The reason why welded air duct has become the favorite of the market, Yunnan Acetylene tape Compared with the air duct made of traditional materials, it has obvious advantages in technology, energy conservation, environmental protection and economy. This product has been inspected, tested and proved by the National Building Materials Testing Center, the National Fire Building Materials Quality Supervision and Inspection Center, the National Air Conditioning Equipment Quality Supervision and Inspection Center, the National Non ferrous Metal Quality Supervision and Inspection Center and other relevant authorities, In addition, no smoke is generated in the fire, and the smoke density is only 4, which is 10 to 20 times that of other organic foam materials. In modern buildings, central air conditioning is very common, and ventilation ducts are an important part of the central air conditioning system. According to statistics, China's annual demand is about 100 million square meters, reaching 20 billion yuan. Among all kinds of air ducts, welded air ducts stand out for their unique excellent performance and cost performance, and are becoming the new favorite in the central air-conditioning market. The manufacturing of welded air ducts is highly automated and the production speed is very fast. Ordinary air ducts can produce 20~40 meters per minute. Due to the low price of the raw material galvanized strip steel compared with the whole galvanized steel sheet, and its factory production and specification standardization, the cost is lower than that of rectangular air ducts; In addition, the total cost is low due to the less demand for supports and hangers and the less installation work. Since the four corners of rectangular air duct are prone to turbulence, Acetylene tape Where can I find it? The effective flow area is reduced. The technology of welded air duct is very close to the international level; In terms of supporting services, more and more enterprises like this company provide high standard services. If there are any suggestions, we hope to see more and more enterprises with a sense of mission for the development of the industry.

At present, the common air ducts in the domestic market are generally made of galvanized iron sheet, commonly known as white iron sheet. high quality Acetylene tape And the thickness is 0.44~1.22mm. The thickness of iron sheet of air duct in China is generally less than 1.5mm, and the thickness of zinc coating refers to the national standard GB/T 13912-2002: 35 μ m. Average 45 μ m。 During the production of galvanized air duct, the national standard requires us to understand the following figures: 1. Appearance: conduct appearance inspection on all hot galvanized parts, and the main surface should be smooth, free of falling off, roughness and zinc spikes (if these zinc spikes will cause damage), free of peeling, missing plating, and residual solvent residue, There shall be no zinc lump and zinc ash in the parts where hot galvanized workpieces are used or where they are corrosion resistant. Note: "Roughness" and "smoothness" are relative concepts, and the coating roughness of workpiece is different from that of mechanical roller or (and) blow molding and galvanized products (such as galvanized steel plate and galvanized steel wire). As long as the coating thickness is greater than the specified value, there may be dark or light gray uneven areas on the surface of the plated parts. White rust (mainly white or gray corrosion products of alkaline zinc oxide) is allowed on the surface of galvanized workpieces stored in wet conditions. 2. Thickness: quantitative sampling shall be carried out according to the specified test method for coating thickness test. According to the size of the main surface area of hot-dip galvanized parts, the coating thickness measured in the test shall meet the following requirements: A) For parts with the main surface area greater than 2m (i.e. large parts), the average coating thickness measured on all basic measured surfaces of each part in the sample shall not be less than the minimum value of the corresponding average coating thickness: B) For parts with the main surface area less than 2m, Acetylene tape Where can I find it? The local coating thickness measured on each basic measuring surface shall not be less than the minimum local thickness, and the average coating thickness measured on all basic measuring surfaces of the sample shall not be less than the corresponding minimum average thickness.

high quality Acetylene tape The inner and outer walls are smooth, the resistance of the air duct is small, the secondary noise is not generated during air supply and exhaust, the energy consumption is reduced, and the operation cost is saved. The product can be made on site, cut, drilled, and opened, the installation is simple, and the labor and time are saved. The user's investment cost is reduced, the construction period is shortened, the performance price ratio is high, and it is cheaper than other materials. After the installation is completed, no maintenance is required, and the maintenance cost is reduced. The key points of whether galvanized sheet air duct material galvanized sheet is corroded are mainly reflected in the following three aspects: ① The first corrosion of galvanized sheet in the entire service life cycle is the oxidation of the galvanized layer on the surface, resulting in white rust. After a little longer time, the white rust on the surface further reacts with carbon dioxide and other impurities in the humid air to form black spots. When the galvanized sheet is used for a long time and the galvanized layer is severely corroded, the steel base loses the sacrificial anti-corrosion effect of zinc, and begins to oxidize to generate red rust. Once the steel base begins to oxidize, the corrosion rate becomes very fast, and the life of galvanized sheet ends. ② In addition, there are two special corrosion conditions of galvanized sheet, namely, black stain. One is that after being used for a period of time, due to the influence of lead and other elements in the zinc coating, the galvanized sheet will become black in the matte part of the zinc flake. The blackened zinc coating still has a protective effect on the steel base, but has a certain impact on the service life. ③ Acetylene tape Where can I find it? It has excellent corrosion resistance in dry or pollution-free environment. However, in the polluted environment, the service life will be greatly shortened, so it is necessary to pre coat the film into color plates before use.

Common for ventilation duct high quality Acetylene tape What should be paid attention to during processing: the galvanized air duct shall not be connected with s-shaped, c-shaped right angle and vertical angle plugs. Clasp type air duct shall not be used for Grade 1 to 5 clean air. The rivet spacing of air duct shall be less than 100 mm. When the air purification level is 1-5, the rivet spacing of air duct shall be less than 65 mm. Before processing the galvanized air duct, use cleaning solution to remove the oil stain and dust on the surface of the plate. The cleaning solution shall be a neutral detergent, which will not damage the board surface, and will not produce dust after drying, so it will not be harmful to human health. Clean the vent pipe with cleaning solution after fabrication. After cleaning, the electric board shall be sealed in time after the white silk cloth cleaning inspection meets the requirements. The inner wall of color coated steel pipe shall be smooth, and the coating shall not be damaged during steel plate processing. The damaged parts shall be coated with epoxy resin. The galvanized air duct seamed joints, riveted joints and flange flanged corner joints shall be sealed with sealant or other sealing measures according to the design and cleaning level requirements. The sealing materials shall be isobutyl rubber, chloroprene rubber, modified silica gel, etc. The sealing surface of the air duct plate joint shall be located at the positive pressure side of the air duct wall. The production site of galvanized air duct shall be relatively closed, and the production site shall be paved with soft materials that are not easy to produce dust. The galvanized air duct shall have fewer longitudinal joints, glass fiber reinforced plastic ventilation pipes, and no transverse joints. Acetylene tape Where can I find it? The processing of connecting bolts, nuts, washers and rivets shall be galvanized or other anti-corrosion measures, and blind rivets shall not be used.

What is stainless steel spiral duct? Acetylene tape Where can I find it? The products are mainly used to connect the air flow between two places and play the role of ventilation. There are three types of galvanized spiral air ducts, stainless steel spiral air ducts and composite spiral air ducts. Here we mainly talk about the stainless steel spiral air duct, and briefly analyze the reason why it is widely used in villas. The so-called stainless steel air duct is strictly a kind of air duct processing technology, also known as spiral seamed thin-walled tube. The best quality is the thin-walled tube with spiral seamed made of metal strips. Because the applied material is metal, it is also called spiral seamed metal tube. It was first used in the military industry of western countries, such as ships, ship ventilation, air conditioning systems, and later used in trains Subway, mine and other civil facilities. By 2000, according to statistics, 95.6% of office buildings, shopping malls and subways in the United States had applied spiral air ducts. In civil residential buildings, 72.5% of central air conditioners use spiral air ducts. Since the mid-1990s, China has introduced this technology into the shipbuilding industry. With the rapid development of China's economy, the use of central air conditioners has increased year by year, and the quality of auxiliary products for exhaust and air supply has been continuously improved. Spiral air ducts have been widely used in some villas. (1) Product standardization: The production of spiral round air duct fittings (pipe fittings and joints) has been highly automated, systematic, and has industrialized quality control. It is well known that the wind resistance of circular duct is much smaller than that of rectangular duct. (2) Easy to install. The installation of spiral air duct significantly reduces the connection points between pipes and minimizes the leakage at the joint of pipe fittings. The typical spiral air duct is 3~6m long, while the typical rectangular air duct is only 1~1.5m long; The connection of two spiral air ducts requires only one pipe connector, while the connection of traditional rectangular air ducts often requires a completely independent double flange system. (3) Usually only small installation space is required: the same high quality Acetylene tape The circular pipe with a diameter of 200mm in the installation space can replace 250 × 150mm rectangular pipe. On the premise of not increasing additional installation space, several parallel circular pipes can replace flat rectangular pipes.

Many people don't know much about spiral tube. In fact high quality Acetylene tape It is very extensive. Spiral air duct is mainly used to connect the two places for ventilation. Spiral air ducts (stainless steel and galvanized iron sheet) are widely used in the market. Spiral air duct market is generally divided into three categories according to material: galvanized spiral air duct, stainless steel spiral air duct and composite spiral air duct. Among them, the stainless steel air duct has good quality and strong applicability, but its price is high. The return air duct of purification system, central air conditioning ventilation duct, industrial air supply and exhaust duct, environmental protection system suction and exhaust duct, mine gas drainage duct, mine coating duct, etc. The spiral duct is first used for ventilation and cooling, which belongs to the category of air duct. It is named according to its purpose, but it can also be used in other places, even for drainage, drainage or as a container, which cannot be called a pipe. Named according to the structure, it should be called spiral grooved thin-walled tube, because it is mainly made of metal, also called spiral grooved metal tube. According to the material name, there may be several names: galvanized (any zinc) (galvanized) (iron), spiral pipe, stainless steel spiral pipe (stainless steel acid resistant steel), aluminum (aluminum) spiral pipe, or in order to distinguish from the existing acid resistant stainless steel pipe, Acetylene tape Where can I find it? It can be called ultra-thin stainless steel pipe, because it can use 0.3mm or even thinner to roll stainless steel strip.