论文部分内容阅读
nsidering the various difficulties in ultrasonic detecting of in service industrial pressure bearing pipeline butt welds,the research group gives special probes,calibration blocks and a recommended detecting method suitable for the wall thickness 4 to 8 mm circumferential butt welds of pipeline.
nsidering the various difficulties in ultrasonic detecting of in service industrial pressure bearing pipeline butt welds, the research group gives special probes, calibration blocks and a recommended detecting method suitable for the wall thickness 4 to 8 mm circumferential butt welds of pipeline.