So here’s pretty basic stack of modifiers:
We have screw modifer to make a spiral, when use curve modifier to guide it, and when turn it to “pipe” with desired shape with Z-Up enabled:
It mostly work, but create a wierd twists:
Im not really sure why such twists are even happening?
Hmm… maybe your curve is just too curvy ? I assume you do not want the size deformation when using only this…
…so maybe you show the full GN setup ?
Edit: I just noticed… you may check in the screw modifier the calclulate order option
Yepp… i was teasing the OP a bit 
to show the GN so far…
…but of course you nailed it 
