管道内壁横向裂缝的超声波探伤

NDT2009318,(上海电气电站设备有限公司上海汽轮机厂,上海200240):某厂提供给电厂的12Cr2Mo钢管管道在现场安装过程中,发现钢管内表面存在严重的横向裂缝,经调查,该批钢管的横向裂缝有一定的普遍性对钢管裂缝的形成原因进行了调研与分析,并为今后避免产生此类缺陷,提出了对该规格的钢管,采取钢锭直接轧制的生产方法,并且建议钢管制造企业对高压锅炉管横向缺陷和纵向缺陷的检验都应进行检验:超声波探伤;管道;裂缝;连铸坯:TG115.28:A:1000-6656(2009)08-0664-02TheUltrasonicTestingtotheTransverseCrackonInnerSurfaceofPipelineZENGY-iXiong,SHENZhi(ShanghaiElectricPowerGenerationEquipmentCo,Ltd,ShanghaiTurbinePlant,Shanghai200240,China)Abstract:Duringfieldinstallation,the12Cr2Mosteelpipesprovidedbyaplantwerefoundtohavetransversecracksontheinnersurfaceofthem.Investigationtellsussuchkindofcracksexistcommonlyinthesesteelpipes.Weexaminedandanalyzedthesecracksandforthepurposeofavoidingtheminthefuture,proposedthatthemethodofdirectrollingshouldbeadoptedforthepipesofthisspecification,andsuggestedpipemanufacturesshouldperformultrasonicinspectionforbothtransverseandlongitudinaldefects.inHPboilerpipes.Keywords:Ultrasonictesting;Pipele;Crack;Continuouscastingblank20078,12Cr2Mo193.7mm32mm(),300mm350mm,,,121:2009-01-24:(1952-),,,,,2:540170kg,,811.1:CTS-23;:8mm9mm,K1.0,2.5MHz;:CSK-30mm,1.0mm40%;:2dB664曾义雄等:管道内壁横向裂缝的超声波探伤NDT无损检测20093181.28,,,,,2~352,40%6~8dB,18dB,,,16dB,302834,,,,,222.1,:EAF()LF()VD()()250mm,250mm114~351mm193.7mm32mm,,,,,193.7mm32mm,,2.2GB57771996:,GB53102008,,,,3(1),,GB/T57771996,2,,,,,(2),,,,,,,,:(3)CSK-30mm,1.0mm194mm32mm1.5mm,2dB,,CSK-30mm,1.0mm4(1)250mm193.7mm32mm,(2)665