 |
| Quantity: | |
|---|---|
SO Flange
SDFL
| Nominal Size | Outer Diameter | Central circle diameter | Bolt Hole Diameter | Number of Bolt Holes | Inner Diameter | Flange Ring Height | Weld Groove Diameter | Flange Overall Height | Sealing Face Diameter | Sealing Face Height | |
| DN | NPS | A | J | I | B | C | F | D | G | ||
| 15 | 1/2 | 95.3 | 66.5 | 15.7 | 4 | 22.4 | 14.2 | 38.1 | 22.4 | 35.1 | 6.4 |
| 20 | 3/4 | 117.3 | 82.6 | 19.1 | 4 | 27.7 | 15.7 | 47.8 | 25.4 | 42.9 | 6.4 |
| 25 | 1 | 124 | 88.9 | 19.1 | 4 | 34.5 | 17.5 | 53.8 | 26.9 | 50.8 | 6.4 |
| 32 | 1-1/4 | 133.4 | 98.6 | 19.1 | 4 | 43.2 | 20.6 | 63.5 | 28.4 | 63.5 | 6.4 |
| 40 | 1-1/2 | 155.4 | 114.3 | 22.4 | 4 | 49.5 | 22.4 | 69.85 | 31.75 | 73.15 | 6.4 |
| 50 | 2 | 165.1 | 127 | 19.1 | 8 | 62 | 25.4 | 84.1 | 36.6 | 91.9 | 6.4 |
| 65 | 2-1/2 | 190.5 | 149.4 | 22.4 | 8 | 74.7 | 28.4 | 100.1 | 41.1 | 104.6 | 6.4 |
| 80 | 3 | 209.6 | 168.1 | 22.4 | 8 | 90.7 | 31.75 | 117.3 | 46 | 127 | 6.4 |
| 90 | 3-1/2 | 228.6 | 184.2 | 25.4 | 8 | 103.4 | 35.1 | 133.4 | 49.3 | 139.7 | 6.4 |
| 100 | 4 | 273.1 | 215.9 | 25.4 | 8 | 116.1 | 38.1 | 152.4 | 53.8 | 157.2 | 6.4 |
| 125 | 5 | 330.2 | 266.7 | 28.4 | 8 | 143.8 | 44.5 | 189 | 60.45 | 185.7 | 6.4 |
| 150 | 6 | 355.6 | 292.1 | 28.4 | 12 | 170.7 | 47.8 | 222.3 | 66.55 | 215.9 | 6.4 |
| 200 | 8 | 419.1 | 349.3 | 31.8 | 12 | 221.5 | 55.6 | 273.1 | 76.2 | 269.7 | 6.4 |
| 250 | 10 | 508 | 431.8 | 35.1 | 16 | 276.3 | 63.5 | 342.9 | 85.9 | 323.9 | 6.4 |
| 300 | 12 | 558.8 | 489 | 35.1 | 20 | 327.1 | 66.55 | 400.1 | 91.9 | 381 | 6.4 |
| 350 | 14 | 603.3 | 527.1 | 38.1 | 20 | 359.1 | 69.85 | 431.8 | 93.7 | 412.8 | 6.4 |
| 400 | 16 | 685.8 | 603.3 | 41.1 | 20 | 410.5 | 76.2 | 495.3 | 106.4 | 469.9 | 6.4 |
| 450 | 18 | 743 | 654.1 | 44.5 | 20 | 461.8 | 82.6 | 546.1 | 117.3 | 533.4 | 6.4 |
| 500 | 20 | 812.8 | 723.9 | 44.5 | 24 | 513.1 | 88.9 | 609.6 | 127 | 584.2 | 6.4 |
| 600 | 24 | 939.8 | 838.2 | 50.8 | 24 | 616 | 101.6 | 717.6 | 139.7 | 692.2 | 6.4 |
Applications
Limited Space & Budget Systems:
(1)ANSI Class 150/300 utility piping (e.g., plant cooling water).
(2)Temporary test connections during plant commissioning.
Non-Cyclic Services:
(1)Low-pressure vent lines (ASME B31.3 Category D fluid).
(2)HVAC duct connections in industrial buildings.
Characteristics
Hubless Design:
(1)Flat back face simplifies machining (B16.5 Fig. 9).
(2)Dual fillet welds (internal/external) mandatory per Para. 6.4.2.
Pressure Derating Rule:
(1)Max temp: 370°C (Table 2-2.1).
