EN10204 L/LL/KL Type Fin Tube , Overlapped Type LL Cooling Aluminum Fin Tube: The fin strip is welded continuously and spirally wound onto a polished bare tube. And the tube and fins are bonded together by using high frequency resistance welding technique; We produce both solid plain and serrated helical welded steel finned tube. And also, all spiral welding tubes could be bent in the middle or at the end of fin tubes, we call it Hairpin tubes.
ASTM B111/ B111M Copper Alloy Seamless Condense L/LL/KL Type Fin Tube: The copper strip is folded into an L SHAPE and wound onto the base tube surface under tension; The feet of the fins are joined together and cover the finned surface.
Galvanized Steel Sheet Round Spacer Rings For Wrapped Tension Fin Tubes: This spacer rings are applicable for aluminum fin tubes, as extruded fin tubes, L/LL/KL fins tubes and most used for G base fin tubes; General core tube OD is, 25.4mm,31,75mm and 38.1mm.