ASTM A105 / A105N Forged Carbon Steel Body Flange Heat Exchanger Component

Forged ASTM A105 Carbon Steel Body Flange for Heat Exchanger

Body flanges act as the connectors that unite the various components of a heat exchanger, ensuring a secure and sealed assembly. The flange often has bolt holes placed for a specific orientation with the valve, and can be designed for any combination of welding or bolting applications. For example, in the automotive industry, body flanges may be used to secure body panels or structural elements together during assembly. The design, size, and material of a body flange can vary greatly depending on the specific application and requirements. Common materials include steel, stainless steel, aluminum, or plastic, chosen based on factors such as strength, durability, and corrosion resistance. 

ASTM A105 Carbon Steel Flange

Flanges Grades

Stainless Steel Flange: F304, F304L, F304H, F316, F316L, F316Ti, F310, F310S, F321, F321H, F317, F317L, F347, F347H, F904L etc

Duplex Steel Flange: UNS S31803, 2205, S31254 (254SMO)

Super Duplex Steel Flange: UNS S32750, UNS S32760, UNS S32304, S31500

Carbon Steel Flange: ASTM A105, A105N etc.

Alloy Steel Flange: F1, F11, F22, F5, F9, F91 etc.

Nickel Alloy Flange as below

Monel 400 & K500,

Inconel 600, 601, 617, 625, 690, 718, X-750.

Incolloy 800, 800H, 800HT, 825, 925.

Hastelloy C22, C4, C276, S, C2000, G-30, G-35, X, N, B, B-2, B-3.

Various Kinds of Flanges we can supply as below:

1. Slip-on Flanges.

Slip-on Flanges have a lower initial cost than welding neck flanges because they require less accuracy in cutting pipe to length, and they provide a greater ease of alignment in assembly. However, their calculated strength under internal pressure is approximately 2/3's the strength of welding neck flanges, and their life under fatigue is 1/3 shorter. Slip-on Flanges are limited to 1/2" to 2½" sizes in 1500lbs standard.

2. Threaded Flanges

Threaded Flanges are used for special applications. They can be assembled without welding and can be used in extremely high pressure services--at or near atmospheric pressure--where alloy steel is essential for strength. Threaded flanges are not suited for conditions involving temperature or bending stresses, or under cyclic conditions where leakage through the threads may occur.

3. Weld Neck Flanges

Weld Neck Flanges have a long tapered hub and gradual transition of thickness in the region of the butt weld joining them to the pipe. The tapered hub provides important reinforcement to the flange and resistance to dishing. This type of flange is preferred for severe service conditions resulting from high pressure, sub-zero or high temperatures.

4. Blind Flanges

Blind Flanges are used to blank off the ends of piping, valves and pressure vessel openings. Blind Flanges can handle high stress from internal pressure and bolt loading since the maximum stresses in the blind flange are bending stresses at the center.

5. Socket Weld Flanges

Socket Weld Flanges were developed for use on small size high pressure piping. With an internal weld, socket weld flanges are stronger and have greater fatigue strength than double welding a slip-on flange. Smooth bore conditions can be easily attained by grinding the internal weld. This flange is commonly used in chemical process piping.

6. Lap Joint Flanges

Lap Joint Flanges are used with lap joint stubs. Lap joint flanges are commonly used in carbon or low alloy steel piping systems that need to be frequently dismantled for inspection and cleaning. They should not be used at any points where severe bending stresses occur.

Some Common Applications of Body Flanges:

1. Pipe Connections: Body flanges are used to connect pipes together. They facilitate easy assembly and disassembly of piping systems, allowing for maintenance, repairs, and modifications. Flanges also provide a strong and secure joint, preventing leakage from the connection point.

2. Pressure Vessels: Flanges are employed in pressure vessels such as boilers, tanks, and reactors. They allow for the attachment of various fittings, nozzles, and other components to the vessel while maintaining a tight seal under high-pressure conditions.

3. Valves: In valve assemblies, body flanges are often used to connect the valve body to the adjoining piping system. This arrangement enables easy installation and removal of valves for repair or replacement without disturbing the pipe connections.

4. Pumps and Compressors: Flanges are commonly used in pump and compressor systems to join the inlet and outlet openings of the equipment with the corresponding piping. They ensure a secure connection and proper alignment, which is crucial for efficient operation and minimal leakage.

5. Heat Exchangers: Flanges are integral components in heat exchangers, providing connection points for the tubes or channels carrying the heating or cooling media. Flanges allow for the attachment of the tubesheet to the shell or head of the heat exchanger, creating a sealed enclosure.