Stainless Steel Ring Type Joint Flanges

Stainless Steel Ring Type Joint Flanges provide a reliable, leak-proof solution for industries that demand superior performance under extreme conditions. Available in a wide range of materials and grades, they offer the ideal combination of strength, corrosion resistance, and longevity. 

Stainless Steel Ring Type Joint (RTJ) Flanges are specialized flanges designed for high-pressure and high-temperature applications where leak-proof sealing is essential. Widely used in oil & gas, petrochemical, power generation, and offshore industries, these flanges provide superior strength, durability, and reliability. They use a precision-machined metallic ring gasket that fits into a hexagonal or oval groove, creating a metal-to-metal seal that can withstand extreme operating conditions.

Types of Stainless Steel Ring Type Joint Flanges

Stainless steel RTJ flanges are available in various configurations to meet different piping and operational needs:

• Weld Neck RTJ Flanges – Designed for critical services where strength and leak resistance are paramount.
• Blind RTJ Flanges – Used to close the ends of piping systems while maintaining a secure seal.
• Slip-On RTJ Flanges – Easy to install and align; suitable for low-pressure applications.
• Lap Joint RTJ Flanges – Ideal for systems requiring frequent dismantling and inspection.
• Threaded RTJ Flanges – Suitable for small-diameter high-pressure systems where welding is impractical.

Material Grades of Stainless Steel RTJ Flanges

Stainless steel RTJ flanges are manufactured in multiple grades to meet diverse industry requirements:

• Austenitic Grades: SS 304, 304L, 304H, SS 316, 316L, 316H, 321, 347
• Duplex and Super Duplex: UNS S31803, S32205, S32750, S32760
• Precipitation Hardening Grades: 17-4 PH
• Martensitic Grades: SS 410, 420, 431
• High-Temperature Grades: SS 310, 310S
• Special Alloys: SS 904L, Alloy 20, and other custom stainless steels

These grades are selected based on specific environmental conditions such as pressure, temperature, and corrosive nature of the media.

Applications of Stainless Steel Ring Type Joint Flanges

• Oil & Gas exploration and transportation pipelines
• Offshore and subsea installations
• Petrochemical and chemical processing plants
• High-pressure steam and power generation systems
• Shipbuilding and marine engineering
• Refineries and process industries

Manufacturing and Quality Assurance

High-quality stainless steel RTJ flanges are produced through precision forging, CNC machining, and stringent inspection processes. Each flange undergoes non-destructive testing (NDT), dimensional checks, and pressure testing to ensure it meets the required specifications. Leading manufacturers also offer customized RTJ flanges in different sizes, pressure ratings, and face types.

Selecting the Right RTJ Flange

When choosing stainless steel ring type joint flanges, consider factors such as:

• Operating pressure and temperature
• Media type and corrosiveness
• Piping material and compatibility
• Applicable standards (ASME, ANSI, API, etc.)
• Required size and pressure class (Class 150 to 2500 and higher)