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Methods of daily maintenance of flanges by flange manufacturers
It is also known as "annealing", and the temperature range is 1040~1120℃. You can also investigate through the annealing furnace survey hole, and the large flanged pipe fittings in the annealing area should be incandescent, but not softened and sagged. Furnace body sealing (the outer shell is welded with steel plate and section steel, the trolley is welded by section steel and steel plate, the trolley is soft-touched with the furnace lining and sand-sealed to reduce heat radiation and convection loss, and effectively ensure the sealing of the furnace body. Brightness fades. The furnace should be closed and isolated from the outside air; if hydrogen is used as the maintenance gas, as long as one exhaust port is open (used to light the exhausted hydrogen). The way to check can be smeared with soapy water on the joints of the annealing furnace. Check to see if there is outgassing; among them, the relatively simple outgassing is the inlet and outlet pipes of the annealing furnace. This sealing ring is particularly easy to wear and needs to be checked and replaced frequently. During the installation and use of the flange, in order to ensure that the installed flange does not leak Oil spill.
Comparison of stainless steel and carbon steel:
1. High electronegative rate, about 5 times that of carbon steel.
2. The large linear expansion coefficient is 40% larger than that of carbon steel, and as the temperature increases, the value of the linear expansion coefficient also increases accordingly.
3. Low thermal conductivity, about 1/3 of carbon steel. In order to prevent the inter-eye corrosion caused by the heating of the flange cover, the welding current should not be too large, about 20% less than that of the carbon steel electrode, the arc should not be too long, and the layers are cooled quickly, and a narrow weld bead is appropriate.
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Contact Information
Address: 588 Chengyang Road, Yunting Town, Jiangyin City, Jiangsu Province
Contact: Mr. Tao
