Characteristics of carbon steel tee fittings

Author : admin

Update time : 2022-03-30 09:38:35

Carbon steel tee pipe fittings are generally used for regulating valve devices and drainage is adopted. Concentric tube is conducive to fluid flow, and changing the diameter has less interference on the fluid flow pattern.
Therefore, seamless tee fittings use concentric pipes with different diameters for gas and vertical flow liquid pipes. Since one side of pipes with different diameters is flat, which is conducive to discharging or discharging liquid and facilitating start-up and maintenance, the liquid pipes of horizontal devices are generally used for pipes with different diameters.
Pipes with different diameters are also called big and small heads. The diameters of pipe orifices at both ends are different. They are used to connect pipe fittings or flanges with different diameters for diameter change. At both ends of concentric and different diameter pipes, the center of the circle is on the same axis. When the pipe diameter changes, if the axis is used to calculate the orientation of the pipe, the azimuth of the pipe will remain unchanged, which is usually used to change the diameter of gas or vertical liquid pipes. Circumferential cutting at both ends of pain pipes with different diameters is generally used for horizontal liquid pipes.
Butt welded tee fittings are elbows made of hot pressed or forged steel, and their connection mode is to directly weld tee fittings with steel pipes. The main manufacturing technical indexes of butt welded tee fittings are GB / T 12459, GB / T 13401, asmeb 16.9, sh 3408, sh3409, Hg / t21635, Hg / t21631 and SY / t0510.
When the chromium content in steel reaches about 1.2%. The oxygen effect in corrosive medium forms a very thin oxide film (self passivation film) on the steel surface.
Seamless tee fittings can prevent further corrosion of the steel matrix. In addition to chromium, the commonly used alloy elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., so as to meet the structural and functional requirements of concentric tubes for various purposes. When producing concentric reducer, a certain production process shall be selected to ensure outstanding effect and function in production and processing.

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