ASME B16.5 Class 400 Weld Neck Flanges
ASME B16.5 Class 400 Weld Neck flange dimensions are applicable to all flange materials. Hayward Pipe distributes industrial and commercial flanges in all the materials listed below. We work with manufacturers in the US and globally to insure the highest quality products and the fastest delivery times.
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Common produced materials:
ASTM A105 & A105N Forged Carbon Steel
ASTM A182 F11 & F22 Chrome
ASTM A182 F304/304L, F316/316L
ASTM A350 LF2
These materials have limited "off the shelf" availability and can be made to order.
ASTM A182 Stainless Steel F309, F310, F317, F321 & F347
ASTM A182 Chrome F1, F5, F9 & F91
ASTM A182 Duplex Stainless Steel 2205 & 2507
ASTM B241 Aluminum 6061-T6
ASTM B462 Alloy 20
ASTM B564 Alloy C22, C276, A400, A600, A625, A800 & A825
ASME B16.5 Class 400
| Size | ID* | OD | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | H1 | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | .55" | 3.75" | 2.62" | 1.38" | .250" | 1.50" | 0.84" | 2.31" | 0.56" | 2.06" | 0.62" | 4 |
| 3/4" | .74" | 4.62" | 3.25" | 1.69" | .250" | 1.88" | 1.05" | 2.50" | 0.62" | 2.25" | 0.75" | 4 |
| 1" | .96" | 4.88" | 3.50" | 2.00" | .250" | 2.12" | 1.32" | 2.69" | 0.69" | 2.44" | 0.75" | 4 |
| 1-1/4" | 1.28" | 5.25" | 3.88" | 2.50" | .250" | 2.50" | 1.66" | 2.87" | 0.81" | 2.62" | 0.75" | 4 |
| 1-1/2" | 1.50" | 6.12" | 4.50" | 2.88" | .250" | 2.75" | 1.90" | 3.00" | 0.88" | 2.75" | 0.88" | 4 |
| 2" | 1.94" | 6.50" | 5.00" | 3.62" | .250" | 3.31" | 2.38" | 3.13" | 1.00" | 2.88" | 0.75" | 8 |
| 2-1/2" | 2.32" | 7.50" | 5.88" | 4.12" | .250" | 3.94" | 2.88" | 3.37" | 1.12" | 3.12" | 0.88" | 8 |
| 3" | 2.90" | 8.25" | 6.62" | 5.00" | .250" | 4.62" | 3.50" | 3.50" | 1.25" | 3.25" | 0.88" | 8 |
| 3-1/2" | 3.36" | 9.00" | 7.25" | 5.50" | .250" | 5.25" | 4.00" | 3.63" | 1.38" | 3.38" | 1.00" | 8 |
| 4" | 3.83" | 10.00" | 7.88" | 6.19" | .250" | 5.75" | 4.50" | 3.75" | 1.38" | 3.50" | 1.00" | 8 |
| 5" | 4.81" | 11.00" | 9.25" | 7.31" | .250" | 7.00" | 5.56" | 4.25" | 1.50" | 4.00" | 1.00" | 8 |
| 6" | 5.76" | 12.50" | 10.62" | 8.50" | .250" | 8.12" | 6.63" | 4.31" | 1.62" | 4.06" | 1.00" | 12 |
| 8" | 7.63" | 15.00" | 13.00" | 10.62" | .250" | 10.25" | 8.63" | 4.87" | 1.88" | 4.62" | 1.12" | 12 |
| 10" | 9.75" | 17.50" | 15.25" | 12.75" | .250" | 12.62" | 10.75" | 5.13" | 2.12" | 4.88" | 1.25" | 16 |
| 12" | 11.75" | 20.50" | 17.75" | 15.00" | .250" | 14.75" | 12.75" | 5.63" | 2.25" | 5.38" | 1.38" | 16 |
| 14" | 13.00" | 23.00" | 20.25" | 16.25" | .250" | 16.75" | 14.00" | 6.13" | 2.38" | 5.88" | 1.38" | 20 |
| 16" | 15.00" | 25.50" | 22.50" | 18.50" | .250" | 19.00" | 16.00" | 6.25" | 2.50" | 6.00" | 1.50" | 20 |
| 18" | 17.00" | 28.00" | 24.75" | 21.00" | .250" | 21.00" | 18.00" | 6.75" | 2.62" | 6.50" | 1.50" | 24 |
| 20" | 19.00" | 30.50" | 27.00" | 23.00" | .250" | 23.12" | 20.00" | 6.87" | 2.75" | 6.62" | 1.62" | 24 |
| 22" | 21.00" | 33.00" | 29.25" | 25.25" | .250" | 25.25" | 22.00" | 7.00" | 2.88" | 6.75" | 1.75" | 24 |
| 24" | 23.00" | 36.00" | 32.00" | 27.25" | .250" | 27.62" | 24.00" | 7.13" | 3.00" | 6.88" | 1.88" | 24 |
ID shows extra heavy bore. Please specify bore when ordering.