Key Features and Types of Malleable Iron Threaded Fittings

Apr 10, 2024 | News

Modern infrastructure depends on efficient water and gas supply systems, along with effective sewage and wastewater removal. Behind the scenes, underground piping networks play a pivotal role in supporting these essential mechanisms. At the heart of these networks, durable pipe fittings come into play. Among them, malleable threaded fittings stand out for their versatility and reliability.

What Are Malleable Iron Pipe Fittings?

Malleable iron pipe fittings serve as metal components designed to connect and secure pipework. Their name originates from the distinctive properties of the metal used in their construction.

Key aspects of Malleable Iron Pipe Fittings

Casting Process

how malleable iron fittings are created through a casting process:

  • The metal (iron) is heated until it becomes molten.
  • The molten metal is poured into molds shaped according to the desired fittings (e.g., elbows, tees, unions).
  • After cooling, the metal solidifies in the desired shape.

Malleability and Composition

“Malleable” refers to the metal’s ability to be easily reshaped and molded. During casting, temperatures can soar to 250°C (482°F) while being subjected to pressures ranging from 150 to 300 psi. This allows electrons within the metal to shift, creating a layered structure that grants it both flexibility and the ability to take on new forms.

Strength and Durability

While malleable iron fittings are not as strong as some other materials, they offer excellent tensile strength. This durability ensures that they can withstand years of use, making them a reliable choice for various applications.

malleable iron fittings dimensions

Common Types of Malleable Iron Fittings

  • Elbows: commonly used in small-diameter piping systems and are easy to use and leak-proof. These elbows allow pipes to be connected at angles, facilitating efficient routing and installation.
  • Tees: used to create a T-shaped junction in pipework. It allows to connect three pipes at right angles. These tees are commonly used in plumbing, industrial setups, and mechanical systems.
  • Unions: used to join two pipes together. It provides a detachable joint, allowing easy disassembly and maintenance. These unions are commonly used in plumbing, industrial setups, and mechanical systems. 
  • Bushings: are connectors used to join pipes or fittings with varying diameters. They feature male threads on one end and female threads on the other. These versatile components find common applications in plumbing and industry, allowing for pipe size reduction or enlargement.
  • Caps: used to close off the end of a pipe or fitting. It has female threads and is designed to prevent leaks in plumbing setups. They are commonly used in various applications where sealing the end of a pipe is necessary. The dimensions and specifications ensure proper fit and functionality.


Malleable iron fittings find applications in various fields:

  • Water Supply: Underground water supply equipment relies on these fittings.
  • Industrial Machinery: They anchor heavy machinery securely.
  • Gas Systems: Malleable fittings ensure gas pipelines remain leak-free.
  • Mechanical Engineering: From factories to automotive workshops, these fittings play a vital role.


Malleable iron threaded fittings offer a blend of versatility, durability, and straightforward installation. Whether you’re tackling a plumbing project, industrial setup, or mechanical system, these fittings ensure dependable connections. Fuild Tech is a malleable iron fittings company can help to select the appropriate type and size of fittings to match your specific needs.