Industry Standard Class 350 Welding Neck Flanges

ProductsNominal Pipe SizeOutside Diameter (O)Thickness (T)Raised Face Diameter (R)Length Thru Hub (Y)Base of Hub Diameter (X)Diameter of Hub at Bevel (A)Approximate Weight (lbs)Bolt Circle (C)Number of HolesDiameter of Bolt Holes
26350WNIS2632.75 2.50 29.50 5.00 27.88 Specified by purchaser 24530.63 28 1.13
28350WNIS2834.75 2.50 31.50 5.00 29.88 Specified by purchaser 260 32.6328 1.13
30350WNIS3037.00 2.63 33.75 5.2532.13 Specified by purchaser 305 34.88 32 1.13
32350WNIS3239.002.75 35.75 5.5034.13 Specified by purchaser 340 36.88 36 1.13
34350WNIS3441.00 2.88 37.75 5.75 36.13 Specified by purchaser 375 38.88 40 1.13
36350WNIS3643.75 3.13 40.25 6.13 38.50 Specified by purchaser 480 41.50 40 1.25
38350WNIS3845.75 3.13 42.25 6.1340.50 Specified by purchaser 51043.5040 1.25
40350WNIS4047.75 3.25 44.25 6.25 42.50 Specified by purchaser 540 45.50441.25
42350WNIS42 50.00 3.50 46.50 6.50 44.75 Specified by purchaser 64047.75 48 1.25
44350WNIS44 52.75 3.75 48.88 6.75 46.75 Specified by purchaser 760 50.25441.38
46350WNIS46 54.75 4.25 50.88 7.25 48.75Specified by purchaser 880 52.25 48 1.38
48350WNIS48 56.75 4.25 52.88 7.25 50.75Specified by purchaser 920 54.25 48 1.38
52350WNIS52 61.50 4.25 57.25 7.50 55.00 Specified by purchaser 107558.75 52 1.50
54350WNIS54 63.50 4.50 59.257.75 57.00 Specified by purchaser 1200 60.75 52 1.50
60350WNIS60 69.50 4.50 65.258.00 63.00 Specified by purchaser 1325 66.75 60 1.50
66350WNIS66 77.00 4.00 72.38 8.50 70.00 Specified by purchaser 1675 74.00 60 1.63
72350WNIS72 83.00 4.00 78.38 9.00 76.00 Specified by purchaser 1850 80.00 72 1.63
84350WNIS84 96.50 5.00 91.25 10.00 89.00 Specified by purchaser 2950 93.25 80 1.75
96350WNIS96 109.25 6.25103.88 11.25101.25 Specified by purchaser 4250 105.7584 1.88