Spiral Duct Unicom mainly for air circulation between the two places, played the role of ventilation. Currently on the market is the most widely used spiral duct. The kind of spiral duct market is generally divided into three categories according to the material: galvanized spiral duct, stainless steel spiral duct and complex spiral duct. Among them, the best quality stainless steel duct, applicability, but the price is high. Currently on the market, the most widely circulating spiral duct is galvanized sheet. Galvanized spiral duct, stainless steel spiral duct basic features, but the price is relatively only two-thirds of the stainless steel duct or even lower. Composite spiral duct generally used in the external environment is more general, less demanding on the duct place. Features metal prone to chemical reaction due to a variety of environments, causing corrosion, rust. While zinc hardly changed in the dry air. In humid air, the zinc surface will generate dense basic zinc carbonate film. Spiral Duct Duct mainly in iron coated with zinc, iron play a protective role against. Zinc coating after passivation, dyeing or coating protective agent, can significantly improve their protective and decorative. Spiral duct has the following characteristics: 1, the appearance of smooth, non-zinc tumor, burrs, silvery white; 2, easy to install, less connection points; 3, small ventilation resistance, ventilation and noise; 4, the strength and rigidity are good; 5 thickness are controllable within 5-107μm of arbitrary choice; 6, no hydrogen embrittlement, no temperature hazards, can guarantee the same mechanical properties; 7, can be part of the need to replace hot-dip galvanizing process; 8, corrosion good, neutral salt spray test up to 240 hours; 9, using hot-dip galvanizing method to complete, highly corrosive environment suitable for a variety of acids, bases, etc. mist; 10, according to customer requirements, designed a variety of customized wind tube. Compared with the traditional hand-knock galvanized iron pipe system, the mechanism of spiral duct has the following advantages: (1) a good seal. (2) the strength and rigidity are good. Small (3) ventilation resistance, ventilation noise, pipe than the pipe. (4) easy to install, less connection points. (5) high quality, beautiful appearance. 3 structure using materials with materials commonly used in galvanized iron (commonly called Star iron), stainless steel, soft aluminum. Material thickness: 0.3 to 1.2 mm Material width: 125 mm pipe diameter φ125 to φ1500 mm (diameter and thickness suitable tie), stepless choice. Uses spiral duct tape reel is made of metal spiral seam bite tube, circular, no welding, no leakage, watertight, and more for the supply and delivery of bulk materials, instead of the traditional tin tube (ie Hand sewn bite iron pipe). Duct is a whole mechanism, straight pipe without manual beat. Its main use is as follows: (a) air, including ventilation, such as sending fresh air and exhaust, this range is very wide, such as the factory floor, production sites of air, due to the need for harmful gases exhausted to the outside, but also need to convey to the outside air indoors. Then we should use large and small flow of air pressure pipes, spiral duct on the most suitable for use under normal circumstances galvanized iron pipes, corrosive and humid places to use stainless steel tube. (2) send cold. The most common is the central air-conditioning duct, the duct need to add insulation. Spiral duct can be put in the insulation material, beautiful in appearance. (3) hoods. Hotels, restaurants, hotels and kitchens have produced a lot of smoke, you need to discharge, using a circular duct is oil chimney. Here, the spiral duct tube called soot. (4) removal. Some plants produce a lot of dust in the workshop, the need for specialized dust removal device, in which a large pipeline of wind flow, you can use spiral duct. (5) bulk material handling. Some of the factory's production process, the need to transport loose particles, especially the share of small grains such as foam plastic spiral duct using low cost, good effect.