Flare Fittings Manufacturers

INDUSTRY & KNOWLEDGE

Flare fittings are commonly used in fluid and gas systems to create a secure connection between pipes or tubes. They are designed with a flared end on the tubing that fits into the fitting, allowing for a tight seal. The flare fitting is tightened using a nut that compresses the flare against the seat of the fitting, preventing leaks. Here's a breakdown of their structures and materials:

Structure of Flare Fittings
1. Nut:
The nut is a hexagonal or cylindrical piece that screws onto the fitting to secure the tubing. It has an internal thread that allows it to connect with the external threads of the flare fitting or other parts of the assembly.
2. Ferrule (sometimes):
Some flare fittings use a ferrule, which is a small metal ring that sits around the tubing before the nut is tightened. Its purpose is to help grip the tubing and ensure a better seal, especially in higher-pressure applications.
3. Flare Cone (or Flared End of the Tubing):
The tubing is cut and then flared, meaning the end of the tube is expanded outward at a 45-degree angle. This creates a conical surface that will mate with the fitting's seat, forming a leak-tight seal when the nut is tightened.
4. Fitting Body: 
The body of the flare fitting is the component that holds the flared tube in place. It typically has an internal tapered seat, which aligns with the flared end of the tubing to create the sealing surface.
5. Sealing Surface:
The seat of the fitting, where the flared tubing meets, is usually a precisely machined surface that ensures a proper seal under pressure.

Materials of Flare Fittings
Flare fittings are made from materials that offer durability, corrosion resistance, and strength, especially under high-pressure conditions. Common materials include:
1. Brass:
Brass is one of the most common materials used for flare fittings due to its excellent corrosion resistance, machinability, and ability to provide a secure seal. It's widely used in low to moderate-pressure systems.
2. Stainless Steel:
Stainless steel is often used for flare fittings in more demanding applications, such as those requiring higher pressure resistance or those exposed to harsh environments (e.g., chemicals or high temperatures). Stainless steel flare fittings are available in different grades, including 304 and 316 stainless steel, depending on the requirements.
3. Carbon Steel:
Carbon steel flare fittings are commonly used in industrial applications where cost-effectiveness is a priority. These are less corrosion-resistant than stainless steel or brass but are suitable for many general-purpose applications.
4. Aluminum:
Aluminum flare fittings are lightweight and resistant to corrosion, making them ideal for use in industries where weight is a concern, such as aerospace or automotive.
5. Copper:
Copper flare fittings are used for applications where excellent conductivity is required, such as in refrigeration or HVAC systems.