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RTJ Flanges vs RF Flanges – What’s the Difference

RTJ Flanges vs RF Flanges

If you’ve been researching flanges, chances are you’ve heard of RTJ (Ring Type Joint) and RF (Raised Face) flanges. You may be wondering what the difference is between these two types of flange designs, or which one you should use for your particular project. Read on to learn more about each flange type and which is best for your needs.

RTJ Flanges

RTJ (Ring Type Joint) flanges are crucial for sealing high-pressure piping systems effectively. Utilizing a metal ring and gasket combination ensures leak-proof connections, particularly in critical applications with hazardous materials or high pressures. Made from durable materials such as steel or stainless steel, RTJ flanges feature a raised face design that enhances their sealing capabilities. With the ability to withstand temperatures up to 1000°F and pressures up to 1500 psi, they provide reliable performance in demanding industrial settings.

RF Flanges

RF (Raised Face) flanges have a raised face that sits above the level of the pipe’s surface. The raised Face helps provide a better seal when combined with a gasket, which can help increase pressure ratings in specific applications. Another advantage of an RF flange is that it can be used in lower temperature applications than an RTJ flange due to its flexibility. However, RF flanges are not well suited for higher-pressure applications since they are not as strong as RTJ flanges.

An RF flange is a type of pipe flange that is used in low-pressure applications. RF flanges are made from cast iron or steel and have a flat face that is designed to seal against another flat face. RF flanges are available in a variety of sizes and pressure ratings.

Difference Between RTJ and RF Flanges

The primary difference between RTJ and RF flanges is their pressure rating. RTJ flanges are rated for higher pressures than RF flanges. Additionally, RTJ flanges have a raised face, while RF flanges have a flat face.


RTJ (Ring Type Joint) flanges are commonly employed in high-pressure systems where tight sealing is crucial, such as oil and gas pipelines, chemical processing plants, and offshore drilling rigs. Their robust sealing capabilities make them ideal for hazardous materials or extreme pressures applications.

On the other hand, RF (Raised Face) flanges find extensive use in various industries, including water treatment facilities, power generation plants, and HVAC systems. They are preferred for applications requiring moderate pressure and temperature conditions, where a reliable seal is necessary, but extreme sealing capabilities are optional.


Due to their metal ring and gasket design, RTJ (Ring Type Joint) flanges offer superior sealing performance, particularly in high-pressure and high-temperature applications. They provide a robust and reliable seal, making them suitable for critical environments where leakage prevention is paramount.

On the other hand, RF (Raised Face) flanges are versatile and easy to install, offering a reliable seal at moderate pressures and temperatures. They are cost-effective and widely used in various applications where extreme sealing capabilities are not required, but dependable sealing is essential for smooth operation.


Overall, both RTJ and RF flanges have their own advantages depending on the needs of your application. If you need a reliable seal at higher temperatures and pressures, an RTJ Flange may be the right choice for you; however, if you need lower temperature flexibility or don’t require high-pressure ratings, then an RF Flange could work better for your project. Understanding the differences between these two types of flanges will help you make an informed decision when selecting the best option for your next project.

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