Recent content by discover66

On failure there is no pressure change. they are not in pressure isolation. The coil will get cut. :)

Unfortunately the tubes are at the same pressure. The inner tube has abrasive multiphase fluid and is pressure balanced with the outer pipe.

A little more detail of the problem. The pipe has an inner pipe inside it that is carrying high pressure fluid. The high pressure fluid will corrode / erode the inner pipe and eventually break through to the outer pipe. What I want to do is wrap a coil around the inner pipe (ferrous steel) so...

I considered stray field transformer, but I don't have access to the inner coil. The position of the inner coil isn't important, it's integrity is. I need to know if the inner coil fails.

I cannot connect any electronics to the inner coil. I was thinking of inducing a current in the coil and detecting the field with the second coil. But as this is inside a steel pipe, can I do that?

Just sitting there. Once installed there is no physical access. What I really want to know is if the coil loses integrity.

Coil can have as many turns as necessary and the ends of the wire connected, i.e. LC circuit.

The inner coil is not connected to anything except itself.

Just some idle Sunday musings. I have a steel pipe that is 2" ID, 2.5" OD, 10' long. I want to place a coil inside the pipe midpoint along the pipe and detect it's presence with a transmitter / receiver array. The array can consist of two coils wrapped around the outside of the pipe and can be...