R (Octagonal) Ring Gasket
| Standard Materials | Exotic Materials | Coating & Plating Options |
|---|---|---|
| Low Carbon Steel | Stainless Steel | White Zinc |
| SS316 | Duplex Stainless Steel | Yellow Zinc |
| Soft Iron | Inconel | PTFE |
| Monel | Cadmium | |
| Titanium | Silver | |
| Xylan | ||
| Rubber Coating |
R Octagonal Ring Gasket is a precision-machined metallic sealing solution designed for high-pressure and high-temperature Ring Type Joint (RTJ) flange connections. Manufactured in accordance with API 6A and ASME B16.20 standards, these gaskets provide dependable metal-to-metal sealing performance in critical industrial applications. The octagonal cross-sectional design creates a larger sealing contact area compared to conventional profiles, making it suitable for demanding operating environments where leakage prevention is essential. Widely used as a wellhead ring gasket, the R Octagonal Ring Gasket is commonly installed in wellhead equipment, valves, pressure vessels, and pipeline systems across the oil and gas, petrochemical, refining, and process industries.
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The R Octagonal Ring Gasket is a solid metallic RTJ gasket engineered to fit precision‑machined R‑type ring grooves in ASME B16.5 and API 6A Type 6B flanges. During installation, the gasket is compressed between the mating ring grooves, creating a reliable metal‑to‑metal seal capable of withstanding high pressures and elevated temperatures.
As one of the most widely used ring joint gasket profiles, the octagonal design provides improved sealing efficiency through increased contact area within the groove. This geometry enhances gasket performance in critical applications where operational reliability and sealing integrity are essential.
Available in multiple material grades, R‑type octagonal gaskets can be selected to meet specific service conditions, media compatibility requirements, and pressure ratings.
- Octagonal cross-sectional design for enhanced sealing performance
- Suitable for high-pressure applications up to 5000 PSI and high-temperature service conditions depending on the material selection conditions
- Manufactured to API 6A and ASME B16.20 requirements
- Reliable metal-to-metal sealing capability
- Available in a wide range of metallic materials
- Suitable for critical wellhead and pressure-containing applications
- Resistant to demanding operating environments
Material Options
R Octagonal Ring Gaskets are available in various metallic materials to accommodate different operating conditions and media requirements.
Soft Iron
Commonly used for carbon steel flanges in standard oil and gas applications where excellent seating characteristics are required.
Low Carbon Steel
Suitable for general industrial services operating under controlled process conditions.
Stainless Steel (304,316)
Provides improved corrosion resistance for petrochemical plants, offshore facilities, chemical processing, and marine environments.
Duplex Stainless Steel
Offers enhanced strength and resistance to chloride-induced corrosion, making it suitable for aggressive offshore applications.
Inconel
Ideal for high-temperature service and aggressive chemical environments requiring superior oxidation resistance.
Monel 400
Widely selected for seawater service, marine applications, and hydrofluoric acid environments.
Material selection should be based on operating pressure, temperature, corrosion resistance requirements, and compatibility with the mating flange material. Stainless steel and nickel-based alloys are commonly selected for corrosive and high-temperature environments, while soft iron remains a preferred option for many standard sealing applications.
Applications
Wellhead Equipment
Commonly used as a wellhead ring gasket to maintain reliable sealing performance in high-pressure drilling and production systems.
RTJ Flange Connections
Designed for Ring Type Joint flange assemblies where metal-to-metal sealing is required.
High-Pressure Valves
Suitable for valve systems operating under elevated pressures and temperatures.
Pressure Vessels
Provides dependable sealing for pressure-containing equipment used in industrial processing facilities.
Choke and Kill Manifolds
Used in critical oilfield systems where sealing integrity is essential for safe operation.
Pipeline Systems
Supports leak-resistant sealing in oil, gas, and process fluid transportation systems.
Frequently asked questions
An R Octagonal Ring Gasket is a solid metallic RTJ gasket with an octagonal cross-section designed to create a metal-to-metal seal in high-pressure flange connections.
R Octagonal Ring Gaskets are typically manufactured according to API 6A or ASME B16.20 standards, ensuring dimensional accuracy and sealing reliability.
Available materials include Soft Iron, Carbon Steel, Stainless Steel 304, Stainless Steel 316, Duplex Stainless Steel, Inconel, and Monel alloys.
The octagonal design provides a larger sealing contact area than traditional profiles, improving sealing efficiency in high-pressure service conditions.
Yes. Depending on the selected material grade, these gaskets can perform effectively in elevated temperature environments commonly found in industrial process systems.
Yes. Material grades, dimensions, and specifications can be manufactured according to project requirements and applicable industry standards.
R-Octagonal and R-Oval gaskets of the same ring number share the same ring dimensions. Oval rings suit both flat-bottom and round-bottom grooves; octagonal rings must be used only in flat-bottom grooves.
These gaskets are commonly used in wellhead equipment, high-pressure valves, pressure vessels, choke and kill manifolds, and pipeline systems requiring reliable sealing performance.
