ASME B16.5 Class 400 Flanges | Threaded
ASME B16.5 Class 400 threaded flanges have built-in threads and do not require welding. They can be directly connected to pipes or fittings with corresponding external threads. Threaded flanges are easy to install and provide good sealing performance, but compared to welded flanges, they have lower strength and rigidity, making them more suitable for use in low-pressure piping systems, such as heating, ventilation, and air conditioning (HVAC), as well as in industries that value simplicity.
YANHAO ASME B16.5 threaded flanges are made of stainless steel, carbon steel, and alloy steel, offering high corrosion resistance and temperature resistance. We also provide additional components such as gasketed flanges, bolts, nuts, flange covers, or flange cover gaskets. We typically offer standard flanges; if you need to order special types of flanges, please get in touch with our experts.
Class 400(Threaded) dimensions | ASME B16.5 Flange
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Hub Diameter (X) | Thickness (T) | Length Thru Hub (Y) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 2.62 | 1.38 | 4 | 0.63 | 1.50 | 0.56 | 0.88 | 2 |
| 3/4 | 4.62 | 3.25 | 1.69 | 4 | 0.75 | 1.88 | 0.62 | 1.00 | 3 |
| 1 | 4.88 | 3.50 | 2.00 | 4 | 0.75 | 2.12 | 0.69 | 1.06 | 4 |
| 1 1/4 | 5.25 | 3.88 | 2.50 | 4 | 0.75 | 2.50 | 0.81 | 1.12 | 5 |
| 1 1/2 | 6.12 | 4.50 | 2.88 | 4 | 0.88 | 2.75 | 0.88 | 1.25 | 7 |
| 2 | 6.50 | 5.00 | 3.62 | 8 | 0.75 | 3.31 | 1.00 | 1.44 | 9 |
| 2 1/2 | 7.50 | 5.88 | 4.12 | 8 | 0.88 | 3.94 | 1.12 | 1.62 | 13 |
| 3 | 8.25 | 6.62 | 5.00 | 8 | 0.88 | 4.62 | 1.25 | 1.81 | 16 |
| 3 1/2 | 9.00 | 7.25 | 5.50 | 8 | 1.00 | 5.25 | 1.38 | 1.94 | 21 |
| 4 | 10.00 | 7.88 | 6.19 | 8 | 1.00 | 5.75 | 1.38 | 2.00 | 26 |
| 5 | 11.00 | 9.25 | 7.31 | 8 | 1.00 | 7.00 | 1.50 | 2.12 | 31 |
| 6 | 12.50 | 10.62 | 8.50 | 12 | 1.00 | 8.12 | 1.62 | 2.25 | 44 |
| 8 | 15.00 | 13.00 | 10.62 | 12 | 1.13 | 10.25 | 1.88 | 2.69 | 67 |
| 10 | 17.50 | 15.25 | 12.75 | 16 | 1.25 | 12.62 | 2.12 | 2.88 | 91 |
| 12 | 20.50 | 17.75 | 15.00 | 16 | 1.38 | 14.75 | 2.25 | 3.12 | 130 |
| 14 | 23.00 | 20.25 | 16.25 | 20 | 1.38 | 16.75 | 2.38 | 3.31 | 180 |
| 16 | 25.50 | 22.50 | 18.50 | 20 | 1.50 | 19.00 | 2.50 | 3.69 | 235 |
| 18 | 28.00 | 24.75 | 21.00 | 24 | 1.50 | 21.00 | 2.62 | 3.88 | 285 |
| 20 | 30.50 | 27.00 | 23.00 | 24 | 1.63 | 23.13 | 2.75 | 4.00 | 345 |
| 22 | 33.00 | 29.25 | 25.25 | 24 | 1.75 | 25.25 | 2.88 | 4.25 | 405 |
| 24 | 36.00 | 32.00 | 27.25 | 24 | 1.88 | 27.62 | 3.00 | 4.50 | 510 |
Threaded flanges
Threaded flanges are a commonly used type of flange in industrial applications. Similar to slip-on flanges, threaded flanges have tapered threads designed to connect with pipes that have corresponding external threads. The advantage of these flanges is that they can be connected without welding. Threaded flanges typically feature raised face, flat face, or RTJ (Ring Joint) faces. When a raised face is required for threaded flanges, the standard height for threaded flanges is 1/16″ for flanges rated below Class 400. For threaded flanges rated Class 400 and above, the standard raised face height is 1/4″. The size range of threaded flanges extends from 1/2″ (DN15) to 100″ (DN2500), with varying numbers and diameters of bolt holes, as well as different flange outer diameters, hub diameters, flange thicknesses, and bolt hole diameters.
ANSI B16.5 Forged Flanges FLANGE CLASSES
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About YANHAO
YANHAO is a flange manufacturer located in Hebei Province, China. It is one of the few professional flange suppliers in China.
We have many years of experience in flange production and have multiple flange production lines. We have sufficient stock of raw materials, rich inventory, fast delivery, and can ship within three days. At the same time, the price is affordable. You are welcome to consult and purchase!
In addition, we can provide a variety of bespoke flanges and pipe fittings. Customers can give drawings or samples, and our company will produce them to fit your specific requirements.
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