What is carbon steel flange? A carbon steel flange is a robust and versatile pipe fitting used to link pipes, valves, pumps, and other equipment to create a piping system. Made from carbon steel, these flanges offer exceptional strength, durability, and resistance to wear and tear, making them perfect for use in high-pressure and high-temperature environments.
They are available in various types, such as weld neck, slip-on, socket weld, lap joint, and blind flanges, each designed to meet specific requirements and ensure secure and leak-free connections. Carbon steel flanges are extensively utilized in sectors such as oil and gas, petrochemical, and power generation, and construction due to their reliability and cost-effectiveness. Do you want to discover more details about what is carbon steel flange? Let’s Go!
Types Of Carbon Steel Flanges
Weld Neck Flanges
These flanges are known for their long, tapered hub, which provides reinforcement and reduces stress at the base of the flange. Weld neck flanges are ideal for high-pressure and high-temperature applications.
Slip-On Flanges
Easier to align and install, slip-on flanges slide over the pipe and are then welded both inside and outside. They are suitable for lower-pressure applications and provide a cost-effective solution.
Socket Weld Flanges
Designed for small-diameter high-pressure pipes, socket weld flanges have a socket in which the pipe is fitted and then fillet welded. This type provides a smooth bore and better fluid flow.
Lap Joint Flanges
Used with a stub end, lap joint flanges are not welded directly to the pipe, which allows for easy disassembly and alignment. They are often used in systems that require frequent dismantling.
Blind Flanges
These are used to close the ends of piping systems, valves, or pressure vessel openings. Blind flanges can handle high pressure and are available in various pressure ratings and sizes.
Threaded Flanges
Also known as screwed flanges, these are used for small-diameter piping systems. They are screwed onto the pipe and can be used without welding, making them ideal for low-pressure applications.
What Is Carbon Steel Flange Standards
ASME standards, such as ASME B16.5, ASME B16.47, and ASME B16.48, provide guidelines for the dimensions, materials, and pressure ratings of carbon steel flanges.
API standards, such as API 6A and API 6B, specify requirements for flanges used in the oil and gas industry.
ISO standards, such as ISO 7005, provide guidelines for the dimensions, materials, and testing of carbon steel flanges.
What Is Carbon Steel Flange Dimensions
Key Dimensional Parameters
- Bolt Circle Diameter (BCD)
- Bolt Hole Diameter (H)
- Flange Thickness (t)
The bolt circle diameter is the distance across the circle created by the centers of the bolt holes. This dimension is crucial for ensuring that flanges can be bolted together correctly.
The diameter of the individual bolt holes in the flange. This dimension must match the bolt size used for securing the flange.
This is the thickness of the flange material. Thicker flanges are used for higher pressure applications to provide the necessary strength.
Standard Dimensions For Different Flange Types
Weld Neck Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) | Hub Diameter (B) | Raised Face Height (RF) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 | 0.88 | 0.06 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 | 1.25 | 0.06 |
2 | 6 | 5 | 4 | 0.75 | 0.69 | 2.13 | 0.06 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 | 4.25 | 0.06 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 | 6.5 | 0.06 |
Slip-On Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) | Raised Face Height (RF) | Bore Diameter (B) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 | 0.06 | 0.63 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 | 0.06 | 1.05 |
2 | 6 | 5 | 4 | 0.75 | 0.69 | 0.06 | 2.07 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 | 0.06 | 4.07 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 | 0.06 | 6.07 |
Blind Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 |
2 | 6 | 5 | 4 | 0.75 | 0.69 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 |
Socket Weld Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) | Bore Diameter (B) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 | 0.63 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 | 1.05 |
2 | 6 | 5 | 4 | 0.75 | 0.69 | 2.07 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 | 4.07 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 | 6.07 |
Lap Joint Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 |
2 | 6 | 5 | 4 | 0.75 | 0.69 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 |
Threaded Flange Dimensions
Nominal Pipe Size (NPS) | Outside Diameter (D) | Bolt Circle Diameter (BCD) | Number of Bolt Holes (n) | Bolt Hole Diameter (H) | Flange Thickness (t) | Thread Diameter (TD) |
1/2 | 3.5 | 2.38 | 4 | 0.63 | 0.44 | 0.63 |
1 | 4.25 | 3.13 | 4 | 0.63 | 0.56 | 1.05 |
2 | 6 | 5 | 4 | 0.75 | 0.69 | 2.07 |
4 | 9 | 7.5 | 8 | 0.75 | 0.94 | 4.07 |
6 | 11 | 9.5 | 8 | 0.88 | 1.06 | 6.07 |
Elite Piping Manufacture Co., Ltd. provides a comprehensive understanding of what a carbon steel flange is by delivering top-quality products that exemplify the characteristics and benefits of carbon steel flanges. What is carbon steel flange? It is a crucial component used in piping systems, known for its strength, durability, and ability to handle high pressures and temperatures.
At Elite Piping, what is carbon steel flange is more than just a definition—it represents our commitment to excellence in manufacturing flanges that meet rigorous standards. By focusing on what is carbon steel flange, our company ensures that each product aligns with industry requirements, providing reliable and effective solutions for various applications. What is carbon steel flange, in essence, is embodied in the high-quality, precisely engineered flanges offered by Elite Piping Manufacture Co., Ltd.
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