PAGE 27 BUTT WELDED FITTINGS (ASME B16.9) BUTT WELDED FITTINGS (ASME B16.9) 1 1 Nominal Pipe Size (NPS) Outside Diameter at Bevel D Centre - to - Centre O Back - to - Face K 1 ⁄2 0.840 3.00 1.875 3 ⁄4 1.050 2.25 1.6875 1 1.315 3.00 2.1875 11 ⁄4 1.660 3.75 2.75 11 ⁄2 1.900 4.50 3.25 2 2.375 6.00 4.1875 21 ⁄2 2.875 7.50 5.1875 3 3.500 9.00 6.25 31 ⁄2 4.000 10.50 7.25 4 4.500 12.00 8.25 5 5.563 15.00 10.3125 6 6.625 18.00 12.3125 8 8.625 24.00 16.3125 10 10.750 30.00 20.375 12 12.750 36.00 24.38 14 14.000 42.00 28.00 16 16.000 48.00 32.00 18 18.000 54.00 36.00 20 20.000 60.00 40.00 22 22.000 66.00 44.00 24 24.000 72.00 48.00 Nominal Pipe Size (NPS) Outside Diameter at Bevel D Centre - to - End Run C Outlet M 1 ⁄2 0.840 1.00 1.00 3 ⁄4 1.050 1.125 1.125 1 1.315 1.50 1.50 11 ⁄4 1.660 1.875 1.875 11 ⁄2 1.900 2.25 2.25 2 2.375 2.50 2.50 21 ⁄2 2.875 3.00 3.00 3 3.500 3.375 3.375 31 ⁄2 4.000 3.75 3.75 4 4.500 4.125 4.125 5 5.563 4.875 4.875 6 6.625 5.625 5.625 8 8.625 7.00 7.00 10 10.750 8.50 8.50 12 12.750 10.00 10.00 14 14.000 11.00 11.00 16 16.000 12.00 12.00 18 18.000 13.50 13.50 20 20.000 15.00 15.00 22 22.000 16.50 16.50 24 24.000 17.00 17.00 26 26.000 19.50 19.50 28 28.000 20.50 20.50 30 30.000 22.00 22.00 32 32.000 23.50 23.50 34 34.000 25.00 25.00 36 36.000 26.50 26.50 38 38.000 28.00 28.00 40 40.000 29.50 29.50 42 42.000 30.00 28.00 44 44.000 32.00 30.00 46 46.000 33.50 31.50 48 48.000 35.00 33.00 Note: Dimensions A is equal to one - half of dimensions O. *All dimensions are in inches 7 BUTT WELDED FITTINGS Long Radius Returns Straight Tees Straight Crosses K A A O M M M C C C C