What is the guided wave method?
The method employs mechanical stress waves that propagate along an elongated structure while guided by its boundaries. This allows the waves to travel a long distance with little loss in energy.
Easy to understand synopsis
Transducer Ring attached to the pipe send waves tens of feet along the pipe wall and the returning echoes indicate whether metal loss is present. Physical access to the pipe is only required at the position of the transducer.
Example of Transducer Set up and Sample Corrosion Detection.
- Long range inspection – potential to achieve hundreds of feet of inspection range at one time.
- Rapid screening with 100 % coverage.
- Limited access – insulated lines with minimal (a few inches) insulation removal, corrosion under supports without need for lifting, inspection of corroded risers, inspection at elevated locations without the need for scaffolding, and inspection buried pipes.
- Detection of internal and external wall loss.
- Increased efficiency of a client’s inspection budget, due to being able to inspect more equipment in one day than that of other conventional methods.
- The portability of the equipment makes it well suited for inspecting risers off-shore
Data Collection and Reporting Advantages
- Data is fully recorded and is reproduced on a formal report. Entire GW scan is saved electronically as well and can be available during audits or to review past history during reinspection intervals.
- Fully automated data collection protocols.