管道钢管壁厚超声波检测技术

摘要

The wall thickness of steel pipe used for pipeline is thinning until perforated due to corrosion after the pipeline has operated for a long time. Using ultrasonic thickness measurement technology under the condition of no damage to pipeline, which can realize accurate measurement for pipe wall thickness, and found the pipe internal defects. In this article, the principle of ultrasonic thickness testing technology, selection of ultrasonic thickness testing devices, method and operating steps were introduced. The main influence factors of ultrasonic thickness measurement technology were analyzed, and the disposition method for problems occurred in the process of thickness testing were provided.%针对油气输送管道长时间生产运行中的腐蚀造成的管道钢管壁厚逐渐减薄甚至穿孔现象，采用超声测厚技术在不损坏管道的情况下，可实现准确测量管道壁厚，并发现管道内部缺陷。介绍了钢管超声测厚技术的原理、超声测厚装置的选择、超声测厚方法及其操作步骤，分析了钢管超声测厚的影响因素，并对钢管测厚过程中出现的问题给出了处理办法。钢管超声测厚技术具有无损管道且测量精度高的特点，还可用于油井管壁厚的检测。