If you answered yes, than you should consider wearbacks for your elbows. For decades, Albina has supplied customers with bent elbows where we weld a plate or channel to the outside of the bend (acting as the wearback). A wearback is installed to act as an additional layer to the bend, when the backside of an elbow finally is worn through, any materials running in the piping system will remain inside and the piping system will continue to function due to the extra layer of material on the backside of the elbow. We recently bent some 8″ SCH80 T304L S/S SMLS to 30° elbows. After bending the elbows, we bent and fabricated wearbacks out of ½” stainless plate and welded the wearbacks to the outside of the pipe elbows.