Differences between EMAT and GWUT

[danodco]

Hi,

I would like to know the difference between EMAT and GWUT for piping inspections. I know that they are both screening tools and the sizing of defects needs to be confirmed but other methods (e.g. UT spot thickness measurements).
What are the differences insofar as:
1. Surface preparation required
2. Range
3. Output (relative thickness or absolute thickness measurements)
4. Setup time to inspect piping
5. Limitations

Thanks

 

[0707]

ttps://

http://www.bing.com/videos/search?q...F8CBFB7904582CEC2103F8C&view=detail&FORM=VIRE

https://www.bing.com/videos/search?...9DC2FDF159AD47A64DAE9DC&view=detail&FORM=VIRE

https://www.innerspec.com/knowledge/emat-technology/#:~:text=EMAT or Electro Magnetic

https://inspectioneering.com/tag/gwut

luis