Flange plate duct fabrication, installation process will use a lot of artificial angle flange galvanized spiral duct, it consumes a lot of angles, rods, bolts, paint and other materials, as well; the production of precision, low working efficiency galvanized flange plate duct, high production costs, and the wind pipe production, installation quality can not be ensured, is an old, backward production technology. Press the center line of the duct laying boom position to identify, single boom on the center line duct galvanized duct, double boom can pitch or centerline symmetry duct installation by bolt holes of the tray. Boom according to the form of hanging pieces hanging pieces can be welded on, can also be hung on the hanging pieces, painted rust after soldering should be. Galvanized flange plate duct roughness _ _ Yao Fengzhen galvanized duct provided by Lu right Tuen induced fan Limited. Lu right Tuen induced fan Limited (www.dzydfjjg.com) is located in Dezhou Wu Lu right Tuen County Development Zone. Scraps and development in the wave of market economy, currently has a high profile in 姚风振 fan, ventilation equipment, and enjoys a good reputation. Yao Fengzhen get the whole network business alliance certification, marking our service and management level has reached a new height. Yao Fengzhen staff willing to work with all people of insight and common development, for a better future.