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  • All dimensions are in inches.
  • These flanges will be furnished with a 1/16" raised face unless otherwise specified.
  • Flat face option available.
  • Standard Bore will be furnished unless otherwise specified.

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ANSI 150 Welding 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

0H300WNAN N/A 1/2 N/A 3.75 in N/A 0.56 in N/A 1.38 in N/A 2.06 in N/A 0.84 in N/A 1.50 in N/A 0.62 in N/A 2 lb N/A 2.63 in N/A 4 N/A 0.63 in
3Q300WNAN N/A 3/4 N/A 4.63 in N/A 0.63 in N/A 1.69 in N/A 2.25 in N/A 1.05 in N/A 1.88 in N/A 0.82 in N/A 3 lb N/A 3.25 in N/A 4 N/A 0.75 in
01300WNAN N/A 1 N/A 4.88 in N/A 0.69 in N/A 2.00 in N/A 2.44 in N/A 1.32 in N/A 2.13 in N/A 1.05 in N/A 4 lb N/A 3.50 in N/A 4 N/A 0.75 in
1Q300WNAN N/A 1 1/4 N/A 5.25 in N/A 0.75 in N/A 2.50 in N/A 2.56 in N/A 1.66 in N/A 2.50 in N/A 1.38 in N/A 5 lb N/A 3.88 in N/A 4 N/A 0.75 in
1H300WNAN N/A 1 1/2 N/A 6.13 in N/A 0.81 in N/A 2.88 in N/A 2.69 in N/A 1.90 in N/A 2.75 in N/A 1.61 in N/A 7 lb N/A 4.50 in N/A 4 N/A 0.88 in
02300WNAN N/A 2 N/A 6.50 in N/A 0.88 in N/A 3.63 in N/A 2.75 in N/A 2.38 in N/A 3.31 in N/A 2.07 in N/A 9 lb N/A 5.00 in N/A 8 N/A 0.75 in
2H300WNAN N/A 2 1/2 N/A 7.50 in N/A 1.00 in N/A 4.13 in N/A 3.00 in N/A 2.88 in N/A 3.94 in N/A 2.47 in N/A 12 lb N/A 5.88 in N/A 8 N/A 0.88 in
03300WNAN N/A 3 N/A 8.25 in N/A 1.13 in N/A 5.00 in N/A 3.13 in N/A 3.50 in N/A 4.63 in N/A 3.07 in N/A 15 lb N/A 6.63 in N/A 8 N/A 0.88 in
3H300WNAN N/A 3 1/2 N/A 9.00 in N/A 1.19 in N/A 5.50 in N/A 3.19 in N/A 4.00 in N/A 5.25 in N/A 3.55 in N/A 18 lb N/A 7.25 in N/A 8 N/A 0.88 in
04300WNAN N/A 4 N/A 10.00 in N/A 1.25 in N/A 6.19 in N/A 3.38 in N/A 4.50 in N/A 5.75 in N/A 4.03 in N/A 25 lb N/A 7.88 in N/A 8 N/A 0.88 in
05300WNAN N/A 5 N/A 11.00 in N/A 1.38 in N/A 7.31 in N/A 3.88 in N/A 5.56 in N/A 7.00 in N/A 5.05 in N/A 32 lb N/A 9.25 in N/A 8 N/A 0.88 in
06300WNAN N/A 6 N/A 12.50 in N/A 1.44 in N/A 8.50 in N/A 3.88 in N/A 6.63 in N/A 8.13 in N/A 6.07 in N/A 42 lb N/A 10.63 in N/A 12 N/A 0.88 in
08300WNAN N/A 8 N/A 15.00 in N/A 1.63 in N/A 10.63 in N/A 4.38 in N/A 8.63 in N/A 10.25 in N/A 7.98 in N/A 67 lb N/A 13.00 in N/A 12 N/A 1.00 in
10300WNAN N/A 10 N/A 17.50 in N/A 1.88 in N/A 12.75 in N/A 4.63 in N/A 10.75 in N/A 12.63 in N/A 10.02 in N/A 91 lb N/A 15.25 in N/A 16 N/A 1.13 in
12300WNAN N/A 12 N/A 20.50 in N/A 2.00 in N/A 15.00 in N/A 5.13 in N/A 12.75 in N/A 14.75 in N/A 12.00 in N/A 140 lb N/A 17.75 in N/A 16 N/A 1.25 in
14300WNAN N/A 14 N/A 23.00 in N/A 2.13 in N/A 16.25 in N/A 5.63 in N/A 14.00 in N/A 16.75 in N/A 13.25 in N/A 180 lb N/A 20.25 in N/A 20 N/A 1.25 in
16300WNAN N/A 16 N/A 25.50 in N/A 2.25 in N/A 18.50 in N/A 5.75 in N/A 16.00 in N/A 19.00 in N/A 15.25 in N/A 250 lb N/A 22.50 in N/A 20 N/A 1.38 in
18300WNAN N/A 18 N/A 28.00 in N/A 2.38 in N/A 21.00 in N/A 6.25 in N/A 18.00 in N/A 21.00 in N/A 17.25 in N/A 320 lb N/A 24.75 in N/A 24 N/A 1.38 in
20300WNAN N/A 20 N/A 30.50 in N/A 2.50 in N/A 23.00 in N/A 6.38 in N/A 20.00 in N/A 23.13 in N/A 19.25 in N/A 400 lb N/A 27.00 in N/A 24 N/A 1.38 in
22300WNAN N/A 22 N/A 33.00 in N/A 2.63 in N/A 25.25 in N/A 6.50 in N/A 22.00 in N/A 25.25 in N/A 21.25 in N/A 465 lb N/A 29.25 in N/A 24 N/A 1.63 in
24300WNAN N/A 24 N/A 36.00 in N/A 2.75 in N/A 27.25 in N/A 6.63 in N/A 24.00 in N/A 27.63 in N/A 23.25 in N/A 580 lb N/A 32.00 in N/A 24 N/A 1.63 in
Unit of Measure
1