A small leak in a high-pressure line is never small. It can mean lost product, unplanned shutdowns, and real safety risk. Soft gaskets often struggle as pressure and temperature climb, exactly when a flange joint needs the most confidence.
R Octagonal Ring Gasket is engineered for dependable sealing in demanding industrial environments. This gasket fits compatible RTJ flange grooves. It delivers reliable metal-to-metal sealing in high pressure and high temperatures. This gasket is best suited for the Oil, Gas, Petrochemical, and process industries.
Overview of R (Octagonal) Ring Gasket
The R Octagonal Ring Gasket is a precision-machined metallic Ring Type Joint (RTJ) gasket, also known as an Octagonal Ring Joint Gasket. It is manufactured in accordance with applicable API 6A and ASME B16.20 requirements, including dimensions, tolerances, materials, and marking.
The R-Type Octagonal Ring Gasket features an octagonal cross-section and 23° angled sealing faces, designed to seat within compatible R-type ring grooves. Once the flanges are bolted together, the ring is compressed between them to create a dependable metal-to-metal seal.
Available in sizes ranging from R11 to R105, the R Octagonal Ring Gasket is selected to suit specific flange dimensions, pressure ratings, and groove configurations. A range of metallic materials supports different operating temperatures, process media, corrosion requirements, and application needs.
Key Features
Precision-machined octagonal profile
Consistent geometry supports predictable contact and repeatable seating inside the groove.
23° angled sealing faces
The angled faces bear against the groove walls, helping the joint maintain sealing contact under load.
Metal-to-metal sealing
The hard metallic construction delivers dependable metal-to-metal sealing in demanding operating conditions.
High-pressure and high-temperature suitability
Designed for reliable sealing within specified pressure and temperature limits.
R-type groove compatibility
Manufactured as an R-type octagonal ring gasket for compatible R-type RTJ flange grooves.
Sizes R11 to R105
A wide standard range covers many flange sizes and pressure classes.
Critical-service ready
Suited to oil, gas, petrochemical, and industrial process systems where sealing reliability is essential.
Coating and Plating Options
| Coating / Plating | Purpose |
|---|---|
| White Zinc | Offers basic corrosion protection during storage and general use. |
| Yellow Zinc | Provides improved surface protection and easy identification. |
| PTFE | Reduces surface friction when compatible with operating conditions and process media. |
| Cadmium | Provides corrosion resistance and a smoother installation surface; availability may be limited by environmental, health, or project-specification requirements |
| Silver | Helps prevent galling in high-temperature and critical-service applications. |
| Xylan | Provides a low-friction, chemical-resistant finish |
| Rubber Coating | Helps protect against moisture and damage from handling. |
Confirm the final coating selection against the operating environment, process media, temperature range, and project specification.
Material Options
| Material | Typical Use |
|---|---|
| Soft Iron | Ideal for general use. Corrosion resistance is less important. |
| Low Carbon Steel | General oil, gas, and process service where moderate corrosion resistance is required |
| Stainless Steel 304 | General industrial and mildly corrosive service |
| Stainless Steel 316 | Improved corrosion resistance for chemical and chloride-containing environments |
| Duplex Stainless Steel | High-strength applications. It requires better resistance to chloride corrosion. |
| Inconel | High-temperature and aggressive service, subject to flange hardness compatibility |
| Monel 400 | Seawater, offshore, and selected chemical service; confirm compatibility with the specific media |
| Titanium | For selected highly corrosive services; confirm availability and compatibility with the process media and flange-groove hardness. |
The gasket material should be softer than the flange material so that the ring deforms during assembly rather than damaging the flange groove. Material options depend on the size and specifications.
Applications
Wellhead equipment
Supports dependable sealing in high-pressure wellsite connections.
RTJ flange connections
An octagonal ring joint gasket seats within machined ring grooves to create a firm metal-to-metal seal.
High-pressure valves
Helps maintain sealing integrity around valve bodies and bonnets under pressure and temperature variations.
Pressure vessels
Supports containment at nozzle and manway joints in suitable high-pressure systems.
Choke and kill manifolds
Made for well-control equipment that needs a tight, reliable seal.
Oil and gas pipeline systems
Ensure reliable sealing in compatible pipeline flange connections.
Petrochemical and refining facilities
Made for tough working conditions with the right materials.
Industrial process systems
Support leak-resistant performance in demanding process lines.
Why Clarion
Sealing components are only as good as the care behind them. At Clarion, we machine every R Octagonal Ring Gasket with close attention to profile, finish, and dimensional accuracy, so it performs the way your joint was designed to.
Our R Octagonal Ring Gaskets are manufactured to meet applicable API 6A and ASME B16.20 requirements. With suitable material and coating options, they deliver reliable sealing performance across demanding industrial applications.
Looking for an R (Octagonal) Ring Gasket Supplier in Houston and Texas?
Tell us what your project needs, and we'll help you match the right R Octagonal Ring Gasket. Need ring gaskets in Texas for a wellsite job or a plant shutdown?
Please include:
- Your drawing or sketch
- Ring style and number, for example, R octagonal, RX, or BX
- Material grade
- Applicable standard: ASME B16.20 or API 6A
- Coating or plating requirement
- Flange type and pressure class
- Operating temperature and pressure conditions
- Quantity and delivery timeline
- Required material test reports and inspection documentation
Don't have the full details yet? Send what you have, and we'll help you find the right fit.
Get Your R (Octagonal) Ring Gasket QuoteFrequently Asked Questions
Can an R Octagonal Ring Gasket be reused after removal?
No. The ring deforms under compression, so reusing it can compromise sealing performance. Always install a new gasket.
Can an octagonal ring be replaced with an oval ring?
Oval and octagonal R-type rings can be interchangeable in compatible modern flat-bottom grooves when the ring number and other requirements match. Older round-bottom grooves accept oval rings only. Confirm the groove design and project specification before substitution.
Why should an R Octagonal Ring Gasket be softer than the flange?
A softer ring deforms instead of the flange groove, helping protect the flange faces from permanent damage during assembly.
How should an R Octagonal Ring Gasket be stored before installation?
Keep it clean, dry, and in protective packaging to keep the sealing faces free of scratches, dents, and corrosion.
What should be inspected before fitting an R Octagonal Ring Gasket?
Check the sealing faces for scratches, dents, burrs, corrosion, or other damage. Damaged rings should be rejected rather than installed.
How should flange bolts be tightened after placing the ring?
Tighten the bolts gradually in a cross pattern so the flanges close evenly. Always follow the approved torque procedure and applicable project requirements.