ASME B16.47 Series A Class 400 Flanges | Welding Neck
We are a professional manufacturer, supplier and exporter of ASME B16.47 Series A Class 400 Welding Neck Flanges. Class 400 welding neck flanges in the ASME B16.47 Series A flange series are large diameter flanges capable of withstanding higher pressure ratings (Class 400) and suitable for pipes from NPS 26 to NPS 60. This welding neck design not only provides additional strength and stability but also can accommodate larger pipe loads, making it an ideal choice for industrial piping systems.
YANHAO ASME B16.47 Series A Class 400 welding neck flanges are cast from high-quality stainless steel, carbon steel, and alloy steel materials and are highly durable. Our product line includes standard-size flanges, and we also provide customized services to meet customers’ needs for special types and aperture flanges. If you have special flange requirements or specifications or need further technical support, please feel free to contact our team of experts.
Class 400 dimensions | ASME B16.47 Series A Flange
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Bore (B) | Top of Hub (A) | Hub Diameter (X) | Minimum Fillet Radius (r) | Minimum Thickness (T) | Length Thru Hub (Y) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 26 | 38.25 | 34.50 | 29.50 | 28 | 1.88 | Specified by purchaser | 26.00 | 28.62 | 0.44 | 3.50 | 7.62 | 650 |
| 28 | 40.75 | 37.00 | 31.50 | 28 | 2.00 | Specified by purchaser | 28.00 | 30.81 | 0.50 | 3.75 | 8.12 | 785 |
| 30 | 43.00 | 39.25 | 33.75 | 28 | 2.12 | Specified by purchaser | 30.00 | 32.94 | 0.50 | 4.00 | 8.62 | 905 |
| 32 | 45.25 | 41.50 | 36.00 | 28 | 2.12 | Specified by purchaser | 32.00 | 35.00 | 0.50 | 4.25 | 9.12 | 1065 |
| 34 | 47.50 | 43.50 | 38.00 | 28 | 2.12 | Specified by purchaser | 34.00 | 37.19 | 0.56 | 4.38 | 9.50 | 1200 |
| 36 | 50.00 | 46.00 | 40.25 | 32 | 2.12 | Specified by purchaser | 36.00 | 39.38 | 0.56 | 4.50 | 9.88 | 1340 |
| 38 | 47.50 | 44.00 | 40.75 | 32 | 1.88 | Specified by purchaser | 38.00 | 39.50 | 0.56 | 4.88 | 8.12 | 935 |
| 40 | 50.00 | 46.25 | 43.00 | 32 | 2.00 | Specified by purchaser | 40.00 | 41.50 | 0.56 | 5.12 | 8.50 | 1090 |
| 42 | 52.00 | 48.25 | 45.00 | 32 | 2.00 | Specified by purchaser | 42.00 | 43.62 | 0.56 | 5.25 | 8.81 | 1190 |
| 44 | 54.50 | 50.50 | 47.25 | 32 | 2.12 | Specified by purchaser | 44.00 | 45.62 | 0.56 | 5.50 | 9.18 | 1375 |
| 46 | 56.75 | 52.75 | 49.50 | 36 | 2.12 | Specified by purchaser | 46.00 | 47.75 | 0.56 | 5.75 | 9.62 | 1525 |
| 48 | 59.50 | 55.25 | 51.50 | 28 | 2.38 | Specified by purchaser | 48.00 | 49.88 | 0.56 | 6.00 | 10.12 | 1790 |
| 50 | 61.75 | 57.50 | 53.62 | 32 | 2.38 | Specified by purchaser | 50.00 | 52.00 | 0.56 | 6.19 | 10.56 | 1950 |
| 52 | 63.75 | 59.50 | 55.62 | 32 | 2.38 | Specified by purchaser | 52.00 | 54.00 | 0.56 | 6.38 | 10.88 | 2125 |
| 54 | 67.00 | 62.25 | 57.88 | 28 | 2.62 | Specified by purchaser | 54.00 | 56.12 | 0.56 | 6.69 | 11.38 | 2565 |
| 56 | 69.00 | 64.25 | 60.12 | 32 | 2.62 | Specified by purchaser | 56.00 | 58.25 | 0.56 | 6.88 | 11.75 | 2710 |
| 58 | 71.00 | 66.25 | 62.12 | 32 | 2.62 | Specified by purchaser | 58.00 | 60.25 | 0.56 | 7.00 | 12.06 | 3230 |
| 60 | 74.25 | 69.00 | 64.38 | 32 | 2.88 | Specified by purchaser | 60.00 | 62.38 | 0.56 | 7.31 | 12.56 | 3820 |
Weld Neck Flange
Weld Neck Flange is a type of industrial pipe connection, especially used in pressure pipeline systems. Thanks to the high structural strength, sealing performance, corrosion resistance, and the characteristics of withstanding high temperature and pressure of the welding neck flange, it can be used for oil transportation pipelines, ship pipeline systems, and the transportation of raw materials in chemical plants, etc.
