I understand your frustration. It seems that no one wants to make a ruling. I have just imported a truck that had been wrecked and it was like that. I finally just arrived at the border with all the receipts and paper that I could come up with and the fellow checked it through in no time.
I would suggest that if you want the pipes leave them on. If they fail, you will have to change them. if they don't , you got them. Good luck !!
Ter
