The specification, size and form of the air outlet in the clean room shall meet the design requirements, and the surface shall be flat and free of deformation. The self-contained regulating part shall be flexible, free from jamming and loosening. The air outlet sprayed on the surface shall be of uniform color, without color difference and surface scratch. When the air duct is not connected with flange, the specification, thickness and strength of flange insert and spring clip shall meet the design and application requirements; the air valve and flexibility shall meet the design and application requirements When flange connection is adopted for short pipe, hood and muffler, the flange specification shall match with that of air duct flange.
Before the fabrication of air duct supports and hangers, the section steel should be corrected first. The correction methods usually include cold straightening and hot straightening. The small steel should be generally cold straightened, and the larger section steel should be heated to about 900 ℃ for correction. The correction sequence is to correct the distortion first, and then to correct the bending; the bolt holes and cut-off of supports and hangers should be machined, and it is not allowed to use electric welding to cut and hold hoop The circular arc shall be consistent with the outer diameter of the air duct, and the welding of the supports and hangers shall be neat and beautiful in appearance, and the welding shall be firm and thorough, and there shall be no defects such as lack of welding, missing welding, cracks and undercutting; the suspender shall be straight, and the thread shall be complete and smooth; the hanger rod shall be properly cut according to the installation elevation of the air duct, and the length of the nut exposed at the lower end of the suspender shall not be too long.
The connection of air duct interface shall be firm and tight, the gasket material of air duct flange shall meet the requirements of system function, the thickness shall not be less than 3mm, the gasket shall not protrude into the pipe or protrude from the flange; the installation of flexible short pipe shall be moderately tight without distortion; the connection between air duct and brick and concrete air duct shall be in the direction of air flow, and the insertion end of air duct shall be flush with the surface of air duct and shall be tight Sealing.
The joint of air duct shall be complete without defect, and the two planes of air duct connection shall be straight and straight without obvious distortion; the surrounding gap of socket type air duct shall be consistent without obvious bending or fold; the sealant applied inside shall be complete; the sealing tape attached externally shall be firmly and completely pasted; the air duct intercepted in the form of thin steel sheet flange, and the spacing of elastic insert, spring clip or fastening bolt shall not be greater than and distributed Even, no looseness; the horizontal deviation of open air duct is 3 ‰, and the total deviation should not be greater than 20 mm. For the vertical installation of open air duct, the vertical deviation is 2 ‰, and the total production should not be greater than 20 mm.
The position of concealed air duct should be correct without obvious deviation; the installation of spiral air duct should be connected without flange, and the round air duct installed on the support should be provided with bracket; when the air supply branch pipe and main pipe are connected vertically, the air guide regulating device should be set at the interface. Zhongjing global purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and clean rooms.