Ring Type Joint Flanges Suppliers

RTJ (Ring Type Joint) and RF (Raised Face) flanges differ in both sealing mechanism and application suitability:

Sealing Design

1. RTJ Flange uses a metal ring gasket seated in a precision-machined groove, offering a metal-to-metal seal.
2. RF Flange uses flat or spiral wound gaskets, compressing between flat surfaces for sealing.

Pressure & Temperature

1. RTJ flanges are built for extremely high pressure and temperature environments, often in subsea, refinery, or offshore drilling operations.
2. RF flanges are more versatile and suitable for moderate to high pressures, used in general industrial pipelines.

Cost & Maintenance

1. RTJ systems are more cost-intensive, but they offer superior reliability.
2. RF flanges are more economical and easier to maintain, making them popular in standard applications.

Ring Type Joint flanges require metal ring gaskets that fit precisely into a machined groove on the flange face, ensuring a pressure-tight metal-to-metal seal.

Common Types of RTJ Gaskets:

• R-Type Ring Gasket: Oval or octagonal in shape; most widely used and compatible with standard RTJ grooves.
• RX-Type Gasket: High-pressure variant of R-type; self-sealing and suitable for pressure cycling.
• BX-Type Gasket: Designed for API 6A flanges; suitable for very high-pressure applications up to 20,000 psi.

Material Selection Tips:

• Soft Iron, Low Carbon Steel: For mild service and moderate temperatures.
• Stainless Steel (SS 304 / 316 / 321): For corrosion resistance and chemical exposure.
• Inconel / Monel / Hastelloy / Duplex: For aggressive environments like offshore, chemical plants, or refineries.

Selection Factors:

• Match gasket material to flange and media.
• Ensure gasket type matches flange groove design (R, RX, or BX).
• Consider pressure rating, temperature, and fluid type.

Ring Type Joint (RTJ) Flanges are highly recommended for sour service (as defined by NACE MR0175/ISO 15156) and critical isolation points because of their leak-proof metal-to-metal sealing and high resistance to aggressive environments.

Reasons RTJ Flanges Excel in These Conditions:

• Leak Integrity: The gasket is compressed into a machined groove, ensuring no gap remains for corrosive gases like H₂S to escape.
• Corrosion-Resistant Materials: Often manufactured from Inconel, Monel, Duplex, Super Duplex, or Low-Alloy Steels with added PTFE or anti-corrosive coatings.
• High Pressure Ratings: Suitable for Class 900 to 2500 pressure systems — ideal for critical isolation of high-pressure lines.
• Compliance with NACE & Offshore Standards: RTJ flanges are engineered to withstand sulfide stress cracking, a common threat in sour gas fields.

We export high-quality Ring Type Joint (RTJ) Flanges to a wide range of industries and EPC contractors across the globe. Our major export destinations include:

• United Arab Emirates (UAE) – for oilfield applications and petrochemical plants
• Saudi Arabia & Oman – for offshore drilling rigs and gas processing units
• USA & Canada – for high-pressure pipeline systems and refinery projects
• Germany, Italy & Spain – for power generation and marine industries
• Singapore & Indonesia – for shipbuilding and LNG terminals
• Qatar, Kuwait & Bahrain – for desalination and oil export terminals
• South Africa & Egypt – for energy infrastructure and fabrication units

All RTJ flanges are export-ready with certified packaging, heat numbers, test reports, and documentation like EN 10204 3.1 / 3.2, IBR, NACE MR0175, and ISO 9001, ensuring smooth customs clearance and international project approvals.

While technically possible, RTJ flanges are not typically reused without re-machining. The sealing groove and ring gasket undergo deformation during tightening, which may affect their sealing ability upon reinstallation.

In critical applications, it's strongly recommended to replace both the gasket and reface the groove or use new RTJ flanges entirely to maintain system integrity. This practice aligns with industry standards for pressure integrity and safety in oil & gas and petrochemical plants.