Calculate spacing between pipes on a pipe rack based on Dimensional Standard ASME B16.5 and B16.47. 1. Pipe Outside Diameters as per ANSI ASME B36.10. 2. Flange OD upto 24 inch as per ANSI ASME B16.5. 3. Flange OD from 26″ as per ASME B16.47 Type A. 4. Clear gap can be changed as per your company standard by going to Settings Menu. 5. Multiple flange scenarios can be selected from Settings Menu.