How to Unwrap Pipes through the mean-diameter?

Environment

Not environment-specific

Question:
How to Unwrap Pipes through the mean-diameter?

Answer:
Currently, there is no option to Unwrap the Pipes through the mean-diameter. You can use the following workaround:

Example: Pipe 150x10 , perimeter=471

Export the the unwrapped view made by tekla into DXF
Image
Calculate the perimeter when using the mean-diameter; mean-diameter=150-10=140, mean perimeter=3.14 x 140= 440
Calculate the scale factor by mean perimeter/original perimeter=440/471=0.93
Insert that DXF file into Tekla Structures drawing and use the scale factor:
Image