Carbon Steel Fittings Flanges

Carbon steel flanges are essential components in piping systems, serving to connect pipes, valves, pumps, and other equipment. They provide a means for easy assembly, disassembly, and maintenance of the system. Flanges are typically welded or screwed onto the pipe ends and come in various shapes, sizes, and types to suit different applications.

Here are some common types of carbon steel flanges:

  1. Weld Neck Flanges: These flanges have a long tapered hub and are used in high-pressure applications. They are preferred for their strength and resistance to deformation under high stress.

  2. Slip-On Flanges: Slip-on flanges are slipped over the pipe and then welded in place. They are easier to align and install compared to weld neck flanges and are commonly used in low-pressure and non-critical applications.

  3. Socket Weld Flanges: Socket weld flanges are designed for small-bore pipes and have a socket at the bore to accommodate the pipe. They are welded on the outside and socket welded on the inside.

  4. Threaded Flanges: Threaded flanges have internal threads that match the external threads of the pipe. They are screwed onto the pipe and are commonly used in low-pressure, non-critical applications.

  5. Blind Flanges: Blind flanges are solid plates used to seal the end of a pipe, vessel, or valve. They are often used in applications where the end of the pipe needs to be closed off temporarily or permanently.

  6. Lap Joint Flanges: Lap joint flanges consist of two parts: a stub end and a backing flange. The stub end is welded to the pipe, while the backing flange is free to rotate around the stub end. They are used in applications requiring frequent dismantling or where alignment of bolt holes is critical.

  7. Threaded/Screwed Flanges: These flanges have external threads and are screwed onto the pipe or another fitting. They are commonly used in low-pressure, non-critical applications where easy assembly and disassembly are required.

Carbon steel flanges are chosen for their strength, durability, and affordability. However, they may be susceptible to corrosion, especially in harsh environments. Proper coating or treatment can help mitigate this risk. Additionally, flanges should be selected based on their compatibility with the specific requirements of the application, such as temperature, pressure, and fluid type.

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