Tees and crosses are both connection components for branching pipes in pipeline systems. They can be selected in different models and materials according to different pipe diameters and working environments. They are usually used for connecting branching pipes and have the characteristics of easy connection, simple structure, and low flow resistance.

There are two commonly used models: equal diameter and different diameter. The equal diameter model is suitable for situations where the diameters of the branching pipe and the main pipe are the same, while the different diameter model is suitable for connecting pipes with different diameters. The difference between tees and crosses is the number of pipes they connect. Tees connect three pipes, while crosses connect four pipes. In addition to equal diameter and different diameter models, there are many other models of tees and crosses, such as 45-degree tee, 90-degree tee, joint tee, pressure reducing tee, concentric cross, and eccentric cross. Different models of tees and crosses have different connection methods, angles, and flow control, and can be selected according to actual needs.

In terms of materials, tees and crosses can be made of different materials, such as carbon steel, stainless steel, cast iron, brass, and copper-nickel alloy. Different materials have different chemical properties and physical properties, and suitable materials can be selected according to specific application environments. In addition, there are different methods of surface treatment for tees and crosses, such as painting, hot-dip galvanizing, electroplating, and shot blasting, which can improve their corrosion resistance and aesthetics.