Oval Ring Joint Gasket – a traditional and reliable metal sealing solution with a circular cross-section, specifically designed for round-bottom flange grooves. As the original RTJ gasket design, oval ring gaskets provide dependable sealing performance in moderate to high-pressure applications and are fully interchangeable with octagonal gaskets in modern flat-bottom grooves. As a leading China oval ring joint gasket manufacturer, Kaxite supplies these gaskets in a wide spectrum of materials – from soft iron and carbon steel to stainless steels (304/316/347/410), nickel alloys (Inconel, Incoloy, Monel), and specialty alloys (Hastelloy, Titanium, Zirconium) – meeting ASME B16.20, API 6A, and other international standards.
An oval ring joint gasket is a solid metal sealing ring with a circular (oval) cross-section, designed specifically for use in round-bottom flange grooves. It seals by line contact between the gasket and the groove under compressive load, creating a reliable metal-to-metal seal. While octagonal gaskets offer higher sealing efficiency in modern flat-bottom grooves, oval gaskets remain the only choice for older round-bottom groove designs and continue to be widely used due to their proven reliability and interchangeability with octagonal gaskets in flat-bottom applications.
Oval ring gaskets are manufactured to ASME B16.20 and API 6A specifications, ensuring precise dimensional control and consistent performance. As a premier China oval ring gasket supplier, Kaxite produces oval gaskets in sizes from R11 to R105, with materials carefully selected to match your operating temperature, pressure, and chemical environment. Our CNC machining capabilities ensure tight tolerances and a perfect fit in every flange groove.
Oval cross-section – Style 800
Oval (Style 800) ★
Octagonal (Style 810)
| Material | Hardness (HB) | Temp Range (°C) | Typical Service |
|---|---|---|---|
| Soft Iron | 90 | -60 to 500 | General oilfield, moderate temperatures |
| Low Carbon Steel | 120 | -40 to 540 | High-temperature service, refineries |
| SS304 / 304L | 160 | -250 to 540 | Cryogenic to moderate high-temp, general corrosion |
| SS316 / 316L | 160 | -200 to 815 | Superior corrosion resistance, chemical plants |
| SS321 / 347 | 160 | -200 to 870 | High-temp, sensitization resistance |
| SS410 | 170 | -200 to 850 | Wear resistance, valve applications |
| Inconel 600/625 | 150 | -100 to 1095 | Severe corrosion, high-temp, aerospace |
| Incoloy 800/825 | 150 | -100 to 1095 | Corrosive environments, acid service |
| Monel 400 | 150 | -100 to 1095 | Seawater, marine, chemical processing |
Additional materials: Hastelloy B2/C276, Titanium, Zirconium, Copper, and Duplex grades available upon request.
Case Example: Mature Pipeline System Retrofit
A pipeline operator in the Middle East needed replacement gaskets for an aging facility with round-bottom flange grooves. Octagonal gaskets were not compatible with the existing groove design. Kaxite supplied oval ring joint gaskets in SS316 material for 8" 900# flanges. The oval design perfectly matched the round-bottom grooves, ensuring a leak-tight seal. After installation, the gaskets have performed flawlessly for over 30 months, with zero reported leaks, extending the life of the existing flange infrastructure without costly modifications.
For other ring joint gasket types, explore our Octagonal, API Ring Joint, BX, RX, and Lens gaskets.
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Need custom dimensions or specialty alloys? Send your inquiry and our engineering team will respond within 24 hours.
★ China's Leading Oval Ring Joint Gasket Manufacturer – Request Your Quote
Contact Kaxite for factory-direct pricing, custom alloys, and expert technical support.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
