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NDT2009316,,,,(,833600):,,2,,,,,,:;;;;:TG115.28:A:100026656(2009)0620478203TheTechnologyofMeasuringtheThicknessofaCertainSpotoftheTubeUnderHighTemperatureCUIKe2Long,LEIJun2Liang,KONGZhao2Hui,HUANGXin2Quan,YUELi2Xin(PetroChinaDushanziPetrochemicalCo,Dushanzi833600,China)Abstract:Theproblemofbigdatadifferenceandtheincapabilityofreadingdatacausedbyusinginappropriatecouplantexistedduringtheprocessofmeasuringthethicknessatthecertainspotathightemperatures.Linearequationofsonicspeedunderhightemperatureindifferentmaterialswasderivedfromlinearregressiveanalysisontheexperimentaldataofsonicspeedbothundercertaintemperatureandthetemperaturebelow.Theequationwasappliedtomeasurethethicknessofacertainplaceonthetubeunderhightemperaturecircumstancesaccuratelyandconvenientlywhichcouldsolvetheproblemofcoincidentlargedataeffectively.Otherwise,throughtheresearchontheperformanceofdifferentcouplants,theappropriatecouplantswhichwereabletoeffectivelycoupleunderhightemperaturewerescreened.Keywords:Ultrasonicthicknessmeasurement;Tube;Hightemperature;Couplant;Linearregressiveanalysis,,,,,()[1],:2008207207:(1981-),,,,,,,,,,,1,,;1.1874:NDT200931620Cr5Mo16Mn1828316L,5,810mm,1.2KKDM4,HT400600;0.6300mm;99.99mm0.01mm,99.99mm0.1mm;10009999m/sHY2302A,0500,1SX2,KSW1.3(1)(2)12042020(3),,23s;,,;,,,,(4),,(5),5s,1.416Mn,1,,,,[1],TH0Ht:Ht0=16.26+(Htt-16.71)-2.23510-3(Tt-310)1.1410-4(Tt-310)+1.025(1)Hb0=15.40+(Hbt-15.88)-1.89910-3(Tb-310)1.06610-4(Tb-310)+1.025(2)Ht0,mm;Hb0,mm;Htt,mm;Hbt,mm;Tt,;Tb,(1)(2),,[2],,:v=5918-0.85T(3)v,m/s;T,(3),,,,,,116Mn/12/mm/(ms-1)/mm/(ms-1)/mm/(ms-1)/mm/(ms-1)10.04592010.04592010.04592010.04592014010.46592010.04567510.06567510.04567518010.56592010.04562510.06562510.05562522010.62592010.05558010.04558010.04558026010.70592010.06555010.05555010.05555030010.79592010.07550510.04550510.05550534010.91592010.08546010.06546010.07546038010.96592010.05542010.10542010.07542042011.06592010.06538210.10537510.085375974:NDT2009316,2,1,(1):v=-1.05T+5839.5R2=0.9983(4)116Mn220Cr5Mo1828316L2(4)120420,(4),1.5,,,,,300,,,KKZGMSONOTECHSONOGW,2,120200ZGMGW2SONO600;200300SONO600SONO900,SONO900;300420SONO900SONO110022.1(1):,30m/s,1m/s()(2),20m,,1020m,,10m(3)()(4)(5),(,)2.2200712,,20078,3,,3(1),(2),2,2/120200300420ZGM,550,,,GW-,200350,,GW-,300500,,SONO600,0315,,SONO900,315480,,,SONO1100,370590,(505)084:NDT2009316(a)(b)31,331,,33.2380%,812dB3.3,,1030,,,,,,,44,,,,,55(12),,6456:[1].[M].:,1989.[2].[J].,1989,11(4):102.[3].[M].:,1980.(480)3/mm//mm/mmDZL011320425103008.68.7DZL0015E-28Cr5Mo325834511.111DZL0010()1011462408.07.9DZL0010()1011462409.39.7,,(3)SONO600SONO900:[1].[J].,2000,17(2):47.[2].[J].,2000,19(6):49-53.505