Pipe standards and companies use straight centerlines in 1-line, 2-line, model, and plan displays to accurately represent the location of the intersection of an elbow. Pipe designs typically determine the centerline path. Wastewater piping contractors and fabricators use straight centerlines to guarantee accuracy in process piping installations and fabrication drawings.
The centerline display of elbows in AutoCAD MEP 2022 toolset is based on the path and orientation of connectors 1 and 2 on the elbow. The centerline display typically follows the path of the curve and is generated in all orthographic and model views.
The following example shows a straight centerline of elbows on a pipe in 2-line display. One elbow is 45 degrees and the other is 90 degrees.
Straight centerline on pipe in 2-line display