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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)

Bore (B)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Bolt Holes

26250WNIS N/A 26 N/A 38.25 in N/A 2.81 in N/A 32.44 in N/A 5.81 in N/A 30.50 in N/A N/A Specified by purchaser N/A 530 lb N/A 34.50 in N/A 28 N/A 1.88 in
28250WNIS N/A 28 N/A 40.75 in N/A 2.94 in N/A 34.94 in N/A 5.94 in N/A 33.00 in N/A N/A Specified by purchaser N/A 630 lb N/A 37.00 in N/A 28 N/A 1.88 in
30250WNIS N/A 30 N/A 43.00 in N/A 3.00 in N/A 37.19 in N/A 6.00 in N/A 35.25 in N/A N/A Specified by purchaser N/A 700 lb N/A 39.25 in N/A 28 N/A 1.88 in
32250WNIS N/A 32 N/A 45.25 in N/A 3.12 in N/A 39.44 in N/A 6.13 in N/A 37.50 in N/A N/A Specified by purchaser N/A 790 lb N/A 41.50 in N/A 28 N/A 1.88 in
34250WNIS N/A 34 N/A 47.50 in N/A 3.25 in N/A 41.44 in N/A 6.25 in N/A 39.50 in N/A N/A Specified by purchaser N/A 880 lb N/A 43.50 in N/A 28 N/A 1.88 in
36250WNIS N/A 36 N/A 50.00 in N/A 3.38 in N/A 43.69 in N/A 6.38 in N/A 41.50 in N/A N/A Specified by purchaser N/A 970 lb N/A 46.00 in N/A 32 N/A 2.13 in
38250WNIS N/A 38 N/A 52.25 in N/A 3.44 in N/A 45.69 in N/A 6.44 in N/A 43.50 in N/A N/A Specified by purchaser N/A 1050 lb N/A 48.00 in N/A 32 N/A 2.13 in
40250WNIS N/A 40 N/A 54.50 in N/A 3.56 in N/A 47.94 in N/A 6.56 in N/A 45.75 in N/A N/A Specified by purchaser N/A 1150 lb N/A 50.25 in N/A 36 N/A 2.13 in
42250WNIS N/A 42 N/A 57.00 in N/A 3.69 in N/A 50.44 in N/A 6.94 in N/A 47.75 in N/A N/A Specified by purchaser N/A 1325 lb N/A 52.75 in N/A 36 N/A 2.13 in
44250WNIS N/A 44 N/A 59.25 in N/A 3.75 in N/A 52.69 in N/A 7.00 in N/A 49.75 in N/A N/A Specified by purchaser N/A 1425 lb N/A 55.00 in N/A 36 N/A 2.13 in
46250WNIS N/A 46 N/A 61.50 in N/A 3.88 in N/A 54.94 in N/A 7.13 in N/A 51.75 in N/A N/A Specified by purchaser N/A 1525 lb N/A 57.25 in N/A 40 N/A 2.13 in
48250WNIS N/A 48 N/A 65.00 in N/A 4.00 in N/A 58.44 in N/A 7.25 in N/A 54.00 in N/A N/A Specified by purchaser N/A 1825 lb N/A 60.75 in N/A 40 N/A 2.13 in
Unit of Measure
1