I have the nomograph in front of me right now. Using pencil and the ruler for OD 6" and dL = 36" I draw the straight line to match bend length L2 = 90 ft = 27. 4 m (approximation).
But as suggested by Jop you can generate 2 exp. loop for example with size L2 = 13.7...etc, then you have two closed system separated by three anchor point (assume straight line here).
4. Our client has standard long pipe support so it won't fall off the beam.
yes I agree, check if the displacement report convinces you that your pipe doesn't fall from the support/beam. There is a documented accident regards to this mistake by not checking Diplc. report or may be no stress analysis done for such line.