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Ring Type Joint Blind Flange (RTJ)

Ferrobend manufactures and supplies premium quality Ring Type Joint Blind Flanges (RTJ) designed for reliable, leak-resistant closure and isolation of critical industrial piping systems. Featuring a solid blind flange construction and precision-machined Ring Type Joint (RTJ) groove, these RTJ Blind Flanges provide dependable metal-to-metal sealing, secure bolted connections, and excellent mechanical integrity. Designed for demanding oil & gas, refinery, petrochemical, chemical processing, and power generation applications worldwide.

ISO 9001:2015 Third Party Inspection EN 10204 3.1 MTC Global Export Ready
Ring Type Joint Blind Flange (RTJ)
What is Ring Type Joint Blind Flange
01 — WHAT IS RING TYPE JOINT BLIND FLANGE

What Is a Ring Type Joint Blind Flange?

A Ring Type Joint Blind Flange (RTJ Blind Flange) is a solid, bore-free forged flange used to close and isolate the end of a pipe, pressure vessel nozzle, or valve in demanding high-pressure and high-temperature piping systems. Its solid disc construction provides a strong pressure-containing closure, while the precision-machined RTJ groove accommodates a metallic ring gasket.

When the flange bolts are tightened, the metallic RTJ gasket is compressed within the groove to create a reliable metallic seal. This makes RTJ Blind Flanges suitable for critical applications where dependable pressure containment and sealing integrity are essential.

RTJ Blind Flanges are widely used in oil & gas, petrochemical, refinery, offshore, power generation, and process industries, particularly where reliable pipeline isolation is required.

Ring Type Joint Blind Flange Industrial Pipeline

Superior Metallic Sealing

The RTJ groove and metallic ring gasket create a high-integrity sealing system that is well suited to high-pressure and high-temperature applications.

Reliable Pipeline Isolation

The solid, bore-free design completely closes the pipe or equipment connection, making RTJ Blind Flanges suitable for pipeline isolation, maintenance, shutdown, and pressure testing.

High Structural Strength

The forged solid construction provides excellent mechanical strength and pressure-containing capability for demanding industrial piping systems.

Reliable Under Dynamic Conditions

The robust RTJ sealing arrangement provides dependable performance under vibration, thermal cycling, and pressure fluctuations when properly selected and installed.

Suitable for Critical Industrial Applications

RTJ Blind Flanges are widely used in oil & gas, petrochemical, refinery, offshore, power generation, and process industries where reliable sealing and pressure isolation are critical.

02 — WHY CHOOSE

Why Ring Type Joint Blind Flange is Preferred

Ring Type Joint Blind Flanges (RTJ Blind Flanges) are preferred for critical piping applications where reliable isolation, pressure containment, and sealing performance are essential. Their solid forged construction combined with a precision-machined RTJ groove and metallic ring gasket provides dependable performance in demanding service conditions.

03 — ENGINEERING DESIGN

Design & Construction of Ring Type Joint Blind Flange

The Ring Type Joint Blind Flange (RTJ Blind Flange) is designed as a solid, bore-free flange for reliable pipeline closure and pressure containment. Its robust construction and precision-machined RTJ groove provide the mechanical strength and sealing integrity required for demanding piping applications.

Key Design Features

  • Solid Disc Construction – The bore-free body provides a strong pressure-containing closure for pipe ends, valves, and equipment connections.
  • Precision-Machined RTJ Groove – The sealing face incorporates an accurately machined Ring Type Joint groove for proper metallic ring gasket seating.
  • Robust Flange Thickness – The substantial cross-section provides resistance to bending and pressure loads encountered in blind-end applications.
  • Forged Construction & Heat Treatment – Provides the required mechanical strength, toughness, and durability for demanding service conditions.
  • CNC Precision Machining – Ensures accurate RTJ groove dimensions, flange face geometry, bolt-hole positioning, and dimensional tolerances.

When the flange is bolted, the metallic RTJ gasket is compressed within the precision-machined groove to establish a reliable metallic sealing connection. Proper gasket selection, flange alignment, bolt tightening, and installation procedures are essential for achieving the required sealing performance.

RTJ Groove & Ring Types

RTJ Blind Flanges may be manufactured to accommodate applicable metallic ring gasket designs, depending on the governing standard and service requirements:

  • R-Series – Commonly used with oval and octagonal ring gaskets in standard RTJ flange applications.
  • RX-Series – A pressure-energized ring gasket design used for specific high-pressure applications.
  • BX-Series – Used for API 6A wellhead and Christmas tree equipment and is not interchangeable with R or RX series rings.

The correct RTJ groove, gasket profile, pressure class, material, and applicable standard must be selected together to ensure proper compatibility and sealing performance.

Design & Construction of Ring Type Joint Blind Flange
04 — ADVANTAGES

Advantages of Ring Type Joint Blind Flanges

Ring Type Joint Blind Flanges (RTJ Blind Flanges) are designed for reliable pipeline isolation, pressure containment, and sealing integrity in demanding industrial applications. Their solid construction and metallic RTJ sealing system make them well suited for critical piping systems where dependable closure performance is required.

Reliable Pipeline Isolation

The solid, bore-free design completely closes the pipe or equipment connection, making it suitable for pipeline isolation, maintenance, shutdown, and pressure testing.

High-Pressure Sealing Performance

The precision-machined RTJ groove and metallic ring gasket provide a high-integrity sealing system for demanding high-pressure and high-temperature applications.

Strong Structural Integrity

The solid forged construction provides excellent rigidity and resistance to pressure and mechanical loads in blind-end piping applications.

Reliable Under Cyclic Conditions

The robust RTJ sealing arrangement provides dependable performance under pressure fluctuations, vibration, and thermal cycling when properly selected and installed.

Wide Industrial Application

RTJ Blind Flanges are used in oil & gas, petrochemical, refinery, offshore, power generation, and process industries, with material options selected according to the required service conditions.

Advantages of Ring Type Joint Blind Flanges
06 — MATERIALS WE OFFER

Materials Available for
Ring Type Joint Blind Flanges

Ferrobend manufactures Ring Type Blind Flanges in a comprehensive range of Stainless Steel, Carbon Steel, Alloy Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Alloys, Titanium, Copper Alloys, and other special engineering materials for demanding industrial applications.

05 — TECHNICAL SPECIFICATIONS

Ring Type Joint Blind Flange Specifications

Dimensional Standards

Pressure Ratings

Standard Pressure Rating
ASME B16.5 / B16.47 Class 75 – 2500
API 6B / 6BX 2000 PSI – 20000 PSI
DIN / EN PN 6 – PN160
JIS B2220 5K – 30K

Forming Methods

Open Die Forging

Shaped between flat or contoured dies — ideal for large-diameter flanges, giving excellent grain flow and strength.

Closed Die Forging

Metal forced into a two-piece die cavity, producing precise, tight-tolerance flanges with minimal machining.

Roll Forging

Billet progressively shaped by rotating rollers, giving a uniform grain structure and high fatigue resistance.

View Full Dimension Table (1/2"–60", DN15–DN1500)

✓ Tested & Certified

Our products are tested and certified as per international quality standards with complete traceability and documentation.

View Full QA & Testing Process →

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