SERIES B
ASME B16.47 Class 300 Series B 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 | 34.12 | 3.50 | 29.00 | 5.69 | 27.62 | 0.56 | 26.19 | Specified by purchaser | 400 | 31.62 | 32 | 1.38 |
| 28 | 36.25 | 3.50 | 31.00 | 5.88 | 29.75 | 0.56 | 28.19 | Specified by purchaser | 450 | 33.75 | 36 | 1.38 |
| 30 | 39.00 | 3.69 | 33.25 | 6.22 | 32.00 | 0.56 | 30.25 | Specified by purchaser |
550 | 36.25 | 36 | 1.50 |
| 32 | 41.50 | 4.06 | 35.50 | 6.62 | 34.00 | 0.62 | 32.25 | Specified by purchaser |
685 | 38.50 | 32 | 1.62 |
| 34 | 43.62 | 4.06 | 37.50 | 6.81 | 36.12 | 0.62 | 34.25 | Specified by purchaser |
750 | 40.62 | 36 | 1.62 |
| 36 | 46.12 | 4.06 | 39.75 | 7.12 | 38.00 | 0.62 | 36.25 | Specified by purchaser |
840 | 42.88 | 32 | 1.75 |
| 38 | 48.12 | 4.38 | 41.75 | 7.56 | 40.00 | 0.62 | 38.25 | Specified by purchaser |
915 | 44.88 | 36 | 1.75 |
| 40 | 50.12 | 4.56 | 43.88 | 7.81 | 42.00 | 0.62 | 40.25 | Specified by purchaser |
990 | 46.88 | 40 | 1.75 |
| 42 | 52.50 | 4.69 | 46.00 | 8.06 | 44.00 | 0.62 | 42.31 | Specified by purchaser |
1135 | 49.00 | 36 | 1.88 |
| 44 | 54.50 | 5.00 | 48.00 | 8.44 | 46.19 | 0.62 | 44.31 | Specified by purchaser |
1235 | 51.00 | 40 | 1.88 |
| 46 | 57.50 | 5.06 | 50.00 | 8.75 | 48.38 | 0.62 | 46.31 | Specified by purchaser |
1470 | 53.75 | 36 | 2.00 |
| 48 | 59.50 | 5.06 | 52.25 | 8.81 | 50.31 | 0.62 | 48.31 | Specified by purchaser |
1575 | 55.75 | 40 | 2.00 |
| 50 | 61.50 | 5.44 | 54.25 | 9.25 | 52.38 | 0.62 | 50.31 | Specified by purchaser |
1710 | 57.75 | 44 | 2.00 |
| 52 | 63.50 | 5.62 | 56.25 | 9.56 | 54.44 | 0.62 | 52.31 | Specified by purchaser |
1840 | 59.75 | 48 | 2.00 |
| 54 | 65.88 | 5.38 | 58.25 | 9.44 | 56.50 | 0.62 | 54.31 | Specified by purchaser |
1980 | 62.12 | 48 | 2.00 |
| 56 | 69.50 | 6.06 | 60.50 | 10.56 | 58.81 | 0.69 | 56.31 | Specified by purchaser |
2595 | 65.00 | 36 | 2.38 |
| 58 | 71.94 | 6.06 | 62.75 | 10.81 | 60.94 | 0.69 | 58.31 | Specified by purchaser |
2770 | 67.44 | 40 | 2.38 |
| 60 | 73.94 | 5.94 | 65.00 | 10.69 | 62.94 | 0.69 | 60.31 | Specified by purchaser |
2870 | 69.44 | 40 | 2.38 |