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  • All dimensions are in inches.
  • 1/4" raised face will be added to the thickness and overall length unless otherwise specified.
  • 38" thru 48" sizes are the same as Series "A".
  • Flat face option available.

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ASME B16.47 Welding Neck Flange

ASME B16.47 Class 900 Series B Welding Neck Flanges

ASME B16.47 Welding Neck Flange

ASME B16.47 Class 900 Series B Welding Neck Flanges

ASME B16.47 Welding Neck Flange

ASME B16.47 Class 900 Series B Welding Neck Flanges

ASME B16.47 Welding Neck Flange

ASME B16.47 Class 900 Series B Welding Neck Flanges

ASME B16.47 Welding Neck Flange

ASME B16.47 Class 900 Series B Welding Neck Flanges
Flange Type N/A Welding Neck
Nominal Pipe Size N/A 26 N/A 28 N/A 30 N/A 32 N/A 34
Outside Diameter (O) N/A 40.25 in N/A 43.50 in N/A 46.50 in N/A 48.75 in N/A 51.75 in
Minimum Thickness (T) N/A 5.31 in N/A 5.81 in N/A 6.12 in N/A 6.31 in N/A 6.75 in
Raised Face Diameter (R) N/A 30.00 in N/A 32.25 in N/A 34.50 in N/A 36.50 in N/A 39.00 in
Length Thru Hub (Y) N/A 10.19 in N/A 10.88 in N/A 11.38 in N/A 11.94 in N/A 12.56 in
Hub Diameter (X) N/A 29.25 in N/A 31.38 in N/A 33.50 in N/A 35.75 in N/A 37.88 in
Minimum Fillet Radius (r) N/A 0.44 in N/A 0.50 in N/A 0.50 in N/A 0.50 in N/A 0.56 in
Top of Hub (A) N/A 26.00 in N/A 28.00 in N/A 30.00 in N/A 32.00 in N/A 34.00 in
Bore (B) N/A Specified by purchaser
Approximate Weight N/A 1050 lb N/A 1520 lb N/A 1820 lb N/A 2065 lb N/A 2450 lb
Bolt Circle (C) N/A 35.50 in N/A 38.25 in N/A 40.75 in N/A 43.00 in N/A 45.50 in
Number of Holes N/A 20
Diameter of Holes N/A 2.62 in N/A 2.88 in N/A 3.12 in N/A 3.12 in N/A 3.38 in