Standard Specification for Low Finned Tubes
Carbon Steel: ASTM A 498
Stainless Steel: ASTM A 1012
Copper and Copper Alloys: ASTM B 359
Titanium and Titanium Alloys: ASTM B 891
Material:
Carbon Steel: A179, A192, SA210 Gr A1/C,
Stainless Steel: SA 213/A 213 TP304/304L, TP316/TP316L/316Ti,
Duplex Stainless Steel: SA 789 S31803/S2205,
Copper and copper alloys SB 111 / B 111 UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10,
Titanium and titanium alloys: SB 338 / B 338 GR1 GR2 GR3 GR5 GR6 GR7 GR9 GR12 GR16 GR17 etc.
Low Finned Tube Quick Details:
Fin type: Solid plain
Outer diameter (OD): 12.7mm~25.4mm
Tube length: up to 25000mm
Fin height: 1.2mm ~2.77mm
Fin thickness: about 0.3mm
Fin pitch: 30 FPI/28 FPI/26 FPI/36 FPI/43 FPI
We can provide monolithic low finned tubes with no fin section clearance (min. 5mm) in the middle of the core tube, or bent to the designed bend radius.Example:
Data sheet of Low Fin Tubes
| Plain tube (mm) | Finned section dimensions (mm) | Ratio | De | |||
| D×t | Tp | dd | dr | di | η | mm |
| 19×2 | 0.8 | 18.8 | 17 | 134 | 2.8 | 17.9 |
| 19×2 | 1 | 18.8 | 16.8 | 13.4 | 2.5 | 17.8 |
| 19×2 | 1.25 | 18.8 | 16.6 | 13 | 2.2 | 17.8 |
| 19×2 | 1.5 | 18.8 | 16.6 | 13 | 2 | 17.7 |
| 19×2 | 2 | 18.8 | 16.4 | 13 | 1.7 | 17.5 |
| 25×2.5 | 0.8 | 24.8 | 23 | 18.8 | 2.8 | 23.9 |
| 25×2.5 | 1 | 24.8 | 22.6 | 18.8 | 2.75 | 23.7 |
| 25×2.5 | 1.25 | 24.8 | 22.3 | 18 | 2.5 | 23.6 |
| 25×2.5 | 1.5 | 24.8 | 22.3 | 18 | 2.2 | 23.5 |
| 25×2.5 | 2 | 24.8 | 22 | 18 | 1.8 | 23.4 |
| 25×2.5 | 2.5 | 24.8 | 22 | 18 | 1.6 | 23.3 |
| D——Outside diameter of plain end section Dof—-Diameter of top fins Dr—–Root diameter of finned section Di—–Inside diameter of finned section T——Wall thickness of plain end section Tp—–Fin pitch De—-Equivalent diameter of finned tube L——Plain tube end length |
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Low-fin (integral) tube is an extruded tube composed of short and low fins, and a high-efficiency heat-exchange tube type in which threaded fins are formed on the outer surface of the heat-exchange tube by rolling. The tube and fin are in the same piece of tube, also known as “N” fin type.
Because Low Finned Tube is an integral tube, there is only one material for the tube and fins
We offer you a wide range of materials and can expand our offering at any time to meet your specific needs in terms of thermal conductivity, mechanical properties or corrosion resistance.
Low fin tubes are mainly used in condensers and evaporators in air conditioning and refrigeration equipment, absorption refrigerators, oil coolers and other various heat exchangers; used in condensers and heat exchangers in thermal power plants and nuclear power plants. Evaporators, condensers and evaporators in marine exchangers; air coolers, diesel coolers, secondary coolers and various heat exchangers in waste heat recovery systems used in gas turbine units and the petroleum industry, used in the chemical industry of dryers and heaters.
Low-fin tubes are formed by rolling continuous spiral fins onto plain tubes. Compared with