Schematic — drawn from the table, not to scale for inspection.
| Symbol | Item | Value |
|---|---|---|
| D | Outside diameter | 1270mm |
| C | Flange thickness / blind thickness | 128.6mm |
| D2 | Raised face diameter | 1022mm |
| f | Raised face height | 6.4mm |
| K | Bolt circle diameter | 1168.4mm |
| n | Number of bolt holes | 32pcs |
| d | Bolt hole diameter | 54mm |
| — | Approximate weight | 1277kg |
Source: Table 3 (p. 14) — pressure–temperature ratings for Group 1.1 materials, SI units; Group 1.1.
Base material: ASTM A105 (North America, Middle East)
Rating: Series A follows the former MSS SP-44 dimensions. Ratings are ASME classes 150, 300, 400, 600 and 900, with allowable pressures read from the B16.47 pressure–temperature tables for the material group and design temperature.
Tolerances / marking: Tolerances, material and marking: ASME B16.47-2025. Series A and Series B are not interchangeable.