Hangzhou Xingda ventilation equipment to undertake all types of tin ventilation engineering, ventilation engineering tin Hangzhou, Shaoxing tin ventilation project, a total of flange machining, fume purification project in Hangzhou, Hangzhou, engineering, installation and design of ventilation, fire smoke hotel kitchen project, Hangzhou central air-conditioning duct installation and other train services. The company has experienced professional and technical personnel, specialized in various industrial and mining enterprises, hotels ventilation pipe installation, ventilation ducts schools, hospitals and other ventilation and exhaust gas treatment, waste dust collection of design and installation. Advantages and disadvantages Advantage Brief composite duct of: thermal insulation effect, and can save insulation material that can be done at one time the connection flange on the duct when making long life, Shengzhou total of flange, acid, This can save a step when installing anti-corrosion paint. Manufacturing and installation costs are relatively lower than galvanized steel duct. Disadvantages: live production difficulties, a total of flange plate duct, must be produced at the factory molds, large transportation costs. The cross-sectional area of ??the composite material with air duct pipe insulation in the case do not take up much space, big drag. Quality identification: 1. Look material density, density material to manufacturers to provide tables. 2. Look surface finish. 3. knocking, knocking it sounds pleasant than efficiency, as selected tile a reason. Hangzhou Xingda ventilation equipment to undertake all types of tin ventilation engineering, Hangzhou tin ventilation engineering, a total of flange pipes, tin ventilation engineering Shaoxing, Hangzhou fume purification project, Hangzhou, engineering, installation and design of ventilation, fire smoke hotel kitchen project, Hangzhou central air-conditioning duct installation and other train services. The company has experienced professional and technical personnel, specialized in various industrial and mining enterprises, hotels ventilation pipe installation, ventilation ducts schools, hospitals and other ventilation and exhaust gas treatment, waste dust collection of design and installation. Or right-angle bend duct length was longer than 500 mm, it should increase the deflector at the elbow, so that air can pass, reduce drag. (4) Place the press in advance of design drawings to install lines, support and hanger elevation must be correct, support and hanger expansion bolts were buried part thereof shall not paint, and should remove the oil. Support and hanger can not be installed in the outlet, valves, inspection holes, etc.. It may not be directly suspended from the hanger flange. Connection (5) duct and part rented equipment is mainly used hose, material should be non-combustible or flame-retardant material. Duct installation depends on the construction site may be, may be integrally lifting, can also sub-section lifting; the order is generally installed after the first dry pipe manifold, vertical duct installation is generally carried out from the bottom. Shengzhou total of flange, a total of flange machining, Hangzhou Xingda ventilation (certified merchants) are provided 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!