S M I High Fin Tube is an integral extended surface tube designed primarily for applications, which require high outside-to-inside surface area ratios, such as direct fired water heaters, boilers, and applications for heating or cooling gases.

This integral high-finned products is manufactured to a controlled inside diameter to allow insert type end connections or with the fins moved from the tube ends (stripped ends) for expanding into tube sheets or insertion into other end connections. Minimum wall thickness is held to meet code requirements for pressure designs. Maximum fin diameters are held to permit control of tube spacing.

S M I High Fin tube may be manufactured to meet the requirement of the ASME Pressure Vessel Code.

All sizes are produced in DHP Copper (UNS C12200) and in Aluminum (6000 series), and some sizes are available in 90/10 Copper Nickel Tubes (UNS C70600).