There are three phases to in-pipeline inspection:
The first is the conventional pigging, which is usually completed by using a soft pig, a leather bowl pig, a magnetic pig, and a diameter pig, with the purpose of removing impurities, water and sulfate reducing bacteria (anaerobic bacteria) in the pipe, slowing down the corrosion in the pipeline, reducing the resistance of the pipeline, and preliminarily evaluating whether the geometric detector can pass smoothly.
The second is geometric detection, in addition to the above-mentioned inspection of the deformation and ovality of the pipeline, there is also the detection and evaluation of whether the missing detector can pass smoothly.
The third is "magnetic flux leakage detection", which is mainly to find pipeline metal loss defects, welding defects, oil theft valves, etc.
After the on-site inspection work is completed, the following workflow is entered:
●Analyze massive data;
●Issue a preliminary report to find out major defects;
●Issuance of formal report and excavation verification;
●Evaluate pipeline defects and formulate repair plans;
●Formulate a repair plan, complete the defect repair, and eliminate the hidden dangers of the pipeline body.
