The air duct in the air duct processing shaft is vertically installed. Due to the small space and inconvenience for future maintenance, the air duct is generally connected with an outer sleeve angle steel flange to increase the firmness and strength of the connection point, and the flange is made into a "well" shape. The hanging bar is directly suspended on the lifting lug of the angle steel flange without additional supports.
When the air duct is processed, it is not allowed to set reinforcement frame or reinforcement bar inside it. If it is added, it will affect the quality of the air duct.
The connection mode of C-type right angle and S-type inserts cannot be used in Jinan air duct processing. For some special air ducts, snap joint cannot be used. After the ventilation pipe is made, it needs to be cleaned with cleaning solution, and it can be sealed after reaching the standard.
During the processing of the air duct, the longitudinal joints shall be reduced, and the transverse joints shall not occur. The joints of the air duct shall be sealed with sealant according to the design cleanliness level requirements. The sealing surface of the plate joints of the air duct shall be set at the positive pressure side of the air duct wall. Anti corrosion measures shall be taken during the processing of ventilation pipes, and pipe parts shall be galvanized.
After the fabrication of the ventilation pipe, it shall be cleaned with cleaning solution. Only after the cleaning standard is reached, can it be sealed in time.
If it is a color coated steel plate ventilation duct, the inner wall should be kept smooth, and the coating should not be damaged during the processing of the air duct. If the damaged part appears, it needs to be painted on the surface with epoxy resin. In the process of processing other air ducts, anti-corrosion measures shall be taken, and pop rivets shall not be used. In addition, these parts shall be galvanized during the assembly of air duct parts.
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