标准椭圆封头拼接焊缝的射线探伤

(,466000)K,,KRADIOGRAPHICINSPECTIONOFTHEBUTTWELDSINSTANDARDELLIPTICSEALINGHEADSGuoLiaokuo(InstituteofBoilerandPressureVesselInspection,Zhoukou)AbstractByadiscussiononKvalue,theradiographictechnologyforthebuttweldsinstandardellipticsealingheadsconsistentwithcurrentstandardsandregulationsispresented.Ittakesonlytwotofourirradiationstoinspectasealingheadweldbyusingthetechnology.KeywordsSealingheadKvalueRadiographicinspectionWeld,A,,,,,,82:,,,C,K,KK,,1,,H(1)JB4730[1],ABK1.03,Hmax=cos-1(1ö1.03)=13.861TTH,H,K,:(1)(2)(3)22.12,54322820008NDTVol.22No.8Aug.2000©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.x2a2+y2b2=1a=2b=12Di2DiOHO2,x=2bcosty=bsint(t)0tPBBBtgA=yx=-12cott,BO2tgA=-1tgA=2tgt,BO2yO2B,O2(0,-3bsint)[2]2.2C2.2.1y,(2)Oy,O2,OO=y,O(0,-y)2H=G-BtgB=cotA=12cotttgG=BBOB=2bcosty+bsinttgH=3bsintõcost-ycost2b+2ysint(1)0H13.860tgH0.247yb=K,O(0,-y),HHmax=13.86t32sin2t-K(cost+0.494sint)0.494(2)32sin2t32cost+0.494sint=1.115sin(t+s)s=arccot0.49432-1.115Ksin(t+s)0.494,(2),0sin(t+s)1K0.902JB4730,y=b,C12Di2.2.2O(0,-b),19.47t90HHmax:2,OO2,b3bsint,1ö3sint1,19.47t90,Ht(1),tgHt(tgH)t=-3sin3t+6sin2t-sint-4(2+2sint)2(3)0,0,3sin3t+6sin2t-sint-4=0(4)(13sint1),sint10.7584(sint2=-1,sint3=-1.7584)sint=0.7584(tgH)t=00.7584sint1(tgH)t013sint0.7584(tgH)t0sint=13tgH=0sint=1tgH=0,tgHsint(3)sint=0.7584,tgH,(1)(tgH)max=0.236tgHmax=0.247O(0,-b),19.47t90,HHmax2.30t19.473643:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2.3.14,lB,ml1,nl2,1=2=13.86,HHmax4BlB2.3.2O(0,-12b),0t19.47HHmax:5,t=0,yO,OO=2btgHmax=2btg13.86=0.494b5O(0,-0.494b),t,BBO2,BO2yO24yMN,t=19.47,yO5,BOtgB,B=A-H=A-13.86tgAt=19.47BO2tgA=2tg19.47=0.7070A=35.26,BOtgB=tg(35.26-13.86)=0.392BO0.392=y-bsin19.47x-2bcos19.47(5)(5)x=0,y-0.406b,(0t19.47)y-0.494b-0.406b,0.494b0.5b=18Di,,,Di1200mm,18Di50(JBöT4737)[3]6,HO(0,-12b),H13.866,(0,-12b),0t19.473(1),,12Di,19.47t160.53;38Di,0t19.47,160.53t180(2)B(t=19.47t=160.53),,7,7743:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.12Di,7O2(0,-b),BB;38Di,7O(0,-12b),BB,H13.86B,ABAB=BA(x)2+(y)2dt(b+D)19.4701+3sin2tdtD,[4]AB=2(b+D)9070.551-322sinUdU=2(b+D)E90,32-E70.53,32=0.3688(b+D)=0.0922Di+0.3688D,,t=19.47HHmax,AB0.1Di,A(),B,B()(3),,,Di,,,,(4)B,(5),,,,,K=1,=0,80%[5],JB4730,,,JB4730,,,RH[6]1JB4730942..:,1993.65-683JBöT4737954.(É).:,1985.5.,1993,15(4):1106..:,1993.40-41:19992022151977,,,,,,NDT,82189,(25),200116,6.00(),,:23,:041526161157,:118002,:843:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.