Introduction
Carbon steel (CS) flanges are widely used in piping systems across industries. Among the many types, the CS SORF Flange stands out for its strength, reliability, and affordability. SORF means Slip-On Raised Face, a flange type designed for easy installation and excellent sealing.
At Fortis Forge, we specialize in manufacturing premium-quality CS SORF flanges that meet global standards. This blog explores their features, benefits, applications, and technical aspects in detail.
What is a CS SORF Flange?
A CS SORF Flange is a Slip-On Raised Face flange made of carbon steel. It is slipped over the pipe and then welded, ensuring a strong connection.
The “raised face” design increases pressure containment. This feature enhances the flange’s ability to maintain tight seals in critical operations.
Key Features:
Manufactured from durable carbon steel.
Designed for low-pressure to medium-pressure systems.
Raised face for secure sealing.
Cost-effective and easy to install.

Manufacturing Standards at Fortis Forge
At Fortis Forge, we follow strict quality protocols. Our CS SORF flanges are produced using advanced forging and machining techniques.
Standards we comply with:
ASME/ANSI B16.5
DIN
BS EN
ISO
Each flange undergoes rigorous testing for strength, accuracy, and finish.
Advantages of CS SORF Flanges
1. Easy Installation
Slip-on flanges are simpler to install than weld neck flanges. They require less precision in cutting pipe lengths.
2. Cost-Effective
CS SORF flanges are economical due to their reduced welding needs and lower material costs.
3. Versatile Applications
They work well in water supply, oil, gas, and chemical industries.
4. Strong Sealing
The raised face design improves gasket performance, reducing leakage risks.
5. Durability
Carbon steel offers excellent strength, impact resistance, and toughness

Applications of CS SORF Flanges
CS SORF flanges are used in a wide range of sectors.
Oil and Gas: For connecting pipelines carrying crude oil, natural gas, and derivatives.
Petrochemical Plants: Used in systems handling chemicals and gases.
Water Treatment Plants: Perfect for water supply and distribution networks.
Power Generation: Used in boilers, turbines, and condensers.
Shipbuilding: For piping systems in marine vessels.

Why Choose Fortis Forge for CS SORF Flanges?
Premium Material Quality: Only certified carbon steel is used.
Customization: We provide flanges in different sizes, pressure classes, and finishes.
Competitive Pricing: Affordability without compromising quality.
Global Reach: Supplied to clients in Asia, Europe, and the Middle East.
After-Sales Support: Our technical team assists with installation and maintenance queries.
Technical Specifications of CS SORF Flanges
Material: Carbon Steel (ASTM A105 / A350 LF2, etc.)
Sizes: ½” to 48”
Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500
Facing Type: Raised Face (RF)
End Connection: Slip-On Welding
Installation Process of CS SORF Flange
Prepare the Pipe End: Cut and clean the pipe surface.
Slip the Flange Over Pipe: Insert pipe through the bore of the flange.
Position Properly: Adjust the length to ensure correct placement.
Weld the Flange: Perform fillet weld on both inner and outer sides.
Attach Gasket: Place gasket on raised face for sealing.
Tighten Bolts: Fix flange with bolts and nuts evenly.

Maintenance Tips for CS SORF Flanges
Inspect regularly for corrosion or leaks.
Replace damaged gaskets immediately.
Lubricate bolts to prevent seizing.
Use protective coatings in corrosive environments.
Conclusion
The CS SORF Flange is a practical and cost-effective solution for diverse industries. Its ease of installation, durability, and secure sealing make it highly valuable in modern piping systems.
At Fortis Forge, we provide top-grade CS SORF flanges that deliver unmatched performance. With strict adherence to international standards, we ensure our products help industries operate safely and efficiently.
If you need reliable CS SORF flanges, Fortis Forge is your trusted partner.