基于X射线计算机辅助成像技术的带料管道焊缝检测

Weld detection of pipeline with medium based on X-ray computed radiographic technology

采用便携式数字CR系统对某大型石化企业的400条压力管道进行了X射线计算机辅助成像检测(CR)。通过设置管道是否带料、采用不同射线源和是否考虑介质对透照的影响等三种情况的比对试验,验证了检测手段的可靠性及有效性。现场检测能发现管道对接焊缝的未焊透、未熔合、夹渣、气孔和裂纹等典型缺陷,并针对CR现场应用存在的一些问题进行了讨论,为CR技术在带料管道焊缝检测中的广泛应用奠定基础。

Using the portable digital CR system,the X-ray computer-aided image detection(CR)of 400 pressure pipelines in a large petrochemical enterprise was carried out.The reliability and effectiveness of the detection method are verified by the comparison test of whether the pipeline is equipped with medium,using different ray sources and considering the influence of the medium on the permeation.The typical defects of butt weld of pipeline,such as incomplete penetration,incomplete fusion,slag inclusion,air hole and crack,can be found in the field inspection.Some problems existing in the field application of CR are discussed,which lays a certain foundation for the wide application of CR technology in the inspection of weld seam of pipeline with medium.