Galvanized air ducts and stainless steel welded air ducts have different applications in the following aspects:

First, material characteristics

1. Galvanized air pipe:

- The main material is galvanized steel plate, which has good corrosion resistance, but is slightly inferior to stainless steel. In the general ventilation environment, it can effectively resist moisture and mildly corrosive substances in the air, and its service life can reach several years to more than ten years.

The galvanized layer can prevent the steel plate from rusting to a certain extent, but its anti-rust ability will gradually decrease with the passage of time and the harsh use environment.

- The strength of galvanized air ducts is moderate and can meet the installation and use requirements of conventional ventilation systems, but in some cases that need to withstand high wind pressure or mechanical stress, additional reinforcement measures may be required.

2. Stainless steel welded air duct:

- Made of stainless steel, the common models are 304, 316 and so on. Stainless steel has excellent corrosion resistance, can resist a variety of strong acids, alkali, salt spray and other corrosive media erosion, suitable for chemical industry, food processing, pharmaceutical and other places with high air quality requirements.

- Stainless steel has high strength, good pressure resistance and seismic performance, can maintain a stable structure under harsh working conditions, and is not easy to deformation and damage.

Stainless steel material also has good high temperature resistance, it is not easy to oxidize and deform in high temperature environment, and can be used in some high temperature ventilation systems, such as kitchen exhaust pipe.

Second, the production process

1. Galvanized air pipe:

- It is generally made and installed by means of bite connection or flange connection. The bite connecting process is relatively simple, the cost is low, but the sealing is relatively poor, and it is suitable for medium and low pressure ventilation system.

- The galvanized layer needs to be protected during the production process to avoid scratching and damage, so as not to affect its corrosion resistance.

- The appearance of the galvanized air duct is more common, the surface is the metal color of the galvanized layer, and it can be painted or other surface treatment according to the need to meet the different decorative requirements.

2. Stainless steel welded air duct:

- Mainly adopts the method of welding connection, welding process requirements are high, the need for professional welding equipment and technical personnel to operate. The air duct after welding has good sealing and can withstand high pressure and wind speed.

- In the production process of stainless steel air duct, attention should be paid to controlling welding deformation to ensure the dimensional accuracy and shape regularity of the air duct.

The appearance of stainless steel air duct is bright, with good decorative effect, and it can meet the aesthetic requirements of most places without additional surface treatment.

3. Application scenarios

1. Galvanized air pipe:

- Widely used in general commercial buildings, civil buildings ventilation and air conditioning system, such as office buildings, shopping malls, hotels, etc. The requirements of the ventilation system in these places are mainly to meet the basic air circulation and temperature regulation, and the performance and cost of galvanized air ducts can meet their needs.

- In some industrial plants, if the air quality requirements are not high, and the environment is less corrosive, galvanized air pipes can also be used. For example, some ordinary machining workshops, warehousing logistics centers and so on.

2. Stainless steel welded air duct:

- Often used in places with strict air quality requirements, such as food processing plants, pharmaceutical factories, electronic clean workshops, etc. These places need to ensure that the ventilation system will not have an impact on product quality, and the corrosion resistance and pollution-free characteristics of stainless steel ducts can meet the requirements.

- In chemical, petroleum, metallurgy and other industrial fields, due to the existence of various corrosive media and high temperature, high pressure and other harsh working conditions, stainless steel welded air pipe is the preferred ventilation pipe material.

- Kitchen fume exhaust system is also an important application field of stainless steel air duct, and its high temperature resistance and corrosion resistance can effectively cope with the erosion of fume and high temperature environment.