If you know the geometry you can figure out the radius of curvature for the pipe, roped bends have a very large radius. From there statics textbook will give formula for bending stress, this can be manually added to the Caesar calculated stresses, keeping in mind roped vertical bends will create max bending stresses at 12 and 6 o'clock, while bending stresses in a flat layout with horizontal changes in direction max at 3 and 9 o'clock positions.