Raised Face Flanges: Reliable Sealing Solutions for Industrial Piping Systems
Raised Face Flanges (RF Flanges) are the most widely used flange facing type in industrial piping systems. They feature a small raised section around the bore that concentrates gasket pressure, creating a secure, leak-resistant seal under pressure. Raised Face Flanges are suitable for a wide range of applications, including oil & gas, petrochemical, chemical processing, power generation, water treatment, marine, and general industrial piping.
At AstroForge Fitting Industries, we manufacture and supply premium-quality Raised Face Flanges in various materials, pressure classes, and international standards. Our RF Flanges are precision-machined to ensure superior sealing performance, excellent dimensional accuracy, and long service life in demanding operating conditions.
Types of Raised Face Flanges We Offer
- Raised Face Weld Neck Flange: Raised Face Weld Neck Flanges feature a long tapered hub that provides excellent strength and minimizes stress concentration. They are ideal for high-pressure and high-temperature applications.
- Raised Face Slip-On Flange: Raised Face Slip-On Flanges are easy to install and cost-effective. They are welded inside and outside the pipe, making them suitable for low to medium-pressure piping systems.
- Raised Face Blind Flange: Raised Face Blind Flanges are used to seal the end of a pipeline or pressure vessel. Their raised sealing surface ensures effective gasket compression and leak prevention.
- Raised Face Socket Weld Flange: Raised Face Socket Weld Flanges are designed for small-diameter, high-pressure piping systems. They provide a strong, reliable connection through socket welding.
- Raised Face Threaded Flange: Raised Face Threaded Flanges are internally threaded and do not require welding. They are commonly used in low-pressure systems where welding is not practical.
- Raised Face Lap Joint Flange: Raised Face Lap Joint Flanges are used with stub ends and allow easy alignment and dismantling of piping systems that require frequent maintenance.
- Raised Face Plate Flange: Raised Face Plate Flanges are flat circular flanges with a raised sealing face, suitable for general industrial and water pipeline applications.
- Raised Face Reducing Flange: Raised Face Reducing Flanges connect pipes of different diameters while maintaining a secure, leak-proof seal.
Raised Face Flanges Specifications
| Category | Raised Face Flange Specifications |
|---|---|
| Standards | ASME B16.5, ASME B16.47, EN 1092-1, DIN, BS 4504, JIS, IS 6392 |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500, PN6, PN10, PN16, PN25, PN40 |
| Flange Types | Weld Neck, Slip On, Blind, Socket Weld, Threaded, Plate, Lap Joint, Orifice |
| Facing Type | Raised Face (RF) |
| Carbon Steel Grades | ASTM A105, ASTM A350 LF2 |
| Stainless Steel Grades | ASTM A182 F304, F304L, F316, F316L, F321, F347 |
| Alloy Steel Grades | ASTM A182 F11, F22, F5, F9, F91 |
| Other Materials | Duplex Steel, Super Duplex Steel, Monel, Inconel, Hastelloy, Titanium, Alloy 20 |
| Size Range | ½” NB to 60″ NB |
| Dimensions | OD, Bolt Circle Diameter (BCD), Bolt Holes, Bore Diameter, Hub Dimensions, Raised Face Height |
| Surface Finish | 125–250 AARH Serrated Finish, Smooth Finish |
| Testing | PMI, Hydrostatic Test, Ultrasonic Test (UT), Visual Inspection, Dimensional Inspection |
| Certification | EN 10204 3.1 Mill Test Certificate, Third-Party Inspection |
| Applications | Oil & Gas, Petrochemical, Chemical Processing, Power Plants, Water Treatment, Marine, Food Processing, Industrial Piping |
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FAQs - Raised Face flange
A Raised Face (RF) Flange is a type of flange with a small raised section around the bore where the gasket sits. This raised surface increases gasket compression, providing a stronger and more reliable seal for medium- and high-pressure piping systems.
Raised Face Flanges are used to improve sealing performance and reduce the risk of leakage. They are commonly installed in piping systems handling high pressure, high temperatures, and critical industrial fluids.
Raised Face Flanges are manufactured in a variety of materials, including Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel, Super Duplex Steel, Monel, Inconel, Hastelloy, Titanium, and Alloy 20, depending on the application requirements.
Raised Face flanges are available in several types, including Weld Neck, Slip On, Blind, Socket Weld, Threaded, Plate, Lap Joint, and Orifice Flanges.
Raised Face Flanges are commonly manufactured according to ASME B16.5, ASME B16.47, EN 1092-1, DIN, BS 4504, JIS, and IS 6392 standards to ensure dimensional accuracy and compatibility.
Raised Face Flanges are available in various pressure classes, including Class 150, 300, 600, 900, 1500, 2500, as well as PN6, PN10, PN16, PN25, and PN40, depending on the applicable standard.
A Raised Face Flange has a raised sealing surface that compresses the gasket for improved sealing, whereas a Flat Face Flange has a completely flat sealing surface and is generally used in low-pressure applications with cast iron or non-metallic equipment.
Raised Face Flanges are widely used in oil & gas, petrochemical plants, chemical processing, power generation, water treatment, marine industries, food processing, and industrial piping systems.
Raised Face Flanges are compatible with spiral wound gaskets, ring gaskets, compressed fiber gaskets, PTFE gaskets, graphite gaskets, and other gasket types designed for Raised Face sealing surfaces.
AstroForge Fitting Industries manufactures premium-quality Raised Face Flanges with precise machining, excellent dimensional accuracy, and superior corrosion resistance. Our flanges are supplied with EN 10204 3.1 Mill Test Certificates and undergo rigorous quality inspections to ensure reliable performance in demanding industrial applications.