Cross tee also known as pipe fittings tee or tee joints. Used chiefly to change the direction of fluid. Used in mains to branch pipes. Can be classified by diameter.
Generally with carbon steel, cast iron steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon Ge Li, PVC and other materials.
The cross tee has three openings, namely one inlet and two outlets. Or two inlets, an outlet of a chemical pipe, T shape and Y shape, with equal diameter pipe mouth, also have different diameter pipe, for the same or different pipeline convergence. The main function of the tee is to change the direction of the fluid.
Cross Tee Classification
- By diameter size
The nozzle ends of the equal diameter tee are of the same size;
The diameter of the head of the tee is the same size, and the branch pipe is smaller than the head.
- By process
2.1 Hydraulic bulging
Hydraulic bulging of tee is a kind of forming process of branch pipe by axial compensation of metal material. The process is that a special hydraulic press is used to inject liquid into a pipe blank with the diameter of the tee, and the pipe blank is squeezed through two horizontal side cylinders of the hydraulic press to move synchronously to the center, the volume of the tube blank becomes smaller after being squeezed. The liquid in the tube becomes smaller and the pressure increases with the volume of the tube. When the pressure of the three-way branch pipe bulges, the metal material flows along the die cavity under the double action of the side cylinder and the liquid pressure inside the tube and bulges into the branch pipe.
The hydraulic bulging process of tee can be formed in one time with high production efficiency. The tee head and shoulder wall thickness are increased.
Because of the large tonnage of equipment required by the hydraulic bulging process of seamless tee, it is mainly used in the manufacture of standard wall thickness tee less than DN400 in China. The suitable forming materials are low carbon steel, low alloy steel and stainless steel, including some non-ferrous metal materials, such as copper, aluminum, titanium, etc.
2.2 Hot embossing
The hot-pressing forming of tee is to flatten the tube blank larger than tee diameter to the size of tee diameter and open a hole in the part of the stretched branch pipe. The tube billet is heated and put into a forming die, and the die for drawing the branch pipe is loaded into the pipe billet; In the process of radial compression, the metal flows to the branch pipe and forms branch pipe under the drawing of die. The whole process is formed by the radial compression of the tube billet and the drawing of the branch pipe. Different from the hydraulic bulging tee, the metal of the branch pipe is compensated by the radial motion of the tube blank, so it is also called the radial compensation process.
The tonnage of equipment required for material forming is reduced due to the use of post-heated pressing tee. The hot-pressing tee has a wide adaptability to materials, and is suitable for low carbon steel, alloy steel and stainless steel. Especially for the tee with large diameter and thicker wall, this forming process is usually adopted.
- By material
Carbon steel, cast iron steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon Ge Li, PVC and so on.
- By production method
Top, pressing, forging, casting, etc.
Cross Tee Function
The main function of the cross tee pipe is to meet the supply of the branch flow pipe, a tee joint can solve the installation of the pipe around to around, eliminating the need for pipeline laying. The pipe fittings are smooth inside and outside, non-toxic, not easy to rust, and have the advantages of high strength, good tensile performance and strong hygienic performance.
Cross Tee Connection Way
Cross tee fitting has a variety of connections, such as: clamping, welding, grooves, ring pressure, etc., different connections, in the connection can also be firmly connected, prevent pipe looseness, leakage problem. One of the advantages of double compression connection is more prominent, the cost of pipe fittings is relatively low, the installation does not use open fire, the safety of the construction site, the pipe fittings are firmly sealed, the connecting technology is mature and stable.