• ASME B16.47 Welding Neck Flange
  • All ASME B16.47 CLASS 150# SERIES "A" weld neck flange dimensions are in inches.
  • These ASME B16.47 CLASS 150# SERIES "A" weld neck flanges will be supplied with a 1/16" raised face unless otherwise specified.
  • Flat face option available for ASME B16.47 CLASS 150# SERIES "A" weld neck flanges.
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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 34.25 N/A 2.69 N/A 29.50 N/A 4.75 N/A 26.62 N/A 0.38 N/A 26.00 N/A Specified by purchaser N/A 300 N/A 31.75 N/A 24 N/A 1.38
N/A 28 N/A 36.50 N/A 2.81 N/A 31.50 N/A 4.94 N/A 28.62 N/A 0.44 N/A 28.00 N/A Specified by purchaser N/A 345 N/A 34.00 N/A 28 N/A 1.38
N/A 30 N/A 38.75 N/A 2.94 N/A 33.75 N/A 5.38 N/A 30.75 N/A 0.44 N/A 30.00 N/A Specified by purchaser N/A 400 N/A 36.00 N/A 28 N/A 1.38
N/A 32 N/A 41.75 N/A 3.19 N/A 36.00 N/A 5.69 N/A 32.75 N/A 0.44 N/A 32.00 N/A Specified by purchaser N/A 505 N/A 38.50 N/A 28 N/A 1.62
N/A 34 N/A 43.75 N/A 3.25 N/A 38.00 N/A 5.88 N/A 34.75 N/A 0.50 N/A 34.00 N/A Specified by purchaser N/A 540 N/A 40.50 N/A 32 N/A 1.62
N/A 36 N/A 46.00 N/A 3.56 N/A 40.25 N/A 6.19 N/A 36.75 N/A 0.50 N/A 36.00 N/A Specified by purchaser N/A 640 N/A 42.75 N/A 32 N/A 1.62
N/A 38 N/A 48.75 N/A 3.44 N/A 42.25 N/A 6.19 N/A 39.00 N/A 0.50 N/A 38.00 N/A Specified by purchaser N/A 720 N/A 45.25 N/A 32 N/A 1.62
N/A 40 N/A 50.75 N/A 3.56 N/A 44.25 N/A 6.44 N/A 41.00 N/A 0.50 N/A 40.00 N/A Specified by purchaser N/A 775 N/A 47.25 N/A 36 N/A 1.62
N/A 42 N/A 53.00 N/A 3.81 N/A 47.00 N/A 6.75 N/A 43.00 N/A 0.50 N/A 42.00 N/A Specified by purchaser N/A 890 N/A 49.50 N/A 36 N/A 1.62
N/A 44 N/A 55.25 N/A 4.00 N/A 49.00 N/A 7.00 N/A 45.00 N/A 0.50 N/A 44.00 N/A Specified by purchaser N/A 990 N/A 51.75 N/A 40 N/A 1.62
N/A 46 N/A 57.25 N/A 4.06 N/A 51.00 N/A 7.31 N/A 47.12 N/A 0.50 N/A 46.00 N/A Specified by purchaser N/A 1060 N/A 53.75 N/A 40 N/A 1.62
N/A 48 N/A 59.50 N/A 4.25 N/A 53.50 N/A 7.56 N/A 49.12 N/A 0.50 N/A 48.00 N/A Specified by purchaser N/A 1185 N/A 56.00 N/A 44 N/A 1.62
N/A 50 N/A 61.75 N/A 4.38 N/A 55.50 N/A 8.00 N/A 51.25 N/A 0.50 N/A 50.00 N/A Specified by purchaser N/A 1270 N/A 58.25 N/A 44 N/A 1.88
N/A 52 N/A 64.00 N/A 4.56 N/A 57.50 N/A 8.25 N/A 53.25 N/A 0.50 N/A 52.00 N/A Specified by purchaser N/A 1410 N/A 60.50 N/A 44 N/A 1.88
N/A 54 N/A 66.25 N/A 4.75 N/A 59.50 N/A 8.50 N/A 55.25 N/A 0.50 N/A 54.00 N/A Specified by purchaser N/A 1585 N/A 62.75 N/A 44 N/A 1.88
N/A 56 N/A 68.75 N/A 4.88 N/A 62.00 N/A 9.00 N/A 57.38 N/A 0.50 N/A 56.00 N/A Specified by purchaser N/A 1760 N/A 65.00 N/A 48 N/A 1.88
N/A 58 N/A 71.00 N/A 5.06 N/A 64.00 N/A 9.25 N/A 59.38 N/A 0.50 N/A 58.00 N/A Specified by purchaser N/A 1915 N/A 67.25 N/A 48 N/A 1.88
N/A 60 N/A 73.00 N/A 5.19 N/A 66.00 N/A 9.44 N/A 61.38 N/A 0.50 N/A 60.00 N/A Specified by purchaser N/A 2045 N/A 69.25 N/A 52 N/A 1.88
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