埋地钢质管道的检测分为管道内检测和管道外检测,管道内检测是指利用超声、漏磁、扫描、摄像等原理,将管道割开放进管道内检测器,利用输管介质的压差推动管道内检测器前行的方法来实施检测的。因为检测设备和费用的昂贵,且需停产,并要采取改造部分有碍检测器前行的三通、弯头、阀门、内径公差、几何变形、内部结垢等措施,使得这一技术很难在国内管道界普遍推广.取而代之的是以内涂层,加药杀菌、干燥、净化、脱水、脱硫等措 Buried steel pipe testing is divided into pipe testing and pipe testing, pipe testing is the use of ultrasound, magnetic flux leakage, scanning, camera and other principles, the pipe cut into the pipeline detector, the use of pipeline pressure Poor push the detector in the pipeline forward to implement the test. Because the testing equipment and the cost are expensive, and need to be discontinued, and to take measures to transform the three-way, elbow, valve, diameter tolerance, geometric deformation, internal scaling and other measures hinder the detector forward, making this technology is very difficult In the domestic pipeline industry to promote. Instead, the coating, sterilization, drying, purification, dehydration, desulfurization and other measures