method ofelectromagneticinspection, orbefore shipmentby

In the tube beforeshipment, withinthe factoryshould adoptgauss metercalibrated halleffect orequivalentequipment in the

electromagneticequipmenthandling all ofthe smallerdiameter steelflat end, shouldbe finished flatend tube bluntedge or verticalcutting surfacelongitudinalmagnetic fieldmeasurement.Each work classEvery 4 h at leastchoose a pole,measure of itsboth ends.Seamless steelpipe each sidealong thecircumferentialdirection areseparated byapproximately 90measuring fourreadings.Whengauss meter byusing hall effectmeasurement,four readingshould be theaverage of 30 orless gs, and anyreading shouldnot be more than35 gs.

axial directionparallel to thepole to the pipeend face/groovesurface randommeasurement,each steel pipeend of remanentmagnetism shallnot exceed 30 gs.