Classification of Tee
Mar. 05, 2020
Divided by pipe size
The ends of the equal-diameter tees have the same size; the main pipes of the tees of different diameters have the same size, while the size of the branch pipes is smaller than that of the main pipes.
Divided by process:
The hydraulic bulging of the equal tee is a forming process of expanding the branch pipe through the axial compensation of the metal material. The process is to use a special hydraulic machine to inject liquid into the pipe blank with the same diameter as the tee, and squeeze and squeeze the pipe blank through the two horizontal side cylinders of the hydraulic machine. The pressure of the liquid increases as the volume of the tube becomes smaller. When the pressure required to bulge the tee branch tube is reached, the metal material flows along the cavity of the mold under the dual effect of the liquid pressure in the side cylinder and the tube tube to expand the branch tube. Equal tee china's hydraulic bulging process can be formed in one operation, and the production efficiency is high; the tee's head and shoulder wall thickness have increased.
Due to the large tonnage of equipment required for the hydraulic bulging process of the seamless tee, it is mainly used in the manufacture of standard wall tees smaller than DN400 in China. The applicable forming materials are low-carbon steel, low-alloy steel, and stainless steel with a relatively low tendency to cold work hardening, including some non-ferrous metal materials, such as copper, aluminum, and titanium.
Hot press forming
Three-way hot-press forming is to flatten a pipe blank larger than the diameter of the three-way pipe to a diameter of the three-way pipe, and open a hole at the position where the branch pipe is stretched; the pipe blank is heated, placed in a forming die, and A die for drawing a branch pipe is inserted therein; the tube blank is compressed radially under the effect of pressure. During the radial compression process, the metal flows to the branch pipe and forms a branch pipe under the stretching of the die. The whole process is formed by the radial compression of the tube blank and the drawing process of the branch pipe. Different from the hydraulic bulging tee, the metal of the hot-pressed tee branch is compensated by the radial motion of the tube blank, so it is also called the radial compensation process.
Because the tee is pressed after heating, the tonnage of equipment required for material forming is reduced. The hot pressing tee has a wide adaptability to materials, and is suitable for low carbon steel, alloy steel, and stainless steel materials; especially the tees with large diameters and thick tube walls. This forming process is usually used.
Divided by material: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, pvc, etc.
Divided by production methods: top-making, pressing, forging, casting, etc.
Divided by manufacturing standards: national standard, electrical standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc., as follows: GB / T12459-2017, ASME B16.9, SH3408, SH3409-96, SH3410 -96, HG / T21635, DL / T 695, SY / T 0510, DIN 2615.
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