Ring Joint Gaskets (RTJ) are precision-engineered components used in high-pressure and high-temperature applications, particularly in the oil and gas, petrochemical, and power generation industries. They are designed to fit into machined grooves on flanges, providing a metal-to-metal seal.
Specification
- Material Composition:
- Metals: Typically made from various metals such as soft iron, low carbon steel, stainless steel (304, 316), Inconel, Monel, and other alloys, depending on the application requirements and compatibility with the media.
- Hardness: The gasket material is usually softer than the flange material to ensure proper deformation and sealing.
- Design:
- Oval: Traditional shape that fits into the standard groove, offering effective sealing by plastically deforming into the groove.
- Octagonal: Offers better sealing performance compared to the oval shape due to its higher degree of deformation and surface contact.
- RX: Pressure-energized type suitable for high-pressure applications; fits into a standard RTJ groove and provides better sealing as pressure increases.
- BX: Designed for very high-pressure applications, specifically used in API 6BX flanges, ensuring a pressure-tight seal.
- Dimensions:
- Conform to various standards such as API 6A, ASME B16.20, and ISO 15156, ensuring compatibility with corresponding flanges.
- Pressure and Temperature Ratings:
- Pressure: Typically used in systems with pressures up to 20,000 psi.
- Temperature: Can handle extreme temperatures, typically ranging from -200°C to +800°C, depending on the material.