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SO Flange
SDFL
| Technical Parameters | Description (based on EN 1092-1 for DN80 PN10) |
| Outer Diameter (D) | 200 mm |
| Bolt hole pitch circle diameter (PCD) | 160 mm |
| Number of bolt holes (n) | 8 |
| Bolt hole diameter (d) | 18 mm |
| Flange thickness (C) | 20 mm |
| Neck height (H) | ~16 mm (This value is smaller for SO flanges) |
| Flange inner diameter (B) | ~82 mm (depending on the supporting pipeline) |
| Sealing surface type | Usually FF (Flat Face) or RF (Raised Face) |
| Sealing surface diameter/size | FF: Complete flat surface; RF: The diameter and height of the boss are specified |
| Pressure-temperature rating | non-constant value |
