Pipe Flanges A.S.A. Schedule Pipe Sizes Hochdruckfl nsche 3 A.S.A. Schedule Pipe Sizes. Nominal Wall Thickness in mm Nominal Bore O.D.mm Schedule 10 20 30 STD& 40S 40 60 XS&80S 80 100 120 140 160 XXS 1/2" 10.3 1.73 1.73 2.41 2.41 1/4" 13.7 2.24 2.24 3.02 3.02 3/8" 17.1 2.31 2.31 3.20 3.20 1/2" 21.3 2.77 2.77 3.73 3.73 4.78 7.47 3/4" 26.7 2.87 2.87 3.91 3.91 5.56 7.82 1" 33.4 3.38 3.38 4.55 4.55 6.35 9.09 11/4" 42.2 3.56 3.56 4.85 4.85 6.35 9.07 11/2" 48.3 3.68 3.68 5.08 5.08 7.14 10.16 2" 60.3 3.91 3.91 5.54 5.54 8.74 11.07 21/2" 73.0 5.16 5.16 7.01 7.01 9.52 14.02 3" 88.9 5.49 5.49 7.62 7.62 11.13 15.24 31/2" 101.6 5.74 5.74 8.08 8.08 4" 114.3 6.02 6.02 8.56 8.58 11.13 13.49 17.12 5" 141.3 6.55 6.55 9.52 9.52 12.70 15.88 19.05 6" 168.3 7.11 7.11 10.97 10.97 14.27 18.26 21.95 8" 219.1 6.35 7.04 8.18 8.18 10.31 12.70 12.70 15.09 18.26 20.62 23.01 22.22 10" 273.0 6.35 7.80 9.27 9.27 12.70 12.70 15.09 18.26 21.44 25.40 28.58 25.40 12" 323.9 6.35 8.38 9.52 10.31 14.27 12.70 17.47 21.44 25.40 28.58 33.34 25.40 14" 355.6 6.35 7.92 9.52 9.52 11.13 15.09 12.70 19.05 23.82 27.79 31.75 35.71 16" 406.4 6.35 7.92 9.52 9.52 12.70 16.64 12.70 21.44 26.19 30.96 36.52 40.49 18" 457.2 6.35 7.92 11.13 9.52 14.27 19.05 12.70 23.82 29.36 34.92 39.69 45.24 20" 508.0 6.35 9.52 12.70 9.52 15.09 20.62 12.70 26.19 32.54 38.10 44.45 50.01 22" 558.8 6.35 9.52 12.70 9.52 15.88 22.22 12.70 28.58 34.92 41.28 47.62 53.98 24" 609.6 6.35 9.52 14.27 9.52 17.48 24.61 12.70 30.96 38.89 46.02 52.39 59.54 26" 660.4 7.92 12.70 9.52 12.70 28" 711.2 7.92 12.70 15.88 9.52 12.70 30" 762.8 7.92 12.70 15.88 9.52 12.70 32" 812.8 7.92 12.70 15.88 9.52 17.48 12.70 34" 863.6 7.92 12.70 15.88 9.52 17.48 12.70 36" 914.4 7.92 12.70 15.88 9.52 19.05 12.70
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