Unit Installation
65
Mild steel sheets
It is the cold or hot rolled Q235-B(GB700-1988) steel sheet. It is of excellent plasticity and
processability. It can be easily welded, but it is likely to rust. Therefore, paint is required for corrosion
protection.
Stainless steel plate
The stainless steel sheet contains chlorine, nickel, and copper. It is high-temperature resistant and
corrosion-proof. Its surface is white. As alloying elements contained in the stainless steel sheet are
different, so corrosion resistance to different mediums varies. It can be widely used for the duct
system under the corrosive chemical environment.
Aluminum plate
It is classified into the pure aluminum plate and the aluminum alloy. Its specific weight is small.
There is an aluminum oxide film covered at the surface. It is of excellent plasticity and acid resistance,
but it is vulnerable to be corroded by alkalis and salts. It is generally used for the ventilation ducts
under the acid environment. As the aluminum plate is quite soft, it would not generate sparks upon
collision. Therefore, it is mostly used for the ventilation duct with explosion-proof requirements.
1.3 Drain Hose
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