L/LL/KL/G Finned Tubes

Product Specification
Tube OD:	19mm to 51mm	3/4" to 2"
Tube WT:	L, LL, KL: 1.65mm to 3.0mm G: 2.11mm to 3.5mm	L, LL, KL: 0.065" to 0.118" G: 0.083" to 0.138"
Tube Length:	22000mm max	72ft max
Fin Thickness:	0.3mm to 0.5mm	0.012" to 0.02"
Fin Height:	10mm to 16mm	0.394" to 0.63"
Fin Pitch:	100FPM to 433FPM	3FPI to 11FPI
Fin Type:	L, LL, KL, G

 

Material
Tube Material:	Carbon Steel: most common grades are SA179, SA192, SA210A1, SA210C, SA106Gr.B Stainless Steel: most common grades are TP304, TP316, TP321, TP347, 2205 Copper: most common grades are UNS12200, 14200, 70600, CuNi70/30, CuNi90/10 Titanium: most common grade is SB338Gr.2
Fin Material:	Aluminum: most common grades are AL1100, AL1060, AL6063 Copper

* This table is used as a general guide to our capabilities, please contact us for any other customized cases.

 

"L" Finned Tube
The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximizing the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube.
"LL" Finned Tube
Manufactured in the same way as the "L" finned tube type except that the fin foot is overlapped to completely enclose the base tube thereby giving excellent corrosion resistance. This type of finned tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.
"KL" Finned Tube
Manufactured exactly as the "L" finned tube except that the base tube is knurled (for "KLM" only) before application of the fin foot. After application, the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube, resulting in improved heat transfer characteristics.
"G" Embedded Finned Tube
The fin strip is wound into a machined groove and securely locked into place by back filling with base tube material. This ensures that maximum heat transfer is maintained at high tube metal temperatures.

Production Capacity
Total seven L/LL/KL/G type finning lines, monthly production capacity is 220000 meters in total.

Codes and Standards
As per drawings and client's Requirements