(2)Critical: At 300°C, Class 300 SO flange = 75% pressure rating of WN flange.
| Nominal Size | Outer Diameter | Central circle diameter | Bolt Hole Diameter | Number of Bolt Holes | Inner Diameter | Flange Ring Height | Weld Groove Diameter | Flange Overall Height | Sealing Face Diameter | Sealing Face Height | |
| DN | NPS | A | J | I | B | C | F | D | G | ||
| 15 | 1/2 | 95.3 | 66.5 | 15.7 | 4 | 22.4 | 14.2 | 38.1 | 22.4 | 35.1 | 6.4 |
| 20 | 3/4 | 117.3 | 82.6 | 19.1 | 4 | 27.7 | 15.7 | 47.8 | 25.4 | 42.9 | 6.4 |
| 25 | 1 | 124 | 88.9 | 19.1 | 4 | 34.5 | 17.5 | 53.8 | 26.9 | 50.8 | 6.4 |
| 32 | 1-1/4 | 133.4 | 98.6 | 19.1 | 4 | 43.2 | 20.6 | 63.5 | 28.4 | 63.5 | 6.4 |
| 40 | 1-1/2 | 155.4 | 114.3 | 22.4 | 4 | 49.5 | 22.4 | 69.85 | 31.75 | 73.15 | 6.4 |
| 50 | 2 | 165.1 | 127 | 19.1 | 8 | 62 | 25.4 | 84.1 | 36.6 | 91.9 | 6.4 |
| 65 | 2-1/2 | 190.5 | 149.4 | 22.4 | 8 | 74.7 | 28.4 | 100.1 | 41.1 | 104.6 | 6.4 |
| 80 | 3 | 209.6 | 168.1 | 22.4 | 8 | 90.7 | 31.75 | 117.3 | 46 | 127 | 6.4 |
| 90 | 3-1/2 | 228.6 | 184.2 | 25.4 | 8 | 103.4 | 35.1 | 133.4 | 49.3 | 139.7 | 6.4 |
| 100 | 4 | 273.1 | 215.9 | 25.4 | 8 | 116.1 | 38.1 | 152.4 | 53.8 | 157.2 | 6.4 |
| 125 | 5 | 330.2 | 266.7 | 28.4 | 8 | 143.8 | 44.5 | 189 | 60.45 | 185.7 | 6.4 |
| 150 | 6 | 355.6 | 292.1 | 28.4 | 12 | 170.7 | 47.8 | 222.3 | 66.55 | 215.9 | 6.4 |
| 200 | 8 | 419.1 | 349.3 | 31.8 | 12 | 221.5 | 55.6 | 273.1 | 76.2 | 269.7 | 6.4 |
| 250 | 10 | 508 | 431.8 | 35.1 | 16 | 276.3 | 63.5 | 342.9 | 85.9 | 323.9 | 6.4 |
| 300 | 12 | 558.8 | 489 | 35.1 | 20 | 327.1 | 66.55 | 400.1 | 91.9 | 381 | 6.4 |
| 350 | 14 | 603.3 | 527.1 | 38.1 | 20 | 359.1 | 69.85 | 431.8 | 93.7 | 412.8 | 6.4 |
| 400 | 16 | 685.8 | 603.3 | 41.1 | 20 | 410.5 | 76.2 | 495.3 | 106.4 | 469.9 | 6.4 |
| 450 | 18 | 743 | 654.1 | 44.5 | 20 | 461.8 | 82.6 | 546.1 | 117.3 | 533.4 | 6.4 |
| 500 | 20 | 812.8 | 723.9 | 44.5 | 24 | 513.1 | 88.9 | 609.6 | 127 | 584.2 | 6.4 |
| 600 | 24 | 939.8 | 838.2 | 50.8 | 24 | 616 | 101.6 | 717.6 | 139.7 | 692.2 | 6.4 |
Applications
Limited Space & Budget Systems:
(1)ANSI Class 150/300 utility piping (e.g., plant cooling water).
(2)Temporary test connections during plant commissioning.
Non-Cyclic Services:
(1)Low-pressure vent lines (ASME B31.3 Category D fluid).
(2)HVAC duct connections in industrial buildings.
Characteristics
Hubless Design:
(1)Flat back face simplifies machining (B16.5 Fig. 9).
(2)Dual fillet welds (internal/external) mandatory per Para. 6.4.2.
Pressure Derating Rule:
(1)Max temp: 370°C (Table 2-2.1).
(2)Critical: At 300°C, Class 300 SO flange = 75% pressure rating of WN flange.
