Long distance pipelines are the most effective way of transporting oil and natural gas, and non-destructive testing is a very important link and measure in the quality control of natural gas pipeline welding. Routine nondestructive testing includes radiographic testing, Ultrasonic testing, magnetic particle testing, penetrant testing, etc; Non routine inspection includes digital radiographic inspection, phased array inspection, automatic welding Ultrasonic testing, etc; In practice, for different types of quality defects, it is necessary to select corresponding detection methods based on engineering practice.
1. CG detection
2. DR testing
3. Pulse eddy current testing
4. Guided wave detection
5. Magnetic flux leakage testing
6. Phased array detection