LL Fin (or Overlapped) fin tube
Base tube material: SA179 SMLS OD31.8mm * 2.7mm THK * 4000mm LG
Fin Material: AL1060; OD57.2mm X 10FPIX 0.4 mm THK
Application: LL-type finned tube mainly used in petrochemical, electric power,
paper making, tobacco, building heating and other industry such as
air cooler, air heater and air heater of food industry, plant
starch spray drying system.
Manufacturing Process:
The fin is wrapped around the tube with an overlapping foot and
secured at each end,
making the trapezoidal cross-section forming by rolling combine
closely with the heat flux density distribution size. The fins
combine tightly with the tube,which makes the thermal efficiency
higher and put an end to thermal resistance that brings by the non
eliminate contact from segment gap of the string type finned
tube.and gives good surface protection to the tube. Used for
moderate temperature coolingapplications.
Working temperature: 230 ℃
Reference Drawing :
Material: Copper, Carbon Steel, Copper Stainless Steel, Alloy, Aluminium
Bare tube OD: 16-63mm Fin Pitch: 2.1-5.0mm Fin Height: <17mm
Features:
The winding technology improves production efficiency and heat
transfer, makes the average fin pitch and higher proportion between
fins and tube. At the same time, the base tube can be protected
from air erosion.
| Name | Base tube
(OD) mm | Fin Pitch
(mm) | length
(m) |
| Min | Max | Min | Max | Min | Max |
| Extruded aluminum fin tube | 8 | 51 | 1.6 | 10 | 0.5 | 20 |
| L/LL/KL aluminum fin tube | 16 | 63 | 2.1 | 5 | 0.5 | 15 |
| Embedded aluminum fin tube | 16 | 63 | 2.1 | 5 | 0.5 | 15 |
| Low fin tube | 10 | 38 | 0.6 | 2 | 0.5 | 20 |
| Spiral fin tube | 12.7 | 70 | | | 0.5 | 20 |
| ERW HF spiral fin tube | 16 | 219 | 3 | 25 | 0.5 | 28 |
| ERW HF spiral serrated fin tube | 16 | 219 | 3 | 25 | 0.5 | 28 |
| Serrated width(mm)
10 min~26 max | Serrated depth(mm)
4 min~16 max |
| ERW studded tube | 25 | 219 | 8 | 30 | 2 | 15 |
| | | | | | |
| DC ERW H/HH fin tube | 25 | 63 | 8 | 30 | 1 | 15 |
| H/HH fins | Length(mm)
60 min-150 max | Thickness(mm)
1.5 min~4 max | Width(mm)
30 min~50 max |
Capacity: 9000 meters/day
Products&Inspection Deatails:
TPI REPORT BY BV
Following documentations should be reviewed & endorsed:
Incoming inspection report for raw material including bare
tube/alu.tube / alu. strip / steel strip
Mill test cetification for bare tube
Mill test cetification for fin (alu.tube / alu. strip / steel
strip)
Mill test cetification for finned tube
Finned tubes dimension & visual inspection reports
Packaging: sea worthy with plastic cap for each edge of core tube , finned
tubes shall be put on the metal frame with wooden walls and plastic
layer be considered between tubes rows to avoid damage and
deformation of the fins
Manufacturing
FAQ
About our company
A------We have three company,
1. Aare Cun Tai Thermal Co., Ltd (Hong Kong, China)
2.Jiang Yin Cun Tai Thermal Equipment Co., Ltd (Jiangsu,
China)(Mill)
3.Jiang Yin Aare International Trading Co.,Ltd. (for export
procedure)
Besides the companies above mentioned, we don’t have any other
name.
About Our main business
A------DR(Extruded) / L(Wrapped) / LL(Overlapped) / KL-KLM
(Knurled) / G(Embeded) Fin Tube;
High Frequency Welding Fin Tube,Studded Tube, H/HH/Square Fin
Tube,Longitudinal Tube;
Elbows, Low Fin Tube,Spiral Tube, U bend , Corrugated Tube.
About Price terms
A------It could be EXW, FOB,CIF,CNF
About Payment Term
A------We usually accept payment by T/T in advance or by L/C
available against draft at sight
About Lead Time
A------Usually it takes about 35-45 days after we received your
confirmation.
However, it would depend on our production line schedule(the timing
clients place order)and the complication of the item.
About Quality Control
A----
Incoming inspection report for bare tube/alu.tube / alu. strip /
steel strip
Mill test cetification for bare tube
Mill test cetification for fin (alu.tube / alu. strip / steel
strip)
Mill test cetification for finned tube
Finned tubes dimension & visual inspection reports
About Sample
A---If you are interested in our above products, please contact us.
We can provide small samples in store for you, and you are welcome
to visit visit our factory
Our moulds can be customized,you could kindly leave an inquiry to
know more details about price, packing and shipping.
