• ASME B16.47 Welding Neck Flange
  • All dimensions are in inches.
  • 1/4" raised face will be added to the thickness and overall length unless otherwise specified.
  • Flat face option available.
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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 (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

N/A 26 N/A 40.00 N/A 4.25 N/A 29.50 N/A 8.75 N/A 29.44 N/A 0.50 N/A 26.00 N/A Specified by purchaser N/A 940 N/A 36.00 N/A 28 N/A 2.00
N/A 28 N/A 42.25 N/A 4.38 N/A 31.50 N/A 9.25 N/A 31.62 N/A 0.50 N/A 28.00 N/A Specified by purchaser N/A 1060 N/A 38.00 N/A 28 N/A 2.12
N/A 30 N/A 44.50 N/A 4.50 N/A 33.75 N/A 9.75 N/A 33.94 N/A 0.50 N/A 30.00 N/A Specified by purchaser N/A 1210 N/A 40.25 N/A 28 N/A 2.12
N/A 32 N/A 47.00 N/A 4.62 N/A 36.00 N/A 10.25 N/A 36.12 N/A 0.50 N/A 32.00 N/A Specified by purchaser N/A 1375 N/A 42.50 N/A 28 N/A 2.38
N/A 34 N/A 49.00 N/A 4.75 N/A 38.00 N/A 10.62 N/A 38.31 N/A 0.56 N/A 34.00 N/A Specified by purchaser N/A 1540 N/A 44.50 N/A 28 N/A 2.38
N/A 36 N/A 51.75 N/A 4.88 N/A 40.25 N/A 11.12 N/A 40.62 N/A 0.56 N/A 36.00 N/A Specified by purchaser N/A 1705 N/A 47.00 N/A 28 N/A 2.62
N/A 38 N/A 50.00 N/A 6.00 N/A 41.50 N/A 10.00 N/A 40.25 N/A 0.56 N/A 38.00 N/A Specified by purchaser N/A 1470 N/A 45.75 N/A 28 N/A 2.38
N/A 40 N/A 52.00 N/A 6.25 N/A 43.75 N/A 10.38 N/A 42.25 N/A 0.56 N/A 40.00 N/A Specified by purchaser N/A 1630 N/A 47.75 N/A 32 N/A 2.38
N/A 42 N/A 55.25 N/A 6.62 N/A 46.00 N/A 11.00 N/A 44.38 N/A 0.56 N/A 42.00 N/A Specified by purchaser N/A 2030 N/A 50.50 N/A 28 N/A 2.62
N/A 44 N/A 57.25 N/A 6.81 N/A 48.25 N/A 11.38 N/A 46.50 N/A 0.56 N/A 44.00 N/A Specified by purchaser N/A 2160 N/A 52.50 N/A 32 N/A 2.62
N/A 46 N/A 59.50 N/A 7.06 N/A 50.25 N/A 11.81 N/A 48.62 N/A 0.56 N/A 46.00 N/A Specified by purchaser N/A 2410 N/A 54.75 N/A 32 N/A 2.62
N/A 48 N/A 62.75 N/A 7.44 N/A 52.50 N/A 12.44 N/A 50.75 N/A 0.56 N/A 48.00 N/A Specified by purchaser N/A 2855 N/A 57.50 N/A 32 N/A 2.88
N/A 50 N/A 65.75 N/A 7.75 N/A 54.50 N/A 12.94 N/A 52.88 N/A 0.56 N/A 50.00 N/A Specified by purchaser N/A 3330 N/A 60.00 N/A 28 N/A 3.12
N/A 52 N/A 67.75 N/A 8.00 N/A 56.50 N/A 13.25 N/A 54.88 N/A 0.56 N/A 52.00 N/A Specified by purchaser N/A 3560 N/A 62.00 N/A 32 N/A 3.12
N/A 54 N/A 70.00 N/A 8.25 N/A 58.75 N/A 13.75 N/A 57.00 N/A 0.56 N/A 54.00 N/A Specified by purchaser N/A 3920 N/A 64.25 N/A 32 N/A 3.12
N/A 56 N/A 73.00 N/A 8.56 N/A 60.75 N/A 14.25 N/A 59.12 N/A 0.62 N/A 56.00 N/A Specified by purchaser N/A 4280 N/A 66.75 N/A 32 N/A 3.38
N/A 58 N/A 75.00 N/A 8.75 N/A 63.00 N/A 14.56 N/A 61.12 N/A 0.62 N/A 58.00 N/A Specified by purchaser N/A 4640 N/A 68.75 N/A 32 N/A 3.38
N/A 60 N/A 78.50 N/A 9.19 N/A 65.25 N/A 15.31 N/A 63.38 N/A 0.69 N/A 60.00 N/A Specified by purchaser N/A 5000 N/A 71.75 N/A 28 N/A 3.62
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