ring type joint flange

ring type joint flange

Description

1. Product Description

A Ring Type Joint Flange (RTJ Flange) is a high-performance flange designed for use in industries that demand high pressure and high-temperature resistance. These flanges have grooves for metallic rings that provide a leak-proof joint under extreme conditions. RTJ flanges are designed to seal high-pressure and high-temperature systems such as oil and gas pipelines, chemical reactors, and other high-stress industrial applications.

- Material: Manufactured from durable materials like carbon steel, stainless steel, and high-alloy steel.
- Types of Rings: Available in various configurations like Octagonal, R-Style, and L-Style rings for different pressure ratings.

2. Product Specifications

Specification	Value
Material Types	Carbon Steel, Stainless Steel, Alloy Steel, Titanium
Size Range	1/2″ – 24″ (custom sizes available)
Pressure Class	150, 300, 600, 900, 1500, 2500
Ring Types	Octagonal, R-Style, L-Style
Groove Type	Spiral, Trapezoidal
Bolt Hole Types	Round, Square, Oval, Double-Bolt
Surface Finish	Raised Face, Flat Face, Ring Grooves
Standard Compliance	ASME B16.5, B16.47, API 6A, ANSI B16.47, PED, TUV, CE

3. Working

The Ring Type Joint Flange (RTJ Flange) works by utilizing a metallic ring that fits into grooves cut into the flanges. When bolted together, the compressive force on the ring ensures a tight seal, making it ideal for high-pressure and high-temperature applications. The metal ring deforms under pressure to fill the groove, effectively sealing the joint and preventing leakage.

4. Principle

RTJ flanges use the principle of mechanical deformation and compression sealing. The metallic ring within the groove deforms elastically under pressure, filling the groove and creating a metal-to-metal seal. This design allows RTJ flanges to handle extremely high-pressure conditions while maintaining a reliable seal.

- Seal Type: Metal-to-metal sealing.
- Compression Mechanism: Pressure applied from bolting forces the ring to deform and seal.

5. Assembly

Place the Flanges: Place two RTJ flanges facing each other, ensuring the grooves align correctly.
Insert the Metal Ring: Insert the appropriate metal ring (R-Style, L-Style, or Octagonal) into the grooves.
Align the Bolt Holes: Ensure the bolt holes of both flanges align.
Insert Bolts: Insert the required bolts and tighten them in a cross pattern.
Torque Bolts: Use a torque wrench to tighten the bolts evenly to the specified torque value.

6. Installation Process

Preparation: Ensure both flanges and the ring are clean and free of contaminants.
Groove Inspection: Check grooves on both flanges for proper dimensions and alignment.
Ring Selection: Choose the correct metal ring type (Octagonal, R-Style, or L-Style) based on pressure class and application.
Mounting: Place the metal ring into the flange groove.
Bolting: Install bolts and tighten in a star pattern to ensure even pressure distribution.
Final Torqueing: Tighten the bolts to the specified torque values to ensure a reliable seal.

7. Technical Specification

Attribute	Specification
Ring Types	Octagonal, R-Style, L-Style
Material Strength	250-350 MPa (depends on material)
Max Operating Pressure	Up to 2500 psi (for high-pressure applications)
Operating Temperature	-196°C to 800°C (varies based on material)
Bolt Tightening Torque	50-250 Nm (depends on size and pressure class)
Leakage Rate	Leak-tight under specified pressure and temperature

8. Troubleshooting

Problem	Cause	Solution
Leakage	Incorrect ring size, uneven bolt tightening, flange misalignment	Ensure correct ring selection, re-torque bolts evenly, and realign flanges.
Difficulty in Assembling	Misalignment of bolt holes, incorrect gasket installation	Realign holes, check gasket for proper fit.
Flange Damage	Excessive torque, poor material quality	Use torque wrench to tighten bolts within the recommended torque range.
Excessive Corrosion	Incorrect material for the application	Select corrosion-resistant materials like stainless steel or alloy steel.

9. HS Codes

HS Code for Ring Type Joint Flange:
- 73072100 – Flanges of iron or steel, non-alloy, for pipes.
- 73072190 – Other flanges of iron or steel (includes RTJ flanges).

10. FAQ

Q1: What materials are used in manufacturing RTJ flanges?
A1: RTJ flanges are commonly made from materials such as carbon steel, stainless steel, alloy steel, titanium, and monel. Specific material selection depends on the application’s pressure and temperature requirements.

Q2: What types of sealing rings can be used with RTJ flanges?
A2: RTJ flanges can use octagonal, R-Style, or L-Style sealing rings, depending on the pressure class and application.

Q3: How do I select the correct ring for my RTJ flange?
A3: The selection of the ring type depends on the pressure rating, temperature requirements, and the type of flange grooves. Ensure the ring matches the flange’s groove dimensions.

11. Applications

Ring Type Joint Flanges are used in various industries, including:

- Oil and Gas: High-pressure pipelines, drilling rigs, production platforms.
- Chemical Industry: Reactors, high-pressure vessels.
- Power Plants: Boilers, turbines, and piping systems.
- Marine: Offshore rigs, shipbuilding applications.
- Petrochemical: Petrochemical processing units, storage tanks.
- HVAC: High-pressure and high-temperature systems in air conditioning and refrigeration.