Water in Pipe-in-Pipe
I was recently asked if I knew of a method to determine if any water was present in the outer cylinder of a sub-sea pipe-in-pipe flowline. My answer was no. Hence my post.
I realize that it is a very broad question, and there likely is no practical answer.
The inner pipe is fully flooded.
Between the inner and outer pipe there are insulation material, waterstops and centralizers (i.e. no internal access).
Consider the area of concern (between the inner and outer pipe) as not fully flooded.
A measurement of the water that may be present is not required. Just a confirmation that there is water present or not.
Any thoughts or comments (or solutions!) would be greatly appreciated.