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  • All dimensions are in inches.
  • These flanges will be furnished with a 1/4" raised face unless otherwise specified.
  • Flat face option available.

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ANSI B16.5 Class 400 Weld Neck Flange
Unit of Measure
1 

Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Point of Weld (A)

Hub Diameter (X)

Bore (B)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Holes

0H2500WNAN N/A 1/2 N/A 5.25 in N/A 1.19 in N/A 1.38 in N/A 2.88 in N/A 0.84 in N/A 1.69 in N/A Specified by purchaser N/A 7 lb N/A 3.50 in N/A 4 N/A 0.88 in
3Q2500WNAN N/A 3/4 N/A 5.50 in N/A 1.25 in N/A 1.69 in N/A 3.13 in N/A 1.05 in N/A 2.00 in N/A Specified by purchaser N/A 8 lb N/A 3.75 in N/A 4 N/A 0.88 in
012500WNAN N/A 1 N/A 6.25 in N/A 1.38 in N/A 2.00 in N/A 3.50 in N/A 1.32 in N/A 2.25 in N/A Specified by purchaser N/A 12 lb N/A 4.25 in N/A 4 N/A 1.00 in
1Q2500WNAN N/A 1 1/4 N/A 7.25 in N/A 1.50 in N/A 2.50 in N/A 3.75 in N/A 1.66 in N/A 2.88 in N/A Specified by purchaser N/A 17 lb N/A 5.13 in N/A 4 N/A 1.13 in
1H2500WNAN N/A 1 1/2 N/A 8.00 in N/A 1.75 in N/A 2.88 in N/A 4.38 in N/A 1.90 in N/A 3.13 in N/A Specified by purchaser N/A 25 lb N/A 5.75 in N/A 4 N/A 1.25 in
022500WNAN N/A 2 N/A 9.25 in N/A 2.00 in N/A 3.63 in N/A 5.00 in N/A 2.38 in N/A 3.75 in N/A Specified by purchaser N/A 42 lb N/A 6.75 in N/A 8 N/A 1.13 in
2H2500WNAN N/A 2 1/2 N/A 10.50 in N/A 2.25 in N/A 4.13 in N/A 5.63 in N/A 2.88 in N/A 4.50 in N/A Specified by purchaser N/A 52 lb N/A 7.75 in N/A 8 N/A 1.25 in
032500WNAN N/A 3 N/A 12.00 in N/A 2.63 in N/A 5.00 in N/A 6.63 in N/A 3.50 in N/A 5.25 in N/A Specified by purchaser N/A 94 lb N/A 9.00 in N/A 8 N/A 1.38 in
042500WNAN N/A 4 N/A 14.00 in N/A 3.00 in N/A 6.19 in N/A 7.50 in N/A 4.50 in N/A 6.50 in N/A Specified by purchaser N/A 145 lb N/A 10.75 in N/A 8 N/A 1.63 in
052500WNAN N/A 5 N/A 16.50 in N/A 3.63 in N/A 7.31 in N/A 9.00 in N/A 5.56 in N/A 8.00 in N/A Specified by purchaser N/A 245 lb N/A 12.75 in N/A 8 N/A 1.88 in
062500WNAN N/A 6 N/A 19.00 in N/A 4.25 in N/A 8.50 in N/A 10.75 in N/A 6.63 in N/A 9.25 in N/A Specified by purchaser N/A 380 lb N/A 14.50 in N/A 8 N/A 2.13 in
082500WNAN N/A 8 N/A 21.75 in N/A 5.00 in N/A 10.63 in N/A 12.50 in N/A 8.63 in N/A 12.00 in N/A Specified by purchaser N/A 580 lb N/A 17.25 in N/A 12 N/A 2.13 in
102500WNAN N/A 10 N/A 26.50 in N/A 6.50 in N/A 12.75 in N/A 16.50 in N/A 10.75 in N/A 14.75 in N/A Specified by purchaser N/A 1075 lb N/A 21.25 in N/A 12 N/A 2.63 in
122500WNAN N/A 12 N/A 30.00 in N/A 7.25 in N/A 15.00 in N/A 18.25 in N/A 12.75 in N/A 17.38 in N/A Specified by purchaser N/A 1525 lb N/A 24.38 in N/A 12 N/A 2.88 in
Unit of Measure
1