What is the purpose of tees?
The pipe fitting known as a 'tee' is a fundamental and crucial connecting element within pipework systems.
Core Functions and Derived Value Diagram

Core Function: Splitting and Merging
This is the most fundamental and direct function of the three-way valve.
| Branching:The process of diverting a portion of the fluid medium from a main pipeline into branch pipelines as required. | |
| Examples | |
| Water supply system | Multiple branch pipes are connected from a single main water supply pipe, leading respectively to the kitchen, bathroom, and balcony. |
| Heating system | A branch line is diverted from the main heating pipeline to the radiator in a particular room. |
| Chemical process piping | A stream of raw material is diverted into different reactors. |
| Combining: The process of merging fluid media from two pipelines into a single main pipeline. | |
| Examples: | |
| Drainage system | Merging the drain pipes from two washbasins into a single main drain pipe. |
| Return system | In heating or air conditioning systems, combining the return pipes from multiple radiators into a common return pipe. |
| Gathering system | In petrochemical operations, consolidating the output from multiple oil wells into a single gathering pipeline. |
Derived Value and Engineering Significance
1.Implementing complex pipeline network layouts
2.For the installation of instruments and control equipment
3.Facilitates system maintenance and pipeline cleaning
4.Balancing system pressure and flow
The Specific Functions of Different Types of Tee Fittings
|
Three-way type |
Characteristics and Special Functions |
|
Equal-diameter tee |
The main pipe and branch pipes have the same diameter. This configuration is employed where uniform flow distribution is required or where symmetrical connections are necessary. |
|
Reducing tee |
The branch pipe diameter is smaller than that of the main pipe. This configuration is most commonly employed to create a smaller-flow branch line from the main pipe, thereby saving space and reducing costs. |
|
Four-way |
It can simultaneously branch off or converge in two perpendicular directions, facilitating more complex pipe network intersections. |
Summary
It is the "hub" and "joint" for constructing any complex pipeline system.

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