Flange - Weld Neck, ANSI Class 150, 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 | 34 1/4 | 29 1/2 | 2 11/16 | * | 26 | 26 5/8 | 4 3/4 | 24 | 1 3/8 | 31 3/4 | 300 |
28 | 36 1/2 | 31 1/2 | 2 13/16 | * | 28 | 28 5/8 | 4 15/16 | 28 | 1 3/8 | 34 | 345 |
30 | 38 3/4 | 33 3/4 | 2 15/16 | * | 30 | 30 3/4 | 5 3/8 | 28 | 1 3/8 | 36 | 400 |
32 | 41 3/4 | 36 | 3 3/16 | * | 32 | 32 3/4 | 5 11/16 | 28 | 1 5/8 | 38 1/2 | 505 |
34 | 43 3/4 | 38 | 3 1/4 | * | 34 | 34 3/4 | 5 7/8 | 32 | 1 5/8 | 40 1/2 | 540 |
36 | 46 | 40 1/4 | 3 9/16 | * | 36 | 36 3/4 | 6 3/16 | 32 | 1 5/8 | 42 3/4 | 640 |
38 | 48 3/4 | 42 1/4 | 3 7/16 | * | 38 | 39 | 6 3/16 | 32 | 1 5/8 | 45 1/4 | 720 |
40 | 50 3/4 | 44 1/4 | 3 9/16 | * | 40 | 41 | 6 7/16 | 36 | 1 5/8 | 47 1/4 | 775 |
42 | 53 | 47 | 3 13/16 | * | 42 | 43 | 6 3/4 | 36 | 1 5/8 | 49 1/2 | 890 |
44 | 55 1/4 | 49 | 4 | * | 44 | 45 | 7 | 40 | 1 5/8 | 51 3/4 | 990 |
46 | 57 1/4 | 51 | 4 1/16 | * | 46 | 47 1/8 | 7 5/16 | 40 | 1 5/8 | 53 1/4 | 1060 |
48 | 59 1/2 | 53 1/2 | 10 1/4 | * | 48 | 49 1/8 | 7 9/16 | 44 | 1 5/8 | 56 | 1185 |
50 | 61 3/4 | 55 1/2 | 4 3/8 | * | 50 | 51 1/4 | 8 | 44 | 1 7/8 | 58 1/4 | 1270 |
52 | 64 | 57 1/2 | 4 9/16 | * | 52 | 53 1/4 | 8 1/4 | 44 | 1 7/8 | 60 1/2 | 1410 |
54 | 66 1/4 | 59 1/2 | 4 3/4 | * | 54 | 55 1/4 | 8 1/2 | 44 | 1 7/8 | 62 3/4 | 1585 |
56 | 68 3/4 | 62 | 4 7/8 | * | 56 | 57 3/8 | 9 | 48 | 1 7/8 | 65 | 1760 |
58 | 71 | 64 | 5 1/16 | * | 58 | 59 3/8 | 9 1/4 | 48 | 1 7/8 | 67 1/4 | 1915 |
60 | 73 | 66 | 5 3/16 | * | 60 | 61 3/8 | 9 7/16 | 52 | 1 7/8 | 69 1/4 | 2045 |
- * To be specified by purchaser.