Approx Price:
Usage/Application: Oil Industries, Chemical Industries
Standard: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA
Number Of Holes: 4 / 8 / 12 / 16 / 20
Type: Weld Neck Flange Class 400
Material: Stainless Steel, Alloy Steel, Carbon Steel, Duplex Steel, Nickel Alloys
Flange Thickness: 14.3mm to 76.2mm
Weld Neck Flange Class 400 (ASME B16.5) Dimensions |
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| Size in Inch | Size in mm | Outer Diameter | Flange Thickness | Hub OD | Weld Neck OD | Welding Neck Length | Bore | RF Diameter | RF Height | PCD | Weld Face |
| A | B | C | D | E | F | G | H | I | J | ||
| 1/2 | 15 | 95 | 14.3 | 38 | 21.3 | 52 | Welding Neck bore is derived from the pipe schedule | 34.9 | 7 | 66.7 | 1.6 |
| 3/4 | 20 | 115 | 15.9 | 48 | 26.7 | 57 | 42.9 | 7 | 82.6 | 1.6 | |
| 1 | 25 | 125 | 17.5 | 54 | 33.4 | 62 | 50.8 | 7 | 88.9 | 1.6 | |
| 1 1/4 | 32 | 135 | 20.7 | 64 | 42.2 | 67 | 63.5 | 7 | 98.4 | 1.6 | |
| 1 1/2 | 40 | 155 | 22.3 | 70 | 48.3 | 70 | 73 | 7 | 114.3 | 1.6 | |
| 2 | 50 | 165 | 25.4 | 84 | 60.3 | 73 | 92.1 | 7 | 127 | 1.6 | |
| 2 1/2 | 65 | 190 | 28.6 | 100 | 73 | 79 | 104.8 | 7 | 149.2 | 1.6 | |
| 3 | 80 | 210 | 31.8 | 117 | 88.9 | 83 | 127 | 7 | 168.3 | 1.6 | |
| 3 1/2 | 90 | 230 | 35 | 133 | 101.6 | 86 | 139.7 | 7 | 184.2 | 1.6 | |
| 4 | 100 | 255 | 35 | 146 | 114.3 | 89 | 157.2 | 7 | 200 | 1.6 | |
| 5 | 125 | 280 | 38.1 | 178 | 141.3 | 102 | 185.7 | 7 | 235 | 1.6 | |
| 6 | 150 | 320 | 41.3 | 206 | 168.3 | 103 | 215.9 | 7 | 269.9 | 1.6 | |
| 8 | 200 | 380 | 47.7 | 260 | 219.1 | 117 | 269.9 | 7 | 330 | 1.6 | |
| 10 | 250 | 445 | 54 | 321 | 273 | 124 | 323.8 | 7 | 387.4 | 1.6 | |
| 12 | 300 | 520 | 57.2 | 375 | 323.8 | 137 | 381 | 7 | 450.8 | 1.6 | |
| 14 | 350 | 585 | 60.4 | 425 | 355.6 | 149 | 412.8 | 7 | 514.4 | 1.6 | |
| 16 | 400 | 650 | 63.5 | 483 | 406.4 | 152 | 469.9 | 7 | 571.5 | 1.6 | |
| 18 | 450 | 710 | 66.7 | 533 | 457 | 165 | 533.4 | 7 | 628.6 | 1.6 | |
| 20 | 500 | 775 | 69.9 | 587 | 508 | 168 | 584.2 | 7 | 685.8 | 1.6 | |
| 24 | 600 | 915 | 76.2 | 702 | 610 | 175 | 692.2 | 7 | 812.8 | 1.6 | |
Class 400 Weld Neck Flange Stud & Bolt Dimensions |
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| Size in Inch | Size in mm | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size |
| 1/2 | 15 | 4 | 1/2 | 75 | 5/8 | M14 |
| 3/4 | 20 | 4 | 5/8 | 90 | 3/4 | M16 |
| 1 | 25 | 4 | 5/8 | 90 | 3/4 | M16 |
| 1 1/4 | 32 | 4 | 5/8 | 95 | 3/4 | M16 |
| 1 1/2 | 40 | 4 | 3/4 | 110 | 7/8 | M20 |
| 2 | 50 | 8 | 5/8 | 110 | 3/4 | M16 |
| 2 1/2 | 65 | 8 | 3/4 | 120 | 7/8 | M20 |
| 3 | 80 | 8 | 3/4 | 125 | 7/8 | M20 |
| 3 1/2 | 90 | 8 | 7/8 | 140 | 1 | M24 |
| 4 | 100 | 8 | 7/8 | 140 | 1 | M24 |
| 5 | 125 | 8 | 7/8 | 145 | 1 | M24 |
| 6 | 150 | 12 | 7/8 | 150 | 1 | M24 |
| 8 | 200 | 12 | 1 | 170 | 1 1/8 | M27 |
| 10 | 250 | 16 | 1 1/8 | 190 | 1 1/4 | M30 |
| 12 | 300 | 16 | 1 1/4 | 205 | 1 3/8 | M33 |
| 14 | 350 | 20 | 1 1/4 | 210 | 1 3/8 | M33 |
| 16 | 400 | 20 | 1 3/8 | 220 | 1 1/2 | M36 |
| 18 | 450 | 24 | 1 3/8 | 230 | 1 1/2 | M36 |
| 20 | 500 | 24 | 1 1/2 | 240 | 1 3/4 | M39 |
| 24 | 600 | 24 | 1 3/4 | 265 | 1 7/8 | M45 |
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