Is this pc flat? If it is then offset the centerline in both directions then make the centerline a construction line and make sure the end vertexes are connected to the end lines then do a surface fill and thicken.
This is a 3D sketch. It is the centreline for a hose, that is placed on top of a gauge block to verify its length and shape. The bottom half of the hose surface needs to be cut with a 3-axis CNC.
The steps I was planning to take are as follows:
1. Extract the centreline of the hose.
2. Create ruled surface that runs parallel to bottom/top plane.
3. Extrude block.
4. Split the block with the ruled surface.
5. Sweep cut the cross section of the hose.
See attached image for end result using NX. The command that I find missing in SolidWorks seems to be Extract - Silhouette Curve.
Add your part above in an assembly - then insert new part, select the area that you need your new part and use offset surfaces and set at .000" - then use that profile to build your part...