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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
Items ASME B16.47 Welding Neck Flange
2675WNSB
ASME B16.47 Class 75 Series B Welding Neck Flanges
ASME B16.47 Welding Neck Flange
2875WNSB
ASME B16.47 Class 75 Series B Welding Neck Flanges
ASME B16.47 Welding Neck Flange
3075WNSB
ASME B16.47 Class 75 Series B Welding Neck Flanges
ASME B16.47 Welding Neck Flange
3275WNSB
ASME B16.47 Class 75 Series B Welding Neck Flanges
ASME B16.47 Welding Neck Flange
3475WNSB
ASME B16.47 Class 75 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 30.00 in N/A 32.00 in N/A 34.00 in N/A 36.00 in N/A 38.00 in
Minimum Thickness (T) N/A 1.31 in N/A 1.31 in N/A 1.31 in N/A 1.38 in N/A 1.38 in
Raised Face Diameter (R) N/A 27.75 in N/A 29.75 in N/A 31.75 in N/A 33.75 in N/A 35.75 in
Length Thru Hub (Y) N/A 2.31 in N/A 2.44 in N/A 2.56 in N/A 2.75 in N/A 2.88 in
Hub Diameter (X) N/A 26.62 in N/A 28.62 in N/A 30.62 in N/A 32.62 in N/A 34.62 in
Minimum Fillet Radius (r) N/A 0.31 in
Top of Hub (A) N/A 26.06 in N/A 28.06 in N/A 30.06 in N/A 32.06 in N/A 34.06 in
Bore (B) N/A Specified by purchaser
Approximate Weight N/A 80 lb N/A 85 lb N/A 90 lb N/A 105 lb N/A 110 lb
Bolt Circle (C) N/A 28.50 in N/A 30.50 in N/A 32.50 in N/A 34.50 in N/A 36.50 in
Number of Holes N/A 36 N/A 40 N/A 44 N/A 48 N/A 52
Diameter of Holes N/A 0.75 in