This sounds like a confusion between tubing and piping.
In 'the old days' SE only had tubing in ExpressRoute, where all runs were continuous bent tube.
Piping has now been added where the runs are made up of pieces of pipe with welded fittings etc.
Looking at V17 there are 2 command icons.
One looks like a piece of bent copper copper tube - this will create your bends etc.
The other looks like 2 piecs of steel pipe with 90deg elbow.
Try using the first one.
bc.