W = Length of Wire
D = Diameter of Pipe
L = Length of Pipe (and wire coil)
T = Thickness of Wire
∏ = pi
W = ∏(D+T/2)(L/T)
This should give you what you need under ideal situations
The length of the wire is equal to the length of one loop of wire around the tube, ∏(D+T/2), times the number of...