SERIES A
ASME B16.47 Class 400 Series A Welding Neck Flanges
SPECIFICATIONS
▪ All dimensions are in inches
▪ 1/4" raised face will be added to the thickness and overall
length unless otherwise specified
length unless otherwise specified
▪ Flat face option available
| Nominal Pipe Size |
Outside Diameter |
Minimum Thickness |
Raised Face Diameter |
Length Thru Hub |
Hub Diameter |
Minimum Fillet Radius |
Top of Hub |
Bore | Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
| (O) | (T) | (R) | (Y) | (X) | (r) | (A) | (B) | (lbs) | (C) | |||
| 26 | 38.25 | 3.50 | 29.50 | 7.62 | 28.62 | 0.44 | 26 | Specified by purchaser |
650 | 34.50 | 28 | 1.88 |
| 28 | 40.75 | 3.75 | 31.50 | 8.12 | 30.81 | 0.50 | 28 | Specified by purchaser |
785 | 37.00 | 28 | 2.00 |
| 30 | 43.00 | 4.00 | 33.75 | 8.62 | 32.94 | 0.50 | 30 | Specified by purchaser |
905 | 39.25 | 28 | 2.12 |
| 32 | 45.25 | 4.25 | 36.00 | 9.12 | 35.00 | 0.50 | 32 | Specified by purchaser |
1065 | 41.50 | 28 | 2.12 |
| 34 | 47.50 | 4.38 | 38.00 | 9.50 | 37.19 | 0.56 | 34 | Specified by purchaser |
1200 | 43.50 | 28 | 2.12 |
| 36 | 50.00 | 4.50 | 40.25 | 9.88 | 39.38 | 0.56 | 36 | Specified by purchaser |
1340 | 46.00 | 32 | 2.12 |
| 38 | 47.50 | 4.88 | 40.75 | 8.12 | 39.50 | 0.56 | 38 | Specified by purchaser |
935 | 44.00 | 32 | 1.88 |
| 40 | 50.00 | 5.12 | 43.00 | 8.50 | 41.50 | 0.56 | 40 | Specified by purchaser |
1090 | 46.25 | 32 | 2.00 |
| 42 | 52.00 | 5.25 | 45.00 | 8.81 | 43.62 | 0.56 | 42 | Specified by purchaser |
1190 | 48.25 | 32 | 2.00 |
| 44 | 54.50 | 5.50 | 47.25 | 9.18 | 45.62 | 0.56 | 44 | Specified by purchaser |
1375 | 50.50 | 32 | 2.12 |
| 46 | 56.75 | 5.75 | 49.50 | 9.62 | 47.75 | 0.56 | 46 | Specified by purchaser |
1525 | 52.75 | 36 | 2.12 |
| 48 | 59.50 | 6.00 | 51.50 | 10.12 | 49.88 | 0.56 | 48 | Specified by purchaser |
1790 | 55.25 | 28 | 2.38 |
| 50 | 61.75 | 6.19 | 53.62 | 10.56 | 52.00 | 0.56 | 50 | Specified by purchaser |
1950 | 57.50 | 32 | 2.38 |
| 52 | 63.75 | 6.38 | 55.62 | 10.88 | 54.00 | 0.56 | 52 | Specified by purchaser |
2125 | 59.50 | 32 | 2.38 |
| 54 | 67.00 | 6.69 | 57.88 | 11.38 | 56.12 | 0.56 | 54 | Specified by purchaser |
2565 | 62.25 | 28 | 2.62 |
| 56 | 69.00 | 6.88 | 60.12 | 11.75 | 58.25 | 0.56 | 56 | Specified by purchaser |
2710 | 64.25 | 32 | 2.62 |
| 58 | 71.00 | 7.00 | 62.12 | 12.06 | 60.25 | 0.56 | 58 | Specified by purchaser |
3230 | 66.25 | 32 | 2.62 |
| 60 | 74.25 | 7.31 | 64.38 | 12.56 | 62.38 | 0.56 | 60 | Specified by purchaser |
3820 | 69.00 | 32 | 2.88 |