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  • All dimensions are in inches.
  • 1/4" raised face will be added to the thickness 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

26900WNSA N/A 26 N/A 42.75 in N/A 5.50 in N/A 29.50 in N/A 11.25 in N/A 30.50 in N/A 0.44 in N/A 26.00 in N/A Specified by purchaser N/A 1525 lb N/A 37.50 in N/A 20 N/A 2.88 in
28900WNSA N/A 28 N/A 46.00 in N/A 5.62 in N/A 31.50 in N/A 11.75 in N/A 32.75 in N/A 0.50 in N/A 28.00 in N/A Specified by purchaser N/A 1810 lb N/A 40.25 in N/A 20 N/A 3.12 in
30900WNSA N/A 30 N/A 48.50 in N/A 5.88 in N/A 33.75 in N/A 12.25 in N/A 35.00 in N/A 0.50 in N/A 30.00 in N/A Specified by purchaser N/A 2120 lb N/A 42.75 in N/A 20 N/A 3.12 in
32900WNSA N/A 32 N/A 51.75 in N/A 6.25 in N/A 36.00 in N/A 13.00 in N/A 37.25 in N/A 0.50 in N/A 32.00 in N/A Specified by purchaser N/A 2545 lb N/A 45.50 in N/A 20 N/A 3.38 in
34900WNSA N/A 34 N/A 55.00 in N/A 6.50 in N/A 38.00 in N/A 13.75 in N/A 39.62 in N/A 0.56 in N/A 34.00 in N/A Specified by purchaser N/A 2970 lb N/A 48.25 in N/A 20 N/A 3.62 in
36900WNSA N/A 36 N/A 57.50 in N/A 6.75 in N/A 40.25 in N/A 14.25 in N/A 41.88 in N/A 0.56 in N/A 36.00 in N/A Specified by purchaser N/A 3395 lb N/A 50.75 in N/A 20 N/A 3.62 in
38900WNSA N/A 38 N/A 57.50 in N/A 7.50 in N/A 43.25 in N/A 13.88 in N/A 42.25 in N/A 0.75 in N/A 38.00 in N/A Specified by purchaser N/A 3385 lb N/A 50.75 in N/A 20 N/A 3.62 in
40900WNSA N/A 40 N/A 59.50 in N/A 7.75 in N/A 45.75 in N/A 14.31 in N/A 44.38 in N/A 0.81 in N/A 40.00 in N/A Specified by purchaser N/A 3620 lb N/A 52.75 in N/A 24 N/A 3.62 in
42900WNSA N/A 42 N/A 61.50 in N/A 8.12 in N/A 47.75 in N/A 14.62 in N/A 46.31 in N/A 0.81 in N/A 42.00 in N/A Specified by purchaser N/A 3960 lb N/A 54.75 in N/A 24 N/A 3.62 in
44900WNSA N/A 44 N/A 64.88 in N/A 8.44 in N/A 50.00 in N/A 15.38 in N/A 48.62 in N/A 0.88 in N/A 44.00 in N/A Specified by purchaser N/A 4300 lb N/A 57.62 in N/A 24 N/A 3.88 in
46900WNSA N/A 46 N/A 68.25 in N/A 8.88 in N/A 52.50 in N/A 16.18 in N/A 50.88 in N/A 0.88 in N/A 46.00 in N/A Specified by purchaser N/A 4640 lb N/A 60.50 in N/A 24 N/A 4.12 in
48900WNSA N/A 48 N/A 70.25 in N/A 9.19 in N/A 54.50 in N/A 16.50 in N/A 52.88 in N/A 0.94 in N/A 48.00 in N/A Specified by purchaser N/A 4980 lb N/A 62.50 in N/A 24 N/A 4.12 in
Unit of Measure
1