Flange RF, or Raised Face Flange, is a widely used connection type in industrial piping systems. Its raised face design creates a superior sealing surface, improving gasket compression and preventing leaks under high pressure. This makes it ideal for high-temperature and high-pressure applications where durability and reliability are essential.
The raised face area is precisely machined to ensure optimal gasket seating, enhancing performance and safety in industries such as oil and gas, chemical processing, and power generation.
At Lianhe Valve, we offer a complete range of RF flanges to meet diverse installation and performance needs. Common types include weld neck, slip-on, blind, socket weld, and threaded flanges—each designed for specific connection requirements within industrial systems.
| Type | Description | Typical Application |
|---|---|---|
| Weld Neck RF Flange | Features a long tapered hub for high-stress environments | High-pressure pipelines |
| Slip-On RF Flange | Slides over the pipe for easy alignment and installation | Low-pressure systems |
| Blind RF Flange | Used to close the end of a pipeline or valve | Maintenance and isolation |
| Socket Weld RF Flange | Provides strong and smooth bore connections | Small-diameter, high-pressure lines |
Material options include stainless steel, carbon steel, and alloy steel, ensuring compatibility with a wide range of operating conditions. All products meet international standards such as ANSI, DIN, JIS, and EN for global reliability.
Our RF flanges comply with global standards including ANSI B16.5, DIN, and JIS. Each flange is manufactured with precise dimensional tolerances and pressure ratings from Class 150 to Class 2500.
Raised face height and surface finish are critical for sealing efficiency. Standard raised face heights are 1.6 mm for Class 150 and 300, and 6.4 mm for higher pressure classes. Surface finishes are controlled within Ra 3.2–6.3 μm for optimal gasket performance.
| Standard | Pressure Class | Face Type |
|---|---|---|
| ANSI B16.5 | 150–2500 | Raised Face |
| DIN 2573–2578 | PN6–PN40 | Raised Face |
| JIS B2220 | 5K–40K | Raised Face |
Proper gasket and bolt selection ensures secure joints. These flanges are compatible with graphite, PTFE, and spiral wound gasket materials.
RF flanges are used across industries where reliable, leak-tight connections are essential. Their robust design and corrosion resistance make them suitable for harsh environments and aggressive media.
Oil and gas pipelines
Chemical and petrochemical processing
Water treatment and desalination
Construction and HVAC piping
They integrate seamlessly with stainless steel piping systems and other industrial components, ensuring long service life and consistent performance in both standard and custom installations.
As a professional Flange RF manufacturer, Lianhe Valve (Wenzhou Lianhe Valve Fitting Co., Ltd.) ensures every product meets international quality and safety standards. Our flanges are certified under ISO, CE, and EAC, reflecting our commitment to quality and reliability.
Corrosion-resistant materials for extended service life
High temperature and pressure tolerance
Large stock for prompt delivery
Compliance with ASME, ASTM, and GB/T standards
Based in Wenzhou, China’s industrial hub, we support global supply needs through efficient production and logistics. For updates, visit our Flange RF product news section.
Selecting the right flange involves considering pressure class, temperature range, material compatibility, and connection type. Understanding these factors ensures safe and cost-effective operation.
| Selection Factor | Recommendation |
|---|---|
| Pressure Rating | Choose based on maximum system pressure |
| Material | Use stainless or alloy steel for corrosive media |
| Face Type | Ensure compatibility with gasket and mating flange |
| Standard | Match ANSI, DIN, or JIS standards as per system design |
For complex or custom requirements, our technical team provides expert guidance through our Flange RF selection consultation service.
As a trusted Flange RF supplier, Lianhe Valve welcomes global clients seeking reliable and high-quality flange solutions. Our professional team offers quick quotations, technical support, and customized supply options to meet your project needs.
Contact us today through our Flange RF contact page to request a quote or technical consultation. Explore related stainless steel flange categories to find the ideal match for your piping system.
Q1: What is the main difference between a Flange RF and a flat face flange?
A: The raised face flange has a small elevated area around the bore that improves gasket compression and sealing performance.
Q2: Which standards are your RF flanges manufactured to?
A: Our products comply with ANSI, DIN, JIS, EN, and ASME standards, ensuring global compatibility.
Q3: What materials are available for RF flanges?
A: We offer stainless steel, carbon steel, and alloy steel options based on application needs.
Q4: Can RF flanges be used in high-temperature applications?
A: Yes. Stainless steel and alloy steel RF flanges perform well under high-temperature and high-pressure conditions.
Q5: How can I request a quotation?
A: You can reach us through our website inquiry form or email for a quick quotation and expert technical assistance.
