Abstract
The wavelet-based analysis of electromagnetic acoustic transducer (EMAT) signals for inline inspection of flaws in a 30-in.-dia natural gas pipeline was presented. The sensor could detect physical flaws (stress corrosion cracks, circumferential and axial flaws, and corrosion) in the walls of gas pipelines. Using an in-line non-contact EMAT transmitter-receiver pair, flaws could be detected in the walls of a pipe that the more commonly used magnetic flux leakage technology has problems detecting. One EMAT was used as a transmitter, exciting an ultrasonic impulse into the pipe wall, while the second EMAT, located a few inches away from the first, was used as a receiving transducer. The results using this approach showed potential for EMAT measurements obtained from a translating pipe inspection gauge. The EMAT signal becomes greatly attenuated in the presence of tar coating. This is an abstract of a paper presented at the Gas Technology Institute's Natural Gas Technologies 2005 Conference (Orlando, FL 1/30/2005-2/2/2005).
| Original language | English |
|---|---|
| State | Published - 2005 |
| Event | GTI Natural Gas Technologies 2005: What s New and What s Next - Orlando, FL, United States Duration: Jan 30 2005 → Feb 2 2005 |
Conference
| Conference | GTI Natural Gas Technologies 2005: What s New and What s Next |
|---|---|
| Country/Territory | United States |
| City | Orlando, FL |
| Period | 01/30/05 → 02/2/05 |