Product: Spiral finned tube 

Material: Carbon steel 

Size:Ф32-Ф76, could produce acc. to your request and drawing.

Used for: Spiral finned tube economizer generally used for, can greatly expand exchange heat area, reduce the probability of leakage, and enhance the heat transfer effect; not easy to accumulate dust ash clogging; adaptability to a wide range of temperature, bear high pressure, strong shock resistance, reliable work, low smoke resistance, wear volume is decreased and long service life.