ANSI RF Flanges

Engineered for High-Integrity Industrial Piping Systems

ANSI RF (Raised Face) Flanges are manufactured in accordance with ASME/ANSI B16.5 standards and are among the most widely used flange types in industrial piping systems. Featuring a raised sealing surface, these flanges provide increased gasket compression, creating a secure and leak-resistant connection under a wide range of pressure and temperature conditions. They are suitable for pipelines carrying liquids, gases, steam, petroleum products, and corrosive chemicals, making them an essential component in numerous industrial sectors.

Premium Materials and Precision Manufacturing

Our ANSI RF Flanges are produced from high-quality carbon steel, stainless steel, alloy steel, duplex stainless steel, and other specialized materials to meet diverse application requirements. Advanced forging processes, precision CNC machining, controlled heat treatment, and strict dimensional inspections ensure excellent mechanical strength, accurate tolerances, and outstanding surface quality. Every flange is manufactured in full compliance with ASME/ANSI B16.5 specifications, ensuring reliable compatibility with standard piping components.

Superior Sealing Performance and Mechanical Strength

The raised face design concentrates bolt loading on the gasket area, allowing ANSI RF Flanges to achieve superior sealing efficiency compared to flat-face flanges. This design minimizes leakage risks while maintaining reliable performance under high pressure, elevated temperatures, and cyclic operating conditions. Combined with the appropriate gasket material, RF flanges provide excellent resistance to vibration, thermal expansion, and mechanical stress, ensuring long-term operational safety and durability.

Wide Range of Sizes and Pressure Classes

Our ANSI RF Flanges are available in sizes from 1/2 inch to 24 inches, with larger sizes available upon request. Pressure ratings include Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, and Class 2500, enabling them to meet the demands of both standard and high-pressure applications. Various bore configurations, flange thicknesses, and customized machining options are available to suit specific engineering requirements.

Broad Industrial Applications

ANSI RF Flanges are extensively used in oil and gas production, petrochemical plants, chemical processing facilities, refineries, power generation stations, offshore platforms, water treatment systems, marine engineering, pulp and paper mills, mining operations, pharmaceutical manufacturing, and general industrial piping networks. Their reliable sealing capability makes them ideal for both process piping and critical pressure-containing systems.

Comprehensive Quality Assurance

Every ANSI RF Flange undergoes rigorous quality control throughout the manufacturing process. Chemical composition analysis, mechanical property testing, dimensional inspection, hardness testing, non-destructive testing (NDT), surface examination, and visual inspection are performed to ensure compliance with international standards and customer specifications. Additional testing, including ultrasonic testing, magnetic particle inspection, and third-party certification, can be provided upon request to satisfy project-specific requirements.

OEM Solutions and Worldwide Supply

We offer OEM and customized manufacturing services for EPC contractors, distributors, wholesalers, and industrial end users around the world. Customized materials, pressure classes, special machining, anti-corrosion coatings, laser marking, packaging, and inspection documentation are available according to customer specifications. Supported by advanced manufacturing facilities, experienced engineering teams, and efficient global logistics, we deliver high-quality ANSI RF Flanges with consistent performance, reliable quality, and on-time delivery for industrial projects worldwide.