Industry Standard Class 250 Welding Neck Flanges

ProductsNominal Pipe Size Outside Diameter (O)Thickness (T)Raised Face Diameter (R)Length Thru Hub (Y)Base of Hub Diameter (X)Diameter of Hub at Bevel (A)Bore (B)Approximate Weight (lbs) Bolt Circle (C)Number of HolesDiameter of Bolt Holes
26250WNIS26 38.252.81 32.44 5.81 30.50 26.00 Specified by purchaser 530 34.50 281.88
28250WNIS28 40.75 2.94 34.94 5.94 33.00 28.00 Specified by purchaser 630 37.00 28 1.88
30250WNIS30 43.00 3.00 37.19 6.00 35.25 30.00 Specified by purchaser 700 39.2528 1.88
32250WNIS32 45.25 3.12 39.44 6.13 37.50 32.00Specified by purchaser 790 41.50 28 1.88
34250WNIS34 47.50 3.25 41.44 6.25 39.50 34.00Specified by purchaser 880 43.50 28 1.88
36250WNIS36 50.00 3.38 43.69 6.38 41.50 36.00 Specified by purchaser 970 46.00 32 2.13
38250WNIS38 52.25 3.44 45.69 6.44 43.50 38.00 Specified by purchaser 1050 48.00 32 2.13
40250WNIS40 54.50 3.56 47.94 6.5645.75 40.00 Specified by purchaser 1150 50.25 36 2.13
42250WNIS42 57.00 3.6950.44 6.94 47.75 42.00 Specified by purchaser 1325 52.75 36 2.13
44250WNIS44 59.253.75 52.69 7.00 49.75 44.00 Specified by purchaser 1425 55.00 36 2.13
46250WNIS46 61.50 3.88 54.94 7.13 51.75 46.00 Specified by purchaser 1525 57.25 40 2.13
48250WNIS48 65.00 4.00 58.44 7.25 54.0048.00 Specified by purchaser 1825 60.75 40 2.13