KL Finned KLM Finned Tubes For Heat Exchangers
Finned tube or fin tube is a tube with finned surface,which increases their surface area and allows them to transfer heat more efficiently.
Finned tube is widely used in Heat Exchangers
KL type fin tube Also called Knurled L type finned tubes,which is a kind of finned tube with knurled on bare tube. Before winding the fins, there is a blade knurl patterns on the base tube and use the back blade winding fin strip on the tubes.The fin tube made knurling and winding at the same time.
The KL Type Finned Tube relies on maximum surface contact between the fins and the tube, which is ensured by the tension of the fin strips helically forming around the pre-knurled tube, providing improved bonding and heat transfer. The maximum working temperature of KL Type Finned Tube can reach 250°C, and the maximum working pressure can reach 3.2MPa..
KL Type Fin Tube Structure
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Finned Tube Application:
• the petroleum, chemical and petrochemical industries
• natural gas treatment
• the steel industry: blast furnace and converter systems
• power generation: steam turbine exhaust condensing
– contact condensing with cooling of circulating condensate
– fossil and nuclear power plants
• air conditioning (freon, ammonia, propane)
• incineration of household refuse
• compressor coolers, ect.
KL Type Fin Tube Manufacturing Process
The manufacturing strip is folded to from an L shape and then wound around the base tube. The feet of the fins are joined together and cover the whole of the finned surface. Both ends are clamped down to avoid unrolling through damage. Before winding the fins, there is a blade knurl patterns on the base tube, and use the back blade winding fin strip on the tubes. The finned tube made knurling and winding at the same time.
Base tube :ASTM A789 UNS31803: OD38.1 x 1.65 min. thickness x 3 meters long
Fin: KLM Al 1060 Fin: OD 69.85 x 0.4mm thick x 10FPI
- Finned Tube: Ø 25.4 x 1.65 mm thickness, Length 9144 mm – 600 Nos
Material: ASME SB-163 N08825 - Fins Size: Ø 57.15 x 0.4 mm thickness, 11 FPI – Type KLM
Fins Material: SB 209 Alloy 1060 - Unfinned Area: 35 mm
