What is Reducing Flange? Uses, Types and Dimension
Reducing flanges is used in industrial contexts, especially within piping systems. Their primary function is to reduce the diameter of a pipe, facilitating enhanced connections that are both efficient and secure. In this article, we’ll explore the various applications and types of reducing flanges and examine the welding techniques employed to join them together.
What is Reducing Flange?
Reducing flanges are a type of flange used in piping systems to connect two different sizes of pipe. They provide an easy and efficient way to join two pipes of differing diameters and come in a variety of materials and styles to suit specific applications. Reducing flanges enable mechanical strength and tight seals, preventing leaks or malfunctions that could otherwise occur. Most reducing flanges have bolt holes to attach the pipes securely and some even come designed with integral gaskets that make fitting easier while also creating stronger seals. They are used extensively in many industries such as oil, gas, chemical processing as well as plumbing systems. Reducing flanges can be extremely useful for completing certain kinds of projects quickly and easily while ensuring a high-quality result.
Reducing Flange Uses
Reducing flanges finds extensive use across various applications where pipes of different diameters require a connection. They offer a unique advantage, connecting two distinct pipes at angles, a feat often impossible with other flange types. Moreover, their versatility extends to inclusion within larger piping systems featuring diverse sizes and shapes, rendering them invaluable for industrial settings seeking efficient connections among pipes and components.
Reducing Flange Welding
When it comes to welding reducing flanges together, the process is relatively straightforward. First, the two sections must be clamped securely into place, and then the weld is applied using either TIG or MIG welding techniques. The welders should ensure that all edges are clean before beginning the welding process and make sure that no foreign materials enter the weld area during this time. After completing the welding process, any remaining slag should be carefully removed and inspected for any defects or cracks before reassembling and testing the connection.
Reducing Flange Types
There are several different types of reducing flange available on the market today, including slip-on reducing flange (SORF), threaded reducing flange (TRF), socket-welding reducing flange (SWRF), lap joint stub end type (LJSE), blind raised face (BRF) and others. Each type has its own advantages depending on your particular application needs, so it’s important to do some research before selecting one over another.
Reducing Flange Dimension
| NPS | DIAMETER | THICKNESS | DIA. | WELDING | MIN. | MIN. | MIN. | NECK | WELDING | JOINT | ||||
| DN | O | T | A | B | C | D | E | F | G | H | ||||
| 1/2 | 5.25 | 1.19 | 1.38 | 0.88 | .90 | 0.93 | 2.88 | 1.56 | 1.56 | |||||
| 15 | 133 | 30.5 | 34.9 | 22.2 | 22.9 | 23.5 | 73.0 | 40 | 40 | |||||
| 3/4 | 5.50 | 1.25 | 1.69 | 1.09 | 1.11 | 1.14 | 3.12 | 1.69 | 1.69 | |||||
| 20 | 140 | 32.0 | 42.9 | 27.8 | 28.2 | 29.0 | 79.4 | 43 | 43 | |||||
| 1 | 6.25 | 1.38 | 2.00 | 1.36 | 1.38 | 1.41 | 3.50 | 1.88 | 1.88 | |||||
| 25 | 159 | 35.0 | 50.8 | 34.5 | 34.9 | 36.0 | 88.9 | 48 | 48 | |||||
| 1 1/4 | 7.25 | 1.50 | 2.50 | 1.70 | 1.72 | 1.75 | 3.75 | 2.06 | 2.06 | |||||
| 32 | 184 | 38.5 | 63.5 | 43.3 | 43.7 | 44.5 | 95.2 | 52 | 52 | |||||
| 1 1/2 | 8.00 | 1.75 | 2.88 | 1.95 | 1.97 | 1.99 | 4.38 | 2.38 | 2.38 | |||||
| 40 | 203 | 44.5 | 73.0 | 49.6 | 50.0 | 50.5 | 111.4 | 60 | 60 | |||||
| 2 | 9.25 | 2.00 | 3.62 | To be | 2.44 | 2.46 | 2.50 | 5.00 | 2.75 | 2.75 | ||||
| 50 | 235 | 51.0 | 92.1 | 61.9 | 62.5 | 63.5 | 127.0 | 70 | 70 | |||||
| 2 1/2 | 10.50 | 2.25 | 4.12 | specified | 2.94 | 2.97 | 3.00 | 5.62 | 3.12 | 3.12 | ||||
| 65 | 267 | 57.5 | 104.8 | 74.6 | 75.4 | 76 | 142.9 | 79 | 79 | |||||
| 3 | 12.00 | 2.62 | 5.00 | by | 3.57 | 3.60 | 3.63 | 6.62 | 3.62 | 3.62 | ||||
| 80 | 305 | 67.0 | 127.0 | 90.7 | 91.4 | 92 | 168.2 | 92 | 92 | |||||
| 4 | 14.00 | 3.00 | 6.19 | purchaser | 4.57 | 4.60 | 4.63 | 7.50 | 4.25 | 4.25 | ||||
| 100 | 356 | 76.5 | 157.2 | 116.1 | 116.8 | 118 | 190.5 | 108 | 108 | |||||
| 5 | 16.50 | 3.62 | 7.31 | 5.66 | 5.69 | 5.69 | 9.00 | 5.12 | 5.12 | |||||
| 125 | 419 | 92.5 | 185.7 | 143.7 | 144.5 | 145 | 228.6 | 130 | 130 | |||||
| 6 | 19.00 | 4.25 | 8.50 | 6.72 | 6.75 | 6.75 | 10.75 | 6.0 | 6.0 | |||||
| 150 | 483 | 108.0 | 215.9 | 170.7 | 171.4 | 171 | 273.0 | 152 | 152 | |||||
| 8 | 21.75 | 5.00 | 10.62 | 8.72 | 8.75 | 8.75 | 12.50 | 7.0 | 7.0 | |||||
| 200 | 552 | 127.0 | 269.9 | 221.5 | 222.2 | 222 | 317.5 | 178 | 178 | |||||
| 10 | 26.50 | 6.50 | 12.75 | 10.88 | 10.92 | 10.88 | 16.50 | 9.0 | 9.0 | |||||
| 250 | 675 | 165.5 | 323.8 | 276.2 | 277.4 | 276 | 419.4 | 229 | 229 | |||||
| 12 | 30.00 | 7.25 | 15.00 | 12.88 | 12.92 | 12.94 | 18.25 | 10.0 | 10.0 | |||||
| 300 | 760 | 184.5 | 381.0 | 327.0 | 328.2 | 329 | 463.6 | 254 | 254 | |||||
Conclusion
Reducing flanges provide an efficient way to connect pipes with varying diameters in industrial applications such as piping systems. They can also provide an added level of security when connecting two sections at an angle which cannot be achieved using other types of connections. Understanding how they work and what types are available is key to choosing the right option for your application needs. With proper installation techniques, such as welding or clamping in place, these fittings can provide reliable connections for years to come!
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