raised face flange

1. Description

Raised Face Flanges are widely used in piping systems for the connection of pipes, valves, and other equipment. The raised face is the most common flange face style and is designed to allow for a tight seal when mated with a flat face or raised face on the corresponding flange. It is specifically designed to handle high-pressure and high-temperature applications. Locus Raised Face Flanges are manufactured according to ANSI and ASME standards, ensuring durability and reliability in various industrial applications.

2. Specifications

3. Working

The Raised Face Flange works by ensuring a tight seal when a gasket is compressed between the raised face and the corresponding flange. The raised portion of the flange creates a sealing surface, which improves pressure and temperature resistance by ensuring that the gasket remains intact under high operational conditions. The flanged connection prevents leakage of fluids or gases within the piping system.

4. Principle

The principle behind the Raised Face Flange is based on the compression of a gasket placed between the raised portion of the flange face and the connected flange. When bolted together, the raised face increases the pressure on the gasket, creating a secure seal that prevents leakage. The raised face distributes the load evenly across the gasket, allowing for high-pressure endurance.

5. Assembly

1. Align the Flange: Ensure that the raised face of the flange is aligned with the corresponding flange.
2. Insert the Gasket: Place the gasket on the raised face of the flange.
3. Position the Flanges: Align the bolt holes of both flanges.
4. Insert Bolts: Insert bolts through the aligned bolt holes.
5. Tighten Bolts: Tighten the bolts in a cross-pattern to ensure even distribution of pressure.
6. Check for Leaks: Once the assembly is complete, test for leaks under pressure.

6. Installation Process

1. Preparation of Surfaces: Clean both flange surfaces thoroughly to remove dirt, rust, or other contaminants that could compromise the seal.
2. Gasket Selection: Choose the correct gasket material depending on the application (e.g., rubber, spiral wound).
3. Position Flanges: Position the raised face of the flanges facing each other with the gasket between them.
4. Align Bolt Holes: Ensure that the bolt holes are properly aligned.
5. Insert and Tighten Bolts: Insert bolts and tighten using a torque wrench in a crisscross pattern to avoid distortion.
6. Check Alignment and Tightness: Ensure that the flange is securely aligned and tightened evenly before pressurizing the system.
7. Leak Test: Test for any leaks by pressurizing the system and checking for possible escape points.

7. Technical Specifications

8. Troubleshooting

9. HS Codes

• HS Code for Flanges (General): 730721
• HS Code for Raised Face Flanges (Steel or Alloy): 73072190
• HS Code for Stainless Steel Flanges: 730722
• HS Code for Gaskets: 84841090

10. FAQ

Q1: What is the difference between a raised face flange and a flat face flange?
A: The main difference is that a raised face flange has a small raised area around the bore, which helps to compress the gasket when the flange is bolted to the mating flange. A flat face flange has a flat surface, which requires additional measures for sealing.

Q2: Can raised face flanges be used for high-temperature applications?
A: Yes, raised face flanges are ideal for high-temperature and high-pressure applications. They provide a better seal and can withstand extreme operational conditions.

Q3: How do I know if I need a raised face or flat face flange?
A: Raised face flanges are typically used in high-pressure systems, while flat face flanges are used in low-pressure applications.

11. Applications

• Power Plants: Used in systems handling high-pressure steam or gas.
• Oil & Gas: For pipeline connections in offshore and onshore facilities.
• Marine: Installed on ship systems for fuel, water, and air management.
• Chemical Processing: Utilized for high-temperature and corrosive fluid systems.
• HVAC Systems: For ductwork connections in industrial buildings.
• Automotive: In exhaust systems for sealing pipes and joints.

Locus Brand Manufacturing Process

• • Locus manufactures Raised Face Flanges with high precision and quality materials that meet industry standards. Our production process includes state-of-the-art CNC machining, quality testing, and certified material sourcing to ensure top-notch performance in industrial applications.