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

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ASME B16.47 Welding Neck Flange
Unit of Measure
1 

Item #

Nominal Pipe Size

Outside Diameter (O)

Minimum Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Hub Diameter (X)

Minimum Fillet Radius (r)

Top of Hub (A)

Bore (B)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Holes

2675WNSB N/A 26 N/A 30.00 in N/A 1.31 in N/A 27.75 in N/A 2.31 in N/A 26.62 in N/A 0.31 in N/A 26.06 in N/A Specified by purchaser N/A 80 lb N/A 28.50 in N/A 36 N/A 0.75 in
2875WNSB N/A 28 N/A 32.00 in N/A 1.31 in N/A 29.75 in N/A 2.44 in N/A 28.62 in N/A 0.31 in N/A 28.06 in N/A Specified by purchaser N/A 85 lb N/A 30.50 in N/A 40 N/A 0.75 in
3075WNSB N/A 30 N/A 34.00 in N/A 1.31 in N/A 31.75 in N/A 2.56 in N/A 30.62 in N/A 0.31 in N/A 30.06 in N/A Specified by purchaser N/A 90 lb N/A 32.50 in N/A 44 N/A 0.75 in
3275WNSB N/A 32 N/A 36.00 in N/A 1.38 in N/A 33.75 in N/A 2.75 in N/A 32.62 in N/A 0.31 in N/A 32.06 in N/A Specified by purchaser N/A 105 lb N/A 34.50 in N/A 48 N/A 0.75 in
3475WNSB N/A 34 N/A 38.00 in N/A 1.38 in N/A 35.75 in N/A 2.88 in N/A 34.62 in N/A 0.31 in N/A 34.06 in N/A Specified by purchaser N/A 110 lb N/A 36.50 in N/A 52 N/A 0.75 in
3675WNSB N/A 36 N/A 40.69 in N/A 1.44 in N/A 38.00 in N/A 3.38 in N/A 36.81 in N/A 0.38 in N/A 36.06 in N/A Specified by purchaser N/A 145 lb N/A 39.06 in N/A 40 N/A 0.88 in
3875WNSB N/A 38 N/A 42.69 in N/A 1.50 in N/A 40.00 in N/A 3.50 in N/A 38.81 in N/A 0.38 in N/A 38.06 in N/A Specified by purchaser N/A 160 lb N/A 41.06 in N/A 40 N/A 0.88 in
4075WNSB N/A 40 N/A 44.69 in N/A 1.50 in N/A 42.00 in N/A 3.62 in N/A 40.81 in N/A 0.38 in N/A 40.06 in N/A Specified by purchaser N/A 170 lb N/A 43.06 in N/A 44 N/A 0.88 in
4275WNSB N/A 42 N/A 46.69 in N/A 1.56 in N/A 44.00 in N/A 3.75 in N/A 42.81 in N/A 0.38 in N/A 42.06 in N/A Specified by purchaser N/A 185 lb N/A 45.06 in N/A 48 N/A 0.88 in
4475WNSB N/A 44 N/A 49.25 in N/A 1.69 in N/A 46.25 in N/A 4.12 in N/A 44.88 in N/A 0.38 in N/A 44.06 in N/A Specified by purchaser N/A 230 lb N/A 47.38 in N/A 36 N/A 1.00 in
4675WNSB N/A 46 N/A 51.25 in N/A 1.75 in N/A 48.25 in N/A 4.25 in N/A 46.88 in N/A 0.38 in N/A 46.06 in N/A Specified by purchaser N/A 245 lb N/A 49.38 in N/A 40 N/A 1.00 in
4875WNSB N/A 48 N/A 53.25 in N/A 1.81 in N/A 50.25 in N/A 4.38 in N/A 48.88 in N/A 0.38 in N/A 48.06 in N/A Specified by purchaser N/A 270 lb N/A 51.38 in N/A 44 N/A 1.00 in
5075WNSB N/A 50 N/A 55.25 in N/A 1.88 in N/A 52.25 in N/A 4.56 in N/A 50.94 in N/A 0.38 in N/A 50.06 in N/A Specified by purchaser N/A 290 lb N/A 53.38 in N/A 44 N/A 1.00 in
5275WNSB N/A 52 N/A 57.38 in N/A 1.88 in N/A 54.25 in N/A 4.75 in N/A 52.94 in N/A 0.38 in N/A 52.06 in N/A Specified by purchaser N/A 310 lb N/A 55.50 in N/A 48 N/A 1.00 in
5475WNSB N/A 54 N/A 59.38 in N/A 1.94 in N/A 56.25 in N/A 4.94 in N/A 55.00 in N/A 0.38 in N/A 54.06 in N/A Specified by purchaser N/A 340 lb N/A 57.50 in N/A 48 N/A 1.00 in
5675WNSB N/A 56 N/A 62.00 in N/A 2.00 in N/A 58.50 in N/A 5.31 in N/A 57.12 in N/A 0.44 in N/A 56.06 in N/A Specified by purchaser N/A 400 lb N/A 59.88 in N/A 40 N/A 1.12 in
5875WNSB N/A 58 N/A 64.00 in N/A 2.06 in N/A 60.50 in N/A 5.44 in N/A 59.12 in N/A 0.44 in N/A 58.06 in N/A Specified by purchaser N/A 430 lb N/A 61.88 in N/A 44 N/A 1.12 in
6075WNSB N/A 60 N/A 66.00 in N/A 2.19 in N/A 62.50 in N/A 5.69 in N/A 61.12 in N/A 0.44 in N/A 60.06 in N/A Specified by purchaser N/A 475 lb N/A 63.88 in N/A 44 N/A 1.12 in
Unit of Measure
1