苯酚管道数字射线在线检测试验研究

Experimental Study on Digital Ray Online Detection of Phenol Pipeline

针对化工装置的苯酚管道在线检测的需求,通过制作含埋藏缺陷的不同管径的试样,选择合适的透照工艺参数,在有无介质的两种工况下,分别开展数字射线检测试验,研究缺陷的检出情况。通过对比研究检测结果发现后,管径DN 250 mm及以下含介质管道,气孔、未焊透等体积型可以有效检出,裂纹等面积型缺陷一定条件下可以检出,说明苯酚管道数字射线在线检测具有可行性。

In response to the demand for online detection of phenol pipelines in chemical plants,different diameter samples containing buried defects were made,and appropriate radiographic process parameters were selected.Digital radiographic testing tests were conducted under two working conditions with and without media to study the detection of defects.After comparing the test results,it was found that volume type defects such as porosity and incomplete welding can be effectively detected for medium containing pipelines with a diameter of DN 250 mm and below,while area type defects such as cracks could be detected under certain conditions,indicating the feasibility of digital ray online detection for phenol pipelines.