how to make weldment tubing with bends a single member

I am having and issue with weldments and bends. I have multiple tubes that have bends in them but are need to be on single member not multiple so i can make a sheet to be sent out. I tired merge arc length and i thought making a spline would work but weldments and splines don't work. I don't know whats going on but i would really like some help to make the weldment tube with bends a single member. 

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