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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)

Base of Hub Diameter (X)

Diameter of Hub at Bevel (A)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Bolt Holes

26350WNIS N/A 26 N/A 32.75 in N/A 2.50 in N/A 29.50 in N/A 5.00 in N/A 27.88 in N/A Specified by purchaser N/A 245 lb N/A 30.63 in N/A 28 N/A 1.13 in
28350WNIS N/A 28 N/A 34.75 in N/A 2.50 in N/A 31.50 in N/A 5.00 in N/A 29.88 in N/A Specified by purchaser N/A 260 lb N/A 32.63 in N/A 28 N/A 1.13 in
30350WNIS N/A 30 N/A 37.00 in N/A 2.63 in N/A 33.75 in N/A 5.25 in N/A 32.13 in N/A Specified by purchaser N/A 305 lb N/A 34.88 in N/A 32 N/A 1.13 in
32350WNIS N/A 32 N/A 39.00 in N/A 2.75 in N/A 35.75 in N/A 5.50 in N/A 34.13 in N/A Specified by purchaser N/A 340 lb N/A 36.88 in N/A 36 N/A 1.13 in
34350WNIS N/A 34 N/A 41.00 in N/A 2.88 in N/A 37.75 in N/A 5.75 in N/A 36.13 in N/A Specified by purchaser N/A 375 lb N/A 38.88 in N/A 40 N/A 1.13 in
36350WNIS N/A 36 N/A 43.75 in N/A 3.13 in N/A 40.25 in N/A 6.13 in N/A 38.50 in N/A Specified by purchaser N/A 480 lb N/A 41.50 in N/A 40 N/A 1.25 in
38350WNIS N/A 38 N/A 45.75 in N/A 3.13 in N/A 42.25 in N/A 6.13 in N/A 40.50 in N/A Specified by purchaser N/A 510 lb N/A 43.50 in N/A 40 N/A 1.25 in
40350WNIS N/A 40 N/A 47.75 in N/A 3.25 in N/A 44.25 in N/A 6.25 in N/A 42.50 in N/A Specified by purchaser N/A 540 lb N/A 45.50 in N/A 44 N/A 1.25 in
42350WNIS N/A 42 N/A 50.00 in N/A 3.50 in N/A 46.50 in N/A 6.50 in N/A 44.75 in N/A Specified by purchaser N/A 640 lb N/A 47.75 in N/A 48 N/A 1.25 in
44350WNIS N/A 44 N/A 52.75 in N/A 3.75 in N/A 48.88 in N/A 6.75 in N/A 46.75 in N/A Specified by purchaser N/A 760 lb N/A 50.25 in N/A 44 N/A 1.38 in
46350WNIS N/A 46 N/A 54.75 in N/A 4.25 in N/A 50.88 in N/A 7.25 in N/A 48.75 in N/A Specified by purchaser N/A 880 lb N/A 52.25 in N/A 48 N/A 1.38 in
48350WNIS N/A 48 N/A 56.75 in N/A 4.25 in N/A 52.88 in N/A 7.25 in N/A 50.75 in N/A Specified by purchaser N/A 920 lb N/A 54.25 in N/A 48 N/A 1.38 in
52350WNIS N/A 52 N/A 61.50 in N/A 4.25 in N/A 57.25 in N/A 7.50 in N/A 55.00 in N/A Specified by purchaser N/A 1075 lb N/A 58.75 in N/A 52 N/A 1.50 in
54350WNIS N/A 54 N/A 63.50 in N/A 4.50 in N/A 59.25 in N/A 7.75 in N/A 57.00 in N/A Specified by purchaser N/A 1200 lb N/A 60.75 in N/A 52 N/A 1.50 in
60350WNIS N/A 60 N/A 69.50 in N/A 4.50 in N/A 65.25 in N/A 8.00 in N/A 63.00 in N/A Specified by purchaser N/A 1325 lb N/A 66.75 in N/A 60 N/A 1.50 in
66350WNIS N/A 66 N/A 77.00 in N/A 4.00 in N/A 72.38 in N/A 8.50 in N/A 70.00 in N/A Specified by purchaser N/A 1675 lb N/A 74.00 in N/A 60 N/A 1.63 in
72350WNIS N/A 72 N/A 83.00 in N/A 4.00 in N/A 78.38 in N/A 9.00 in N/A 76.00 in N/A Specified by purchaser N/A 1850 lb N/A 80.00 in N/A 72 N/A 1.63 in
84350WNIS N/A 84 N/A 96.50 in N/A 5.00 in N/A 91.25 in N/A 10.00 in N/A 89.00 in N/A Specified by purchaser N/A 2950 lb N/A 93.25 in N/A 80 N/A 1.75 in
96350WNIS N/A 96 N/A 109.25 in N/A 6.25 in N/A 103.88 in N/A 11.25 in N/A 101.25 in N/A Specified by purchaser N/A 4250 lb N/A 105.75 in N/A 84 N/A 1.88 in
Unit of Measure
1