Flange - Weld Neck, ANSI Class 400, B16.47 Series A (in)
- Dimensions to ASME B16.47 - Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
- Bolt circle diameters are 1/8 inch larger than bolt diameter.
Pipe Size
(NPS) | Outside Diameter of Flange
A | Diameter of Raised Face
B | Thickness of Flange
C | Diameter of Bore
D | Diameter of Hub at Weld
H | Diameter of Hub at Base
J | Length of Hub
K | Number of Bolt Holes
| Diameter of Bolt Holes
| Bolt Circle Diameter
P | Approx. Weight
(lb) |
---|---|---|---|---|---|---|---|---|---|---|---|
26 | 38 1/4 | 29 1/2 | 3 1/2 | * | 26 | 28 5/8 | 7 5/8 | 28 | 1 7/8 | 34 1/2 | 650 |
28 | 40 3/4 | 31 1/2 | 3 3/4 | * | 28 | 30 13/16 | 8 1/8 | 28 | 2 | 37 | 785 |
30 | 43 | 33 3/4 | 4 | * | 30 | 32 15/16 | 8 5/8 | 28 | 2 1/8 | 39 1/4 | 905 |
32 | 45 1/4 | 36 | 4 1/4 | * | 32 | 35 | 9 1/8 | 28 | 2 1/8 | 41 1/2 | 1065 |
34 | 47 1/2 | 38 | 4 3/8 | * | 34 | 37 3/16 | 9 1/2 | 28 | 2 1/8 | 43 1/2 | 1200 |
36 | 50 | 40 1/4 | 4 1/4 | * | 36 | 39 3/8 | 9 7/8 | 32 | 2 1/8 | 46 | 1340 |
38 | 47 1/2 | 40 3/4 | 4 1/8 | * | 38 | 39 1/2 | 8 1/8 | 32 | 1 7/8 | 44 | 935 |
40 | 50 | 43 | 5 1/8 | * | 40 | 41 1/2 | 8 1/2 | 32 | 2 | 46 1/4 | 1090 |
42 | 52 | 45 | 5 1/4 | * | 42 | 43 5/8 | 8 13/16 | 32 | 2 | 48 1/4 | 1190 |
44 | 54 1/2 | 47 1/4 | 5 1/2 | * | 44 | 45 5/8 | 8 3/16 | 32 | 2 1/8 | 50 1/2 | 1375 |
46 | 56 3/4 | 49 1/2 | 5 3/4 | * | 46 | 47 3/4 | 9 5/8 | 36 | 2 1/8 | 52 3/4 | 1525 |
48 | 59 1/2 | 51 1/2 | 6 | * | 48 | 49 7/8 | 10 1/8 | 28 | 2 3/8 | 55 1/4 | 1790 |
50 | 61 3/4 | 53 5/8 | 6 3/16 | * | 50 | 52 | 10 9/16 | 32 | 2 3/8 | 57 1/2 | 1950 |
52 | 63 3/4 | 55 5/8 | 6 3/8 | * | 52 | 54 | 10 7/8 | 32 | 2 3/8 | 59 1/2 | 2125 |
54 | 67 | 57 7/8 | 6 11/16 | * | 54 | 56 1/8 | 11 3/8 | 28 | 2 5/8 | 62 1/4 | 2565 |
56 | 69 | 60 1/8 | 6 1/8 | * | 56 | 58 1/4 | 11 3/4 | 32 | 2 5/8 | 64 1/4 | 2710 |
58 | 71 | 62 1/8 | 7 | * | 58 | 60 1/4 | 12 1/16 | 32 | 2 5/8 | 66 1/4 | 3230 |
60 | 71 1/4 | 64 3/8 | 7 5/16 | * | 60 | 62 3/8 | 12 9/16 | 32 | 2 7/8 | 69 | 3820 |
- * To be specified by purchaser.