First, galvanized iron duct processing quality requirements: 1, that is sheet metal duct processing must comply with the requirements specification and design kitchen exhaust duct installation, duct size specifications must meet the design requirements, duct joints must be tightly bite, uniform width, no holes, semi-seams and bursting and other defects. 2, duct straight appearance, surface irregularities of not more than 5mm, wind pipe and flange connections are secure, smooth cuffs. 3, product protection: Duct flange After processing shall be classified neatly stacked, open place measures should be taken to prevent rain and snow, attention flange corrosion and protect the zinc coating duct. Quality tin ventilation pipe processing: In order to ensure the rigor of kitchen exhaust flange, the gasket between the flange using the sealant 8501 as a sealant material, the direction of the bolt through uniform requirement, should pay attention to tighten the tension caused by uneven wind tube distortion. According to the situation on the ground can be connected to a certain length, then the overall lifting, or to stand on the stage-by-duct section connected to kitchen exhaust pipe production, generally based on the first commercial kitchen exhaust pipe for safety engineering installation, after security branch pipe order. Require installation of fire dampers or silencers, the major side as more than 500mm, should be a single set boom. The hotel kitchen exhaust hood, Gongshu kitchen exhaust, kitchen exhaust manufacturers supplied by Hangzhou Xingda ventilation equipment. Hangzhou Xingda ventilation equipment (www.tz1288.com/shop/index_6525.html) strong, credible, in Hangzhou, Zhejiang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving ventilation Xingda innovative ideas will lead into the brilliant and you work for a better future!