MSS SP-44 — Class 600 Flange Dimensions
MSS SP-44 Class 600 Flange Dimensions — 25 sizes.
| NPS | O — Flange OD · in (in) | tf — Min. thickness · in (in) | X — Hub dia · in (in) | Y — Length thru hub · in (in) | R — Raised face · in (in) | W — Bolt circle · in (in) | Bolts — No. | Hole — Dia · in (in) | Bolt — Size · in (in) |
|---|---|---|---|---|---|---|---|---|---|
| 12 | 22 | 2.62 | 15.75 | 6.12 | 15 | 19.25 | 20 | 1.38 | 1-1/4 |
| 14 | 23.75 | 2.75 | 17 | 6.5 | 16.25 | 20.75 | 20 | 1.5 | 1-3/8 |
| 16 | 27 | 3 | 19.5 | 7 | 18.5 | 23.75 | 20 | 1.62 | 1-1/2 |
| 18 | 29.25 | 3.25 | 21.5 | 7.25 | 21 | 25.75 | 20 | 1.75 | 1-5/8 |
| 20 | 32 | 3.5 | 24 | 7.5 | 23 | 28.5 | 24 | 1.75 | 1-5/8 |
| 22 | 34.25 | 3.75 | 26.25 | 7.75 | 25.25 | 30.62 | 24 | 1.88 | — |
| 24 | 37 | 4 | 28.25 | 8 | 27.25 | 33 | 24 | 2 | 1-7/8 |
| 26 | 40 | 4.25 | 29.44 | 8.75 | 29.5 | 36 | 28 | 2 | 1-7/8 |
| 28 | 42.25 | 4.38 | 31.62 | 9.25 | 31.5 | 38 | 28 | 2.12 | 2 |
| 30 | 44.5 | 4.5 | 33.94 | 9.75 | 33.75 | 40.25 | 28 | 2.12 | 2 |
| 32 | 47 | 4.62 | 36.12 | 10.25 | 36 | 42.5 | 28 | 2.38 | 2-1/4 |
| 34 | 49 | 4.75 | 38.31 | 10.62 | 38 | 44.5 | 28 | 2.38 | 2-1/4 |
| 36 | 51.75 | 4.88 | 40.62 | 11.12 | 40.25 | 47 | 28 | 2.62 | 2-1/2 |
| 38 | 50 | 6 | 40.25 | 10 | 41.5 | 45.75 | 28 | 2.38 | 2-1/4 |
| 40 | 52 | 6.25 | 42.25 | 10.38 | 43.75 | 47.75 | 32 | 2.38 | 2-1/4 |
| 42 | 55.25 | 6.62 | 44.38 | 11 | 46 | 50.5 | 28 | 2.62 | 2-1/2 |
| 44 | 57.25 | 6.81 | 46.5 | 11.38 | 48.25 | 52.5 | 32 | 2.62 | 2-1/2 |
| 46 | 59.5 | 7.06 | 48.62 | 11.81 | 50.25 | 54.75 | 32 | 2.62 | 2-1/2 |
| 48 | 62.75 | 7.44 | 50.75 | 12.44 | 52.5 | 57.5 | 32 | 2.88 | 2-3/4 |
| 50 | 65.75 | 7.75 | 52.88 | 12.94 | 54.5 | 60 | 28 | 3.12 | 3 |
| 52 | 67.75 | 8 | 54.88 | 13.25 | 56.5 | 62 | 32 | 3.12 | 3 |
| 54 | 70 | 8.25 | 57 | 13.75 | 58.75 | 64.25 | 32 | 3.12 | 3 |
| 56 | 73 | 8.56 | 59.12 | 14.25 | 60.75 | 66.75 | 32 | 3.38 | 3-1/4 |
| 58 | 75 | 8.75 | 61.12 | 14.56 | 63 | 68.75 | 32 | 3.38 | 3-1/4 |
| 60 | 78.5 | 9.19 | 63.38 | 15.31 | 65.25 | 71.75 | 28 | 3.62 | 3-1/2 |
- All dimensions are in inches (1 in = 25.4 mm).
- Class 400 and above thickness and hub length exclude the 0.25 in raised face.
- NPS 26–60 dimensions are identical to ASME B16.47 Series A; the difference is material (A694 high-yield grades).
- Values are nominal dimensions from the standard; a dash (—) means the value is not listed. Verify against the current edition before design, purchase or fabrication.