liquid in pipeline (posted in BPV)

[picasa]

How do you detect if a decomissioned pipeline has any liquid in it (remnant). You dont want to cut into the line. You got to use some kind of measurement technique to detect any liquid in the pipe if possible. Any ideas?

 

[Goahead]

Can you drill small test holes?
Can you flush the pipeline with water?
Can you cut the pipeline by non flame means?

http://www.welding-advisers.com/

 

[CodeRef]

UT Inspection with a trained examiner can detect water in piping?

 

[metengr]

Radiographic testing.