Side Tees Wholesale Manufacturers, Suppliers, Market Quotes, Which One is the Best [Nantong Helu Building Materials Technology Co., Ltd.] By Process Classification: 1. Hydraulic Expansion: The hydraulic expansion of tees is a forming process that uses the axial compensation of metal materials to expand the branch pipe. The process involves using a special hydraulic press, injecting liquid into the billet equal in diameter to the tee, and synchronously squeezing the billet using the two horizontal side cylinders of the hydraulic press. As the billet is squeezed, its volume decreases, and the pressure inside the billet increases with the reduction in volume. When the pressure reaches the required level for expanding the branch pipe of the tee, the metal material flows and expands into the branch pipe under the combined action of the side cylinder and the pressure of the liquid inside the billet. The hydraulic expansion process for tees can be formed in one go, with high production efficiency; the main pipe and shoulder wall thickness of the tee are increased. Due to the large tonnage of equipment required for the hydraulic expansion process of seamless tees, it is mainly used in China for manufacturing tees with standard wall thickness less than DN400. The suitable forming materials include low-carbon steel, low-alloy steel, stainless steel, and some non-ferrous metals, such as copper, aluminum, and titanium. 2. Hot Forging: The hot forging of tees involves flattening a billet larger than the tee diameter to approximately the tee diameter, creating a hole at the location for the branch pipe. The billet is heated, placed into a forming mold, and a punch mold for stretching the branch pipe is inserted inside. Under pressure, the billet is radially compressed, and during this process, the metal flows towards the branch pipe and forms it under the stretching action of the punch mold. The entire process is formed through the radial compression of the billet and the stretching of the branch pipe section. Unlike the hydraulic expansion tee, the metal in the branch pipe of the hot forged tee is compensated by the radial movement of the billet, hence also known as radial compensation process. Since the tee is pressed after heating, the tonnage of equipment required for material forming is reduced. Hot forged tees are adaptable to a wide range of materials, suitable for low-carbon steel, alloy steel, and stainless steel; especially for tees with large diameters and thicker pipe walls, this forming process is commonly used.