Kolkata Pipe Fittings, a one of the former carbon steel flange manufacturers, suppliers, dealers, stockists and traders in Kolkata, West Bengal. We are providing the high quality of pure form of carbon steel flanges which is a piping component and made form carbon steel.
These are used for connecting pipes, valves and other types of equipment within a system by creating a sealed connection with a raised face. These CS flanges acts as a strong and durable joint to facilitate smooth fluid flow in various types of industrial sectors. Because of its structure, it is used in oil and gas industry and chemical processing industries.
Our Multiple Types of Carbon Steel Flanges
Being the former CS flanges manufacturers and suppliers in Kolkata, we are offering various types of carbon steel flanges with multiple types of features installed inside. Here, we have listed down some types such as:
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Weld Neck Flanges: These weld flanges are used formally in chemical, petroleum and power industrial sectors because of its higher strength. These are designed with a long neck that helps for distributing stress more evenly around the pipe. Due to the high quality of materials has been used in CS flanges, it is used in critical applications for improving performance.
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Slip-On Flanges (SO): These SO flanges has the simpler design and flange is slipped over the pipe and then welded in place from both the sides, inside and outside. Because of their structure, these are easier to install and highly cost effective as compared to weld neck flanges. Our flanges area used in medium pressure applications in various types of industrial sectors such as oil and gas, HVAC and water supply applications.
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Threaded Flanges (TH): Our TH flanges are used where welding is not possible or practical and these flanges has internal thread and allows them to be screwed onto pipe. These are ideal for using them into small scale industrial sectors or pipeline structure. As compared to other CS flanges, these are more feasible and able to install into compact places.
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Socket Weld Flanges (SW): These socket weld flanges are specially designed for using in high pressure handling industrial sectors such as power generation industries and chemical industries. It has small diameter, strong and leak-proof connections as well. These socket weld flanges allows the pipe to be inserted into the flanges and then welded.
Technical Specifications of Our Carbon Steel Flanges
Below, we have mentioned a technical sheet of our CS Flanges that can gives more detailed information about these flanges for improving your performance such as:
| Parameter |
Weld Neck Flanges (WN) |
Slip-On Flanges (SO) |
Threaded Flanges (TH) |
Socket Weld Flanges (SW) |
| Material Grades |
ASTM A105, A350 LF2, A694 F52/F60/F65 |
ASTM A105, A350 LF2 |
ASTM A105, A350 LF2 |
ASTM A105, A350 LF2 |
| Size Range (in.) |
½” – 48” |
½” – 60” |
½” – 24” |
½” – 4” |
| Nominal Pipe Sizes (NPS) |
½” – 48” |
½” – 60” |
½” – 24” |
½” – 4” |
| Pressure Ratings (Class) |
150, 300, 600, 900, 1500, 2500 |
150, 300, 600, 900 |
150, 300, 600 |
150, 300, 600 |
| Operating Temperature Range (°C) |
-50 to 600 |
-50 to 450 |
-50 to 450 |
-50 to 500 |
| Wall Thickness (mm) |
3 – 60 |
3 – 50 |
3 – 25 |
3 – 25 |
| Bore Diameter (mm) |
15 – 1200 |
15 – 1500 |
15 – 600 |
15 – 200 |
| Face Type |
RF, FF, RTJ |
RF, FF, RTJ |
RF, FF |
RF, FF |
| Bolt Hole Count (Typical) |
4 – 48 |
4 – 48 |
4 – 32 |
4 – 24 |
| Bolt Hole Diameter (mm) |
10 – 60 |
10 – 80 |
10 – 50 |
10 – 40 |
| Gasket Thickness (mm) |
1.5 – 5 |
1.5 – 5 |
1.5 – 3 |
1.5 – 3 |
| Flange Thickness (mm) |
10 – 250 |
10 – 200 |
10 – 100 |
10 – 100 |
| Raised Face Height (mm) |
1.6 – 7.0 |
1.6 – 7.0 |
1.6 – 3.2 |
1.6 – 3.2 |
| Weight Range (kg) |
0.5 – 800 |
0.5 – 700 |
0.5 – 300 |
0.5 – 100 |
| Common Coating Types |
Black Paint, Anti-Rust Oil, Hot-Dip Galvanized |
Black Paint, Anti-Rust Oil |
Black Paint, Anti-Rust Oil |
Black Paint, Anti-Rust Oil |
Important Features and Benefits of Using Our Carbon Steel Flanges
Being the former CS flanges stockists and traders in Kolkata, our all types of flanges are highly used in multiple types of sectors due to its advanced features installed in it such as;
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Ease of machining: As compared to other types of metals, these carbon steel flanges are easy to machine and shapes and allows for applying in any kind of industrial sectors. This metal is more flexible and to convert them into intricate designs with precise customization methods.
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Leak Proof Connections: The multiple types of CS Flanges can be welded with precise manufacturing and proper installation methods. This can gives tight and leak proof connections as well and prevents any kind of fluid or gas leaks for ensuring efficient and safe pipeline operations.
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Compatibility with Various Pipe Material: These carbon steel materials are highly compatible with other types of materials such as aluminium, stainless steel and cast iron also with the right gaskets and coatings. The flexibility of the carbon steel flanges makes them more practical choice for diverse types of industries.
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Supports High Pressure Ratings: Designed for high-pressure environments, carbon steel flanges can handle extreme pressures without deformation. This makes them ideal for oil refineries, power plants, and chemical processing units.
Applications of Our Carbon Steel Flanges
One of the former carbon steel flanges manufacturers and suppliers in Kolkata, these all types of flanges are highly used in multiple types of industries such as:
- Oil and gas pipeline connection and distribution
- Petrochemical processing and high-pressure fluid transport
- Power plants steam and heat exchanger applications
- Industrial water treatment and chemical processing plants
- Shipbuilding marine engineering and offshore platform construction
- Construction structural support and heavy machinery assembly
- Food processing high-pressure piping and sanitary systems
- HVAC refrigeration and industrial cooling system installations
- Automotive exhaust systems and engine component manufacturing
- Fire protection sprinkler and emergency water supply systems
Why Choose Us?
At Kolkata Pipe Fittings, we are a trusted carbon steel flange manufacturers, suppliers, stockists, and traders in Kolkata, offering high-quality CS flanges for diverse industrial applications. Our flanges ensure strong, leak-proof connections in oil & gas, petrochemical, power plants, water treatment, construction, and more.
- Premium Quality – Manufactured from top-grade ASTM A105, A350, A694 carbon steel.
- Wide Range – We offer Weld Neck, Slip-On, Threaded, and Socket Weld Flanges.
- High Durability – Designed to handle high pressure & extreme temperatures.
- Leak-Proof & Corrosion-Resistant – Ensures long-lasting and secure pipeline connections.
- Industry Standards Compliance – ASME B16.5, ASME B16.47, API 605 certified.
- On-Time Delivery – Bulk availability with fast and reliable supply across India.
One of the leading carbon steel flanges manufacturers, suppliers, dealers, stockists and traders in Kolkata, we as Kolkata Pipe Fittings are providing the best quality of CS flanges which is used for connecting the pipe equipment into proper manner. It can maintain smooth flow of the fluids in the compact and longer pipeline network systems for increasing the performance. For more information about our carbon steel flanges, contact us today!
