Reducer

Big and small head, also known as reducer, is a pipe fitting used to connect pipes of different diameters. Here is a detailed introduction about Big and Small Head:

Structural characteristics

Shape: The shape of the head is usually a frustum or cone with different diameters at both ends, and its side is a smooth transition surface, allowing the fluid inside the pipeline to flow smoothly from the large diameter end to the small diameter end, or vice versa.

Connection methods: The main connection methods with pipelines include welding, flange connection, and threaded connection. The welded reducer has welding grooves at both ends for easy welding connection with the pipeline, forming a solid whole with good sealing after welding; The flange connection type has flange plates at both ends, which are connected to the flanges on the pipeline through bolts. This connection method is easy to disassemble and maintain; The threaded connection type head has internal or external threads machined at both ends, which are connected to the corresponding threaded pipes and suitable for small-diameter pipes and low-pressure systems.

manufacturing process

Stamping forming: For small and medium-sized heads, stamping technology is often used. Place a circular metal sheet into a mold and apply pressure through a stamping machine to gradually deform the sheet in the mold, forming a shape with large and small heads. This process has good production efficiency, dimensional accuracy, and surface quality.

Hot pressing: For large-diameter or thick walled large and small heads, hot pressing is a commonly used method. Place the metal tube blank heated to a certain temperature into the mold, and then apply pressure to the tube blank through a press machine to gradually deform it in the mold, achieving the desired large and small head shape. Hot pressing can effectively improve the internal structure of the main metal, enhancing the strength and toughness of the head size.

Forging: In some situations where high strength and quality are required, forging technology is used to manufacture large and small heads. During the forging process, the metal billet undergoes processes such as heating, hammering, and extrusion, resulting in a denser internal structure and significantly improved mechanical properties. But the forging process has high costs and relatively low production efficiency.

Advantages: It can achieve smooth transition between pipes of different diameters, making fluid flow smoother in the pipes and reducing fluid resistance and pressure loss; Different materials and connection methods can be selected according to actual needs to adapt to various working environments and media requirements; The structure is simple, easy to install, and can effectively save space and cost of the pipeline system.

scope of application

Da Xiao Tou is widely used in pipeline systems in industries such as petroleum, chemical, metallurgical, power, construction, and water treatment. In the petrochemical industry, it is commonly used to connect process pipelines of different diameters to meet the flow and pressure requirements between different equipment; In the building water supply and drainage system, it can be used to connect water pipes on different floors or in different areas to achieve reasonable distribution of water flow; In the power industry, cooling water pipes or steam pipes used to connect equipment such as generators and transformers are used to confirm the normal transport of fluids.