1, galvanized steel pipe in Ji'nan is galvanized steel, its thickness should comply with the regulations.
2, the elbow of the air duct can be made of inner arc or inner oblique rectangular bend. When the side length A is greater than or equal to 500mm, elbow pipe deflector should be set up. The three or four buses of the rectangular air duct can be split or separated.
3, Ji'nan galvanized pipe pipe and flange connection, flanging should be smooth, the width should be consistent and not less than 6mm, and no cracks and holes, diagonal and edge sealant should be coated with sealant.
4, the flanges of the wind pipe should be made a good job. After the die is done, the geometry of the mold is checked, whether the diagonal line is in accordance with the design and specification requirements. After inspection, the blanking, straightening and drilling rivet holes (the hole distance is not more than 150mm), assembly, welding and drilling are carried out. In addition, reinforcement measures should be taken for the wind pipe with a length greater than 800. The allowable deviation and inspection method for the size of the air pipe and flange are shown in the table below.
5, during the installation process of Ji'nan galvanized pipe, we conduct the leak detection of the wind pipe. After the production and installation of the duct, it is necessary to verify the qualification before delivering the next insulation process.
6, the end of the pipe hanger should meet the requirements of regulating the height of the wind pipe. After the hanger is made well, it is installed according to the arrangement position of the wind pipe. The distance between the horizontal wind pipe is not more than 3m, and the vertical wind pipe is not more than 4m.
7. The installation of the supporting hanger, the fire valve, the electric wind valve and other parts of the galvanized wind pipe must be set up separately, and the general wind pipe is set up every 3 meters, and the method of supporting the hanger can refer to the national standard of heating and ventilation.
8, the air pipe support and hanger shall not be installed at the draught, valve, check door and automatic control department. The hanger shall not be directly fixed to the flange. Every two hanger with angle set an anti sway bracket.
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