Table of Contents
What is Ring Type Joint (RTJ)?
Ring Type Joint (RTJ) is a type of sealing joint used in high-pressure and high-temperature environments. This type of flange features a specialized grooved surface designed to accommodate RTJ gaskets. The metal ring gaskets are placed within this groove, ensuring that the gaskets are compressed when the flanges are connected, thereby forming a high-pressure seal.
Key features of Ring Type Joint (RTJ):
- Sealing design: RTJ seals typically consist of metal rings with circular cross-sections suitable for high-pressure and high-temperature environments. The sealing ring is placed in the flange groove to provide a strong and reliable seal.
- Material: RTJ sealing rings are usually made of high-temperature and corrosion-resistant metals, such as stainless steel, alloy steel, or nickel-based alloys. These materials can maintain excellent sealing performance under extreme operating conditions.
- Application: RTJ flanges are commonly used in pipeline systems in the oil and gas industry, chemical process pipelines, power plants, and other high-pressure and high-temperature conditions.
- Flange face: RTJ flanges typically have grooves so that the sealing ring can be appropriately placed and compressed to ensure an effective seal.
Types of rtj gasket
Type R ( oval/ octagonal ) Ring Type Gasket
Type RX RTJ Ring Gasket
Type BX RTJ Joint Gasket
Type SBX / SRX
Comparison of different flange faces
Here’s a comparison of different flange faces, including Ring Type Joint (RTJ) flanges, Flat Faced Flanges, Raised Face Flanges, and Grooved Flanges:
| Feature | Ring Type Joint (RTJ) Flanges | Flat Faced Flanges | Raised Face Flanges | Grooved Flanges |
| Seal Design | Uses metal ring gaskets placed in a groove, providing a seal through compression. | Uses flat gaskets with a flat sealing surface. | Sealing surface is raised above the flange’s main plane, typically used with non-metallic gaskets. | Features an internal groove, used with metal or non-metallic gaskets for sealing. |
| Pressure and Temperature Suitability | Suitable for high pressure and high temperature environments. | Suitable for low to medium pressure environments. | Suitable for medium to low pressure environments. | Suitable for lower pressure environments. |
| Applications | Widely used in oil, gas, chemical, and nuclear industries. | Used in light industrial applications and low-pressure pipelines. | Used in industrial pipelines and general process applications. | Used in cooling systems and low-pressure steam systems. |
| Installation and Maintenance | Requires precise alignment and professional knowledge; maintenance frequency is lower. | Easier to install but offers lower sealing performance. | Relatively easy to install and maintain but offers moderate sealing performance. | Simple installation, suitable for lower pressure environments. |
| Sealing Performance | Provides excellent sealing performance, effective in high pressure and high temperature conditions. | Sealing performance is limited by gasket material; suitable for low-pressure environments. | Offers good sealing performance, suitable for medium to low pressure environments. | Sealing performance is influenced by groove and gasket material; suitable for lower pressures. |
| Flange Face Design | Features a groove design for metal ring gaskets. | Flat face design. | Raised face design to enhance sealing pressure. | Features an internal groove to accommodate gaskets. |
