you could try to first save a copy of the pipe where you want it to be, then do a Replace>Layout in the assembly.
Or you can move the copied part from the old part folder to your working directory afterward with Windows Explorer.
I'm working with libraries with a search path.
If I'm copying my parts to the working directory it is no use to work with libraries.
I think I have misunderstood your issue...
But with this technique you can save your pipe wherever you want...