Size (NPS) Large End Small End End-to-end Nominal Pipe Size (NPS) End-to-end 26 x 24 660.4 609.6 609.6 40 x 38 1016.0 965.0 609.6 26 x 22 558.8 40 x 36 914.0 26 x 20 508.0 40 x 34 864.0 26 x 18 457.2 40 x 32 813.0 26 x 16 406.4 40 x 30 762.0 26 x 14 355.6 40 x 28 711.0