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  • All dimensions are in inches.
  • These flanges will be furnished with a 1/16" raised face unless otherwise specified.
  • Flat face option available.

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Industry Standard Welding Neck Flange
Unit of Measure
1 

Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Diameter of Hub at Bevel (A)

Base of Hub Diameter (X)

Bore (B)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Bolt Holes

26175WNIS N/A 26 N/A 31.50 in N/A 1.38 in N/A 29.00 in N/A 3.38 in N/A Specified by purchaser N/A 27.63 in N/A Specified by purchaser N/A 120 lb N/A 29.88 in N/A 28 N/A 0.88 in
28175WNIS N/A 28 N/A 33.50 in N/A 1.38 in N/A 31.00 in N/A 3.38 in N/A Specified by purchaser N/A 29.63 in N/A Specified by purchaser N/A 130 lb N/A 31.88 in N/A 28 N/A 0.88 in
30175WNIS N/A 30 N/A 35.75 in N/A 1.38 in N/A 33.25 in N/A 3.63 in N/A Specified by purchaser N/A 31.88 in N/A Specified by purchaser N/A 150 lb N/A 34.13 in N/A 36 N/A 0.88 in
32175WNIS N/A 32 N/A 37.75 in N/A 1.38 in N/A 35.25 in N/A 3.63 in N/A Specified by purchaser N/A 33.88 in N/A Specified by purchaser N/A 160 lb N/A 36.13 in N/A 36 N/A 0.88 in
34175WNIS N/A 34 N/A 40.25 in N/A 1.50 in N/A 37.38 in N/A 3.75 in N/A Specified by purchaser N/A 35.88 in N/A Specified by purchaser N/A 195 lb N/A 38.38 in N/A 36 N/A 1.00 in
36175WNIS N/A 36 N/A 42.25 in N/A 1.50 in N/A 39.38 in N/A 3.75 in N/A Specified by purchaser N/A 37.88 in N/A Specified by purchaser N/A 205 lb N/A 40.38 in N/A 36 N/A 1.00 in
38175WNIS N/A 38 N/A 44.25 in N/A 1.75 in N/A 41.38 in N/A 4.13 in N/A Specified by purchaser N/A 39.88 in N/A Specified by purchaser N/A 245 lb N/A 42.38 in N/A 36 N/A 1.00 in
40175WNIS N/A 40 N/A 46.25 in N/A 1.75 in N/A 43.38 in N/A 4.13 in N/A Specified by purchaser N/A 41.88 in N/A Specified by purchaser N/A 255 lb N/A 44.38 in N/A 40 N/A 1.00 in
42175WNIS N/A 42 N/A 49.00 in N/A 2.00 in N/A 45.75 in N/A 4.50 in N/A Specified by purchaser N/A 44.13 in N/A Specified by purchaser N/A 340 lb N/A 46.88 in N/A 40 N/A 1.13 in
44175WNIS N/A 44 N/A 51.00 in N/A 2.00 in N/A 47.75 in N/A 4.50 in N/A Specified by purchaser N/A 46.13 in N/A Specified by purchaser N/A 360 lb N/A 48.88 in N/A 40 N/A 1.13 in
46175WNIS N/A 46 N/A 53.00 in N/A 2.00 in N/A 49.75 in N/A 4.50 in N/A Specified by purchaser N/A 48.13 in N/A Specified by purchaser N/A 375 lb N/A 50.88 in N/A 40 N/A 1.13 in
48175WNIS N/A 48 N/A 55.00 in N/A 2.25 in N/A 51.75 in N/A 4.88 in N/A Specified by purchaser N/A 50.13 in N/A Specified by purchaser N/A 430 lb N/A 52.88 in N/A 44 N/A 1.13 in
50175WNIS N/A 50 N/A 57.00 in N/A 2.25 in N/A 53.75 in N/A 4.88 in N/A Specified by purchaser N/A 52.13 in N/A Specified by purchaser N/A 450 lb N/A 54.88 in N/A 44 N/A 1.13 in
52175WNIS N/A 52 N/A 59.50 in N/A 2.63 in N/A 56.00 in N/A 5.38 in N/A Specified by purchaser N/A 54.25 in N/A Specified by purchaser N/A 560 lb N/A 57.25 in N/A 44 N/A 1.25 in
54175WNIS N/A 54 N/A 61.50 in N/A 2.63 in N/A 58.00 in N/A 5.38 in N/A Specified by purchaser N/A 56.25 in N/A Specified by purchaser N/A 580 lb N/A 59.25 in N/A 44 N/A 1.25 in
60175WNIS N/A 60 N/A 67.50 in N/A 2.75 in N/A 64.00 in N/A 5.75 in N/A Specified by purchaser N/A 62.25 in N/A Specified by purchaser N/A 680 lb N/A 65.25 in N/A 48 N/A 1.25 in
66175WNIS N/A 66 N/A 73.50 in N/A 3.13 in N/A 70.00 in N/A 6.13 in N/A Specified by purchaser N/A 68.50 in N/A Specified by purchaser N/A 830 lb N/A 71.25 in N/A 56 N/A 1.25 in
72175WNIS N/A 72 N/A 80.00 in N/A 3.63 in N/A 76.50 in N/A 6.63 in N/A Specified by purchaser N/A 74.50 in N/A Specified by purchaser N/A 1075 lb N/A 77.75 in N/A 64 N/A 1.25 in
84175WNIS N/A 84 N/A 94.00 in N/A 3.00 in N/A 90.13 in N/A 7.00 in N/A Specified by purchaser N/A 88.00 in N/A Specified by purchaser N/A 1550 lb N/A 91.50 in N/A 72 N/A 1.38 in
96175WNIS N/A 96 N/A 106.00 in N/A 3.50 in N/A 102.13 in N/A 7.50 in N/A Specified by purchaser N/A 100.00 in N/A Specified by purchaser N/A 1950 lb N/A 103.50 in N/A 88 N/A 1.38 in
Unit of Measure
1