RTJ flanges use a metal ring gasket in a machined groove to ensure high-pressure, leak-tight seals.
Sizes: ½” to 24”, pressure ratings 300# to 2500#. Standards: ASME B16.5, API 6A. Materials: ASTM A182 F316, A105, and duplex steel. Used with R-type or RX ring gaskets. Compatible with weld neck and blind flanges.
| Specification | Description |
Product Name | Ring Type Joint Flange (RTJ) |
Size Range | ½” to 24” |
Pressure Rating | 300# to 2500# |
Standard Compliance | ASME B16.5, API 6A |
Materials | ASTM A182 F316, A105 Carbon Steel, Duplex Steel |
Gasket Type | R-type or RX ring gaskets |
Compatible Flange Types | Weld Neck, Blind |
Connection | Welded |
Temperature Range | Depends on material and service conditions |
Face Type | Ring Type Joint groove |
Surface Finish | Machined as per standard |
Testing | Hydrostatic testing; NDT on request |
Certification | Material Test Reports (MTR); third-party inspection optional |
Applications | Oil & gas, high-pressure piping systems, refineries, petrochemical plants |
Customization | Sizes, materials, and pressure ratings to customer requirements |
RTJ flanges are designed for high-pressure and high-temperature environments and are used with R-type or RX ring gaskets for metal-to-metal sealing.

The Ring Type Joint Flange (RTJ) is a precision-engineered pipe flange designed for high-pressure and high-temperature applications. The RTJ flange features a specially machined groove that accommodates a metal ring gasket, ensuring a tight and leak-proof seal under extreme conditions. This makes the Ring Type Joint Flange the preferred choice in the oil & gas, petrochemical, and offshore industries, where sealing integrity is critical.
We supply Ring Type Joint Flanges manufactured from premium stainless steel and nickel alloy materials. These materials provide outstanding resistance to corrosion, oxidation, and thermal stress. Whether you require a stainless steel RTJ flange for chemical processing systems or a nickel alloy RTJ flange for sour gas environments, we offer dependable solutions tailored to your specifications.
Our RTJ flanges conform to global standards such as ASME B16.5, API 6A, and MSS-SP-44, ensuring compatibility and safety in demanding installations. They are available in a wide range of sizes and pressure classes, typically from Class 150 to Class 2500, to suit the most rigorous project requirements.
Choosing our Ring Type Joint Flange means you’re selecting a product built for precision, strength, and long-term durability. Our RTJ flanges are widely recognized for their sealing performance, especially in pipelines transporting hazardous or high-pressure media. Trust our stainless steel and nickel alloy Ring Type Joint Flanges for your critical operations.