Industry Standard Class 350 Slip-On Flanges

Nominal Pipe SizeOutside Diameter (O)Thickness (T)Raised Face Diameter (R)Length Thru Hub (Y)Base of Hub Diameter (X)Bore (B)Approximate Weight (lbs)Bolt Circle (C)Number of HolesDiameter of Bolt Holes
2632.75 2.50 29.50 4.50 27.88 26.25 22530.63 28 1.13
28 34.75 2.50 31.50 4.50 29.88 28.25 250 32.63 28 1.13
30 37.00 2.63 33.75 4.75 32.13 30.25 295 34.8832 1.13
32 39.00 2.7535.75 5.0034.13 32.25 325 36.8836 1.13
34 41.00 2.88 37.75 5.1336.13 34.25355 38.8840 1.13
36 43.753.13 40.25 5.6338.50 36.25465 41.50 40 1.25
38 45.75 3.13 42.25 5.6340.50 38.25 490 43.5040 1.25
40 47.75 3.25 44.25 5.88 42.50 40.25 530 45.50 44 1.25
42 50.00 3.50 46.50 6.13 44.75 42.25 620 47.75 48 1.25
44 52.75 3.75 48.88 6.75 46.7544.2576050.25 44 1.38
46 54.75 4.25 50.88 7.25 48.75 46.25 880 52.25 48 1.38
48 56.75 4.25 52.88 7.25 50.75 48.25 920 54.2548 1.38
54 63.50 4.75 59.25 8.25 57.0054.251150 60.75 52 1.50
60 69.50 5.00 65.25 8.50 63.00 60.25 1450 66.7552 1.50