In LW, Rail Extrude will do the job nicely.
1. In one layer, use the Sketch tool to draw a 'bendy' path.
2. In another layer draw a 2-dimensional disk (or any 2d shape really) and align it with the beginning of the path you drew on the first layer. Make sure it is sitting like a cap at the start of the path (it doesnt matter if it overlaps a little). For narrow pipes, reduce the number of sides to a sensible minimum. Note, I said 'start' of the path, it wont work if its on the wrong end.
3. Then make sure the path is in a bg layer, the 2d shape is in the fg layer, and press Rail Extrude. You will get a dialog box with options -- you can experiement with diff settings yourself, but importantly make sure you tick Orient to Path for best results.
4. Once thats done, delete the path layer and there's your pipe, cable, spaghetti, wire, etc.
HTH
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