标准结构UT工艺

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1、ULTRASONICTESTINGPROCEDURE(STRUCTURE)EQUIPMENTUltrasonicTestInstrumenta)Theultrasonictestinstrumentshallbethepulse-echotypesuitableforusewithtransducersoscillatingatfrequenciesbetween2and6MHz.b)Theinstrument'sdisplayshallbeanuAnscanrectifiedvideotrace・Thedynamicrangeofthedispl

2、ayshallbesuchthatadifferenceof1dBofamplitudecanbeeasilydetectedonthedisplay.c)Thehorizontallinearityofthetestinstrumentshallbequalifiedwithin1%overthefullsoundpathdistaneetobeusedintesting.d)Theinstrumentshallalsoprovideaamplifierlinearitywithin5%offullscreenheight.e)Theinstru

3、mentshallhaveacalibratedgain(Attenuation)electricallyaccuratetowithinplusorminus2dBoverarangeofnotlessthan60dB.f)Eachinstrument-transducercombinationshallbecapableofproducingaminimum3/4CRTverticalscaledeflectionfromanechoreceivedfromthe4in.radiuscurvedsurfaceoftheIIWcalibratio

4、nblockwithaminimumof40dBamplificationinreserve.ProbeProbesasastraightbeamprobes0degreeandanglebeamprobesof45,60and70degree.TheselectionofprobeshallbeinaccordancewithclientspecificationandactualWPS(thickness,weldingbevel,etc.)Straightbeamprobea)Straightbeamprobesshallberoundins

5、hapeandshallhaveanactiveareaofnotlessthan12.5mmindiameternormorethan25mmindiametermaximam.b)Thefrequencyshallbebetween2to5MHz.c)ProbesofothersizesandfrequenciesmaybeusedprovidedtheyarequalifiedasdescribedinAPIRP2Xcodeandapprovedbydient.4.2.2Anglebeamprobea)Theoscillatingelemen

6、tshallbeapproximatelysquare/orroundinshapewithdimensionswhichresultinanincludedbeamangleofapproximately15degreesat6dBlessthanthecenterlinemaximum.b)Aprobewithatransducerelementinsizefrom8to13mminwidthand9to13mminheightoperatingat2to5MHzshallbemostlyusedinaccordancewiththecode'

7、srecommendations.c)Theprobeshallproduceasoundbeaminthematerialbeingtestedwithin±2degreesofoneofthefollowingproperangles:45,60and70degrees.Theactualangleshallbecheckedorverifiedduringcalibrationfortestingandreportedontheapplicabletestreport.d)Eachprobeshallbeclearlymarkedtoindi

8、catethefrequencyofthetransducer,nominalangleofreflectionandin