What is stainless steel spiral duct？

The stainless steel spiral air duct is made of stainless steel. The material is strong, easy to maintain integrity, beautiful appearance, smooth inner wall, small resistance, good airtightness, high-pressure strength, and can be suitable for very complex exhaust engineering. It can eliminate combustible and non-combustible chemical corrosive gases without the need to install additional sprinkler equipment. Due to its excellent corrosion resistance, heat resistance, high strength, and other physical and chemical properties, it is widely used in a variety of process exhaust systems, solvent exhaust systems, organic exhaust systems, exhaust systems, outdoor parts of general exhaust systems, damp and hot exhaust systems, smoke and dust removal systems with high airtightness requirements.

Types of stainless steel spiral ducts

The spiral air duct market is generally divided into three categories according to the material: galvanized spiral air duct, stainless steel spiral air duct and composite spiral air duct. Among them, the stainless steel air duct has the best quality and strong applicability, but the price is high. At present, the most widely circulated spiral air duct on the market is galvanized sheet. Galvanized sheet spiral air duct is basically the characteristics of stainless steel spiral air duct, but the price is only two-thirds or even lower than that of stainless steel air duct. Composite spiral air ducts are generally used in places where the external environment is relatively common and the requirements for air ducts are not too high.

Features of stainless steel spiral duct

Because iron sheets are prone to chemical reactions in various environments, causing corrosion and rusting. Zinc, on the other hand, hardly changes in dry air. In humid air, a dense basic zinc carbonate film is formed on the zinc surface. The spiral air duct is mainly coated with a layer of zinc on the iron sheet of the air duct to protect the iron sheet. The protective and decorative properties of zinc coating can be significantly improved after passivation treatment, dyeing or coating with light protectant.

The main advantages of stainless steel spiral duct

The installation of the spiral air duct significantly reduces the connection points between the pipes and minimizes the leakage at the joint of the pipe fittings. The length of the typical spiral air duct is 3~6m, while the length of the typical rectangular air duct is only 1.5 meters. ~1.5m; and only one fitting is required to connect two spiral ducts, while the connection of traditional rectangular ducts often requires a completely independent double flange system. Standardized product. The production of fittings (pipe fittings and joints) for spiral air ducts is highly automated, systematic, and has industrialized quality control. Installation costs are low. The installation time of a circular duct system is only 1/3 of that of a similar rectangular duct. Usually requires less installation space.

Without adding any pressure drop, a 200mm diameter circular pipe can replace a 250×150mm rectangular pipe in the same installation space. Several parallel round pipes can replace flat rectangular pipes without adding additional installation space. All things considered, circular ducts take up less space than rectangular ducts in the vast majority of cases. For the same pressure characteristics, the installation space of several circular pipes is often the same or less than that of a rectangular pipe. Many rectangular duct systems require a 4-bolt system to install, adding 40 to 80mm.