SERIES A
ASME B16.47 Class 300 Series A Welding Neck Flanges
SPECIFICATIONS
▪ All dimensions are in inches
▪ These flanges will be supplied with a 1/16" raised face
unless otherwise specified
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 | 3.12 | 29.50 | 7.25 | 28.38 | 0.38 | 26 | Specified by purchaser |
605 | 34.50 | 28 | 1.75 |
| 28 | 40.75 | 3.38 | 31.50 | 7.75 | 30.50 | 0.44 | 28 | Specified by purchaser |
745 | 37.00 | 28 | 1.75 |
| 30 | 43.00 | 3.62 | 33.75 | 8.25 | 32.56 | 0.44 | 30 | Specified by purchaser |
870 | 39.25 | 28 | 1.88 |
| 32 | 45.25 | 3.88 | 36.00 | 8.75 | 34.69 | 0.44 | 32 | Specified by purchaser |
1005 | 41.50 | 28 | 2.00 |
| 34 | 47.50 | 4.00 | 38.00 | 9.12 | 36.88 | 0.50 | 34 | Specified by purchaser |
1145 | 43.50 | 28 | 2.00 |
| 36 | 50.00 | 4.12 | 40.25 | 9.50 | 39.00 | 0.50 | 36 | Specified by purchaser |
1275 | 46.00 | 32 | 2.12 |
| 38 | 46.00 | 4.25 | 40.50 | 7.12 | 39.12 | 0.50 | 38 | Specified by purchaser |
695 | 43.00 | 32 | 1.62 |
| 40 | 48.75 | 4.50 | 42.75 | 7.62 | 41.25 | 0.50 | 40 | Specified by purchaser |
840 | 45.50 | 32 | 1.75 |
| 42 | 50.75 | 4.69 | 44.75 | 7.88 | 43.25 | 0.50 | 42 | Specified by purchaser |
950 | 47.50 | 32 | 1.75 |
| 44 | 53.25 | 4.88 | 47.00 | 8.12 | 45.25 | 0.50 | 44 | Specified by purchaser |
1055 | 49.75 | 32 | 1.88 |
| 46 | 55.75 | 5.06 | 49.00 | 8.50 | 47.38 | 0.50 | 46 | Specified by purchaser |
1235 | 52.00 | 28 | 2.00 |
| 48 | 57.75 | 5.25 | 51.25 | 8.81 | 49.38 | 0.50 | 48 | Specified by purchaser |
1380 | 54.00 | 32 | 2.00 |
| 50 | 60.25 | 5.50 | 53.50 | 9.12 | 51.38 | 0.50 | 50 | Specified by purchaser |
1530 | 56.25 | 32 | 2.12 |
| 52 | 62.25 | 5.69 | 55.50 | 9.38 | 53.38 | 0.50 | 52 | Specified by purchaser |
1660 | 58.25 | 32 | 2.12 |
| 54 | 65.25 | 6.00 | 57.75 | 9.94 | 55.50 | 0.50 | 54 | Specified by purchaser |
2050 | 61.00 | 28 | 2.38 |
| 56 | 67.25 | 6.06 | 59.75 | 10.25 | 57.62 | 0.50 | 56 | Specified by purchaser |
2155 | 63.00 | 28 | 2.38 |
| 58 | 69.25 | 6.25 | 62.00 | 10.50 | 59.62 | 0.50 | 58 | Specified by purchaser |
2270 | 65.00 | 32 | 2.38 |
| 60 | 71.25 | 6.44 | 64.00 | 10.75 | 61.62 | 0.50 | 60 | Specified by purchaser |
2470 | 67.00 | 32 | 2.38 |