Pipe, perhaps, but it's going to be tough to comply with 340.24 in 90 degree plumbing fittings.
I would still like to challenge someone to assemble the tubing together and then try to push or pull the wire through it. They must have assembled it piece by piece and at the same time feeding the wire through each elbow one by one. I don?t think that fishing the wire as we know it be done was part of the program.