G-type Fintube Embedded Fintube

we are the famous exporter, manufacturer and supplier of G-Type Fintube Embedded Fintube in Gandhinagar, Gujarat, India. A helical groove 0.2-0.3 mm (0.008-0.012 in) is ploughed into the outside of the base-tube wall such that metal is only displaced, not removed. The aluminium fin is wound mechanically into the groove under tension, after which the displace metal is rolled back on each side of the fin to hold it in place. That is why this type is also called embedded finned tube. The affective thickness of the base-tube wall is the thickness beneath the groove. This type provides excellent contact, both thermal and mechanical, between fin and groove. Although the base-tube metal is exposed to the atmosphere, tests under server conditions showed that corrosion over a long period is required before any bond weakness occurs.