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Ring Type Joint Socket Weld Flange (RF)

Ferrobend manufactures and supplies premium quality Ring Type Joint Socket Weld Flanges (RTJ) designed for secure connections in small-bore, high-integrity piping systems. Featuring a precision-machined socket bore and Ring Type Joint (RTJ) groove, these flanges allow the pipe to be accurately positioned and secured by a fillet weld, while the RTJ design provides reliable metal-to-metal sealing. Suitable 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
Raised Face Socket Weld Flange (RF)
What Is a Ring Type Joint Socket Weld Flange
01 — WHAT IS IT?

What Is a Ring Type Joint Socket Weld Flange?

A Ring Type Joint Socket Weld Flange (RTJ SW Flange) is a high-pressure forged flange designed for small-bore, high-pressure, and high-temperature piping systems. It features a socket bore where the pipe end is inserted and fillet-welded, along with a precision-machined RTJ groove that accommodates a metallic ring gasket to provide reliable sealing.

Unlike conventional soft gasket sealing systems, the RTJ groove securely seats the metal ring gasket as the flange is bolted together, creating a highly reliable seal for demanding operating conditions, including high pressure, thermal cycling, and vibration.

The socket weld design simplifies pipe positioning and alignment before welding, making it particularly suitable for small-diameter piping systems where accurate fitment and a compact connection are important. With its robust sealing performance and durable forged construction, RTJ Socket Weld Flanges are widely used in critical piping applications where leakage prevention and sealing integrity are essential.

Ring Type Joint Socket Weld Flange Industrial Piping

Superior Metal-to-Metal Sealing

Reliable sealing is achieved through compression of a metallic ring gasket within the RTJ groove.

Accurate Pipe Alignment

The precision-machined socket bore ensures accurate pipe positioning before the fillet weld is completed.

Excellent Leak Resistance

The RTJ groove and metallic gasket provide dependable sealing for critical piping systems.

High-Pressure & Temperature Performance

Designed to perform reliably under demanding pressure and temperature variations.

Compact & Durable Connection

Its compact construction is well suited for space-restricted and demanding piping layouts.

03 — WHY CHOOSE

Why Choose Ring Type Joint Socket Weld Flanges?

Ring Type Joint Socket Weld Flanges are preferred for demanding piping applications because they combine a strong socket weld connection with the reliable sealing performance of a metallic RTJ gasket. Their compact design, accurate pipe positioning, and excellent resistance to pressure, vibration, and temperature variations make them a dependable choice for critical piping systems where sealing integrity is essential.

04 — ENGINEERING DESIGN

Design & Construction of Ring Type Joint Socket Weld Flanges

The Ring Type Joint Socket Weld Flange (RTJ SW Flange) is engineered to provide reliable sealing performance, structural strength, and accurate pipe fitment in compact piping configurations. Its precision-machined socket bore allows accurate pipe positioning and supports secure fillet welding, while the precision-machined RTJ groove accommodates the metallic ring gasket for high-integrity sealing.

Manufactured through controlled forging processes, the flange provides enhanced mechanical strength and structural integrity. Heat treatment, when specified, improves strength, toughness, and durability, while CNC machining maintains accurate tolerances, bore alignment, and RTJ groove geometry. The internal socket shoulder controls pipe insertion depth and helps maintain consistent positioning before welding.

When the flange bolts are tightened, the metallic ring gasket seats within the RTJ groove and forms a high-integrity seal. RTJ Socket Weld Flanges can be manufactured with R-Series (Oval & Octagonal), RX-Series (Pressure-Energized), and BX-Series groove configurations according to the applicable flange standard and service requirements. This robust construction makes them suitable for high-pressure, high-temperature, and thermal cycling conditions in critical small-bore piping systems.

Design & Construction of Ring Type Joint Socket Weld Flanges
05 — ADVANTAGES

Advantages of Ring Type Joint Socket Weld Flanges

Ring Type Joint Socket Weld Flanges offer a combination of high-pressure capability, reliable metallic sealing, and robust construction for demanding small-bore piping systems. Their socket-weld connection and precision RTJ groove make them well suited for applications requiring dependable performance under pressure, vibration, and temperature variations.

Exceptional Pressure Handling

Designed for demanding high-pressure, small-bore applications.

Reliable Metallic Sealing

The RTJ groove and metallic ring gasket provide high-integrity sealing under severe service conditions.

Strong Forged Construction

Provides excellent structural strength, durability, and resistance to mechanical loads.

High Fatigue Resistance

Performs reliably under vibration, thermal cycling, and load variations.

Reliable Severe-Service Performance

Suitable for high-temperature and demanding industrial environments where sealing integrity is critical.

Advantages of Ring Type Joint Socket Weld Flanges
06 — MATERIALS WE OFFER

Materials Available for
Ring Type Joint Socket Weld Flanges

Ferrobend manufactures Ring Type Joint Socket Weld 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 Type Socket Weld Flange Specifications

Dimensional Standards

Pressure Ratings

Standard Pressure Rating
ASME B16.5 Class 150 – 1500
ISO / EN PN 6 – PN40

Forming Methods

Hot Forged

Shaped by heating a solid billet and compressing it under high pressure, aligning the grain flow for superior strength and pressure resistance.

CNC Machining

Precision-cut from solid stock using computer-controlled tools, delivering tight tolerances and smooth finishes for custom or complex flange geometries.

View Full Dimension Table (1/2"– 24", DN15–DN600)

✓ 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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