Orifice flanges play a crucial role in numerous industries by serving as essential pipe fittings. They are utilized to connect pipes, accurately measure flow rates, adjust pressure levels, and regulate temperature within piping systems. This guide aims to provide comprehensive insights into the versatile applications of orifice flanges, including their proper welding procedures and the wide range of options available in today’s market.
What is Orifice Flanges?
Orifice flanges are specialized fittings used in piping systems to measure and control fluid flow. They feature a plate with a hole (orifice) that restricts the flow, allowing for accurate measurement of flow rates. These flanges are crucial in oil and gas, chemical processing, and manufacturing industries, where precise flow control is essential for operational efficiency and safety.
Orifice Flanges Uses
Orifice flanges have a variety of uses depending on what industry they are being used in. Generally speaking, they are used to connect pipes together and measure the flow rate between them. In addition to this basic function, they can also be used to regulate pressure and control temperature within a pipe system. This makes them invaluable for many industrial applications where precision is key.
Orifice Flanges Welding
When welding orifice flanges, following safety procedures and using the correct tools is vital. Typically, an oxy-acetylene torch is the preferred equipment. Also, cleaning the surfaces thoroughly with an abrasive before starting the welding process is crucial to ensure a strong and secure weld.
Orifice Flanges Types
There are several different types of orifice flanges available on the market today, each designed for specific applications and purposes. The most common type is a lap joint flange which consists of two pieces that fit together via bolts or screws. Another popular type is a threaded or socket-welded flange which connects pipes together with screws instead of bolts. Finally, there is also a blind flange that covers openings in pipes without actually connecting them together.
Orifice Flanges Dimension
| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | Hub OD | Weld Neck OD | Welding Neck Length | RF Dia. | RF Height | PCD | Orifice Hole dia | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | G | H | I | ||||||||
| 1 | 25 | 125 | 36.6 | 54 | 33.4 | 81 | 50.8 | 2 | 88.9 | 6.4 | 4 | 5/8 | 125 | 3/4 | M16 | 4.5 |
| 1 1/2 | 40 | 155 | 36.6 | 70 | 48.3 | 84 | 73 | 2 | 114.3 | 6.4 | 4 | 3/4 | 135 | 7/8 | M20 | 6.5 |
| 2 | 50 | 165 | 36.6 | 84 | 60.3 | 84 | 92.1 | 2 | 127 | 6.4 | 8 | 5/8 | 125 | 3/4 | M16 | 7 |
| 2 1/2 | 65 | 190 | 36.6 | 100 | 73 | 87 | 104.8 | 2 | 149.2 | 6.4 | 8 | 3/4 | 135 | 7/8 | M20 | 7.5 |
| 3 | 80 | 210 | 36.6 | 117 | 88.9 | 87 | 127 | 2 | 168.3 | 9.5 | 8 | 3/4 | 135 | 7/8 | M20 | 9.4 |
| 4 | 100 | 255 | 36.6 | 146 | 114.3 | 90 | 157.2 | 2 | 200 | 12.7 | 8 | 3/4 | 135 | 7/8 | M20 | 13.2 |
| 6 | 150 | 320 | 36.6 | 206 | 168.3 | 98 | 215.9 | 2 | 269.9 | 12.7 | 12 | 3/4 | 135 | 7/8 | M20 | 14.6 |
| 8 | 200 | 380 | 39.7 | 260 | 219.1 | 110 | 269.9 | 2 | 330.2 | 12.7 | 12 | 7/8 | 145 | 1 | M24 | 30 |
| 10 | 250 | 445 | 46.1 | 321 | 273 | 116 | 323.8 | 2 | 387.3 | 12.7 | 16 | 1 | 165 | 1 1/8 | M27 | 41 |
| 12 | 300 | 520 | 49.3 | 375 | 323.8 | 129 | 381 | 2 | 450.8 | 12.7 | 16 | 1 1/8 | 180 | 1 1/4 | M30 | 62 |
| 14 | 350 | 585 | 52.4 | 425 | 355.6 | 141 | 412.8 | 2 | 514.4 | 12.7 | 20 | 1 1/8 | 185 | 1 1/4 | M30 | 84 |
| 16 | 400 | 650 | 55.6 | 483 | 406.4 | 144 | 469.9 | 2 | 571.5 | 12.7 | 20 | 1 1/4 | 195 | 1 3/8 | M33 | 111 |
| 18 | 450 | 710 | 58.8 | 533 | 457 | 157 | 533.4 | 2 | 628.6 | 12.7 | 24 | 1 1/4 | 205 | 1 3/8 | M33 | 138 |
| 20 | 500 | 775 | 62 | 587 | 508 | 160 | 584.2 | 2 | 685.8 | 12.7 | 24 | 1 1/4 | 215 | 1 3/8 | M33 | 171 |
| 24 | 600 | 915 | 68.3 | 702 | 610 | 167 | 692.2 | 2 | 812.8 | 12.7 | 24 | 1 1/2 | 240 | 1 5/8 | M39 | 247 |
Conclusion
In conclusion, orifice flanges are essential components for many industrial applications due to their versatility and ability to connect pipes securely while measuring flow rate and regulating pressure/temperature within those systems. In addition, there are several types available on the market today, ranging from lap joint to threaded/socket welded as well as blind varieties, so you can find one that suits your specific needs best! Properly welding these components requires following safety protocols as well as using the correct equipment, such as an oxy-acetylene torch, in order to ensure a secure weld every time. With this comprehensive guide at hand, you now know everything you need about orifice flanges!
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