1. Metal sheet:

General thin steel plate: has outstanding processing performance and structural strength, but is prone to rusting;

Galvanized steel sheet: surface galvanized, with rust prevention effect, generally used to create a damp environment without acid mist effect;

Aluminum and aluminum alloy plates: have good processing performance, corrosion resistance, and are not prone to sparking during conflicts. They are commonly used in ventilation systems with explosion-proof requirements;

Stainless steel plate: It has the ability to resist rust and acid, and is commonly used in the manufacture of cold, damp, and worn exhaust ducts, as well as ventilation systems that require corrosion resistance in chemical environments;

Plastic composite steel plate: Spray a 0.2-0.4mm thick plastic layer on the surface of a general thin steel plate, commonly used for air conditioning systems with high dust prevention requirements and air ducts in corrosion-resistant systems at temperatures of -10 ° C to 70 ° C;

2. Non metallic materials:

Hard polyvinyl chloride plastic board: suitable for ventilation systems with acidic corrosion effects, with advantages such as surface lubrication and easy manufacturing, but not resistant to high temperatures and cold, only suitable for air environments between 0-60 degrees Celsius, and easily brittle under solar radiation;

Fiberglass: It has the characteristics of lightweight, high strength, non flammability, corrosion resistance, high temperature resistance, and cold melt resistance.

The requirements for data in the processing and manufacturing process of ventilation ducts in Jinan are carefully considered. When the surface layer of the air duct is made of aluminum foil material, in order to ensure that the surface layer is not easily damaged, regulations are made for the aluminum foil material and thickness, and regulations are made for the aluminum foil thickness of the air duct surface layer composed of aluminum foil and reinforced materials.

Secondly, the strong bonding of the inner and outer layers of the thin steel plate flange ventilation duct and the internal insulation material is one of the basic conditions to ensure the composite material. Defects in the board that exceed the area not only affect the service life of the air duct, but also sometimes reduce its insulation effect. So the defect should not exceed 6 ‰ to achieve the normal use of data in the system.

At present, non-metallic air duct materials are developing rapidly and have a wide variety of types. Due to their unique characteristics and advantages, their applications are becoming increasingly widespread. In order to ensure the use, it is proposed that the air ducts manufactured with these materials should have non combustible or flame-retardant B1 level combustion performance requirements according to the needs of the project, and their surface layer should have non combustible materials. Based on years of engineering application practice and product status in China, the low peel strength test values and aluminum foil thickness values for thermal and pressure-sensitive tapes have been specified; The width of the tape should not be less than 50mm to avoid using tape that cannot meet the strength of the pipe wall seal and the service life of the air duct. The advantage of thermal tape is that it relies on hot melt bonding, and the adhesive surface is cured at room temperature without heating, with reliable bonding strength.

Article source: Aluminum foil smoke pipe for Zhongshan range hoodwww.zsboeryuan.com