Suzhou Qiaohui HVAC Introduction: What is the thickness tolerance of stainless steel ventilation pipes?

Generally speaking, the thickness tolerance of stainless steel ventilation pipes is about 10%. However, there will be some changes in different standards and practical applications. The following are some common situations:

Divide by standard

GB/T 14975-2002: For some stainless steel pipes, the tolerance of wall thickness is about+12%/-10%, such as pipes with an outer diameter of 10-30mm and a wall thickness of 1.0-3.0 mm..

GB/T 14976-2002: In some specifications, the tolerance of wall thickness is about+15%/-15%, such as pipes with an outer diameter of 6-10mm and a wall thickness of 0.5-1.0 mm..

According to the production process

Air duct made of cold-rolled stainless steel plate: its thickness tolerance is relatively small, generally between 5% and 8%. Because the cold rolling process can make the thickness of the plate more uniform and the precision higher. For example, cold-rolled stainless steel plates are often used to make air ducts in some electronic factories, laboratories and other places that require high accuracy of ventilation duct thickness, so as to better control the resistance and sealing performance of the ducts.

The thickness tolerance of air duct made of hot rolled stainless steel plate is usually about 10% to 15%. The thickness deviation of the plate produced by hot rolling process is relatively large, but the cost is low and the production efficiency is high. It is suitable for ventilation systems such as general industrial plants and general commercial buildings, which are not particularly strict with the accuracy of ventilation pipe thickness.

Divided by usage scenarios

Ordinary ventilation system: For example, ventilation pipes in general offices, shopping malls and other places, the requirements for thickness tolerance are relatively loose, usually around 10% can meet the use requirements.

High-precision ventilation system: In places that require extremely high environmental control, such as aerospace and electronic chip manufacturing, the thickness tolerance of ventilation pipes may be controlled within 5%, or even stricter, to ensure the stability and reliability of the ventilation system.