[Pipeline Internal Inspection] Ф 325/355 Coalbed Methane Pipeline Internal Inspection Project Successfully Completed

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Time of issue:2025-04-29 09:04
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[Pipeline Internal Inspection] Ф 325/355 Coalbed Methane Pipeline Internal Inspection Project Successfully Completed

service content: pipe length 46.049km, pipe diameter 323.9/355.6, wall thickness 7.1mm, pipe material L360M, design pressure 3.9MPa. Including pipeline condition inspection, pigging operation, geometric diameter measurement, three-axis high-definition Magnetic Inspection, coordination with excavation verification, submission of original pipeline inspection data, pipeline corrosion inspection report, pigging report, pipeline geometric deformation, inspection report, pipeline excavation verification report, pipeline magnetic flux leakage inspection report, pipeline centerline data report.
Site construction:

large amount of coal ash and oil impurities removed from pigging operation

the residual stress of the pipe elbow is found in the inspection, and the pipe is deformed in many places.

Excavation verification: The 5 excavation verification points are consistent with the test results, and the verification defects include metal loss, abnormal circumferential Weld and sag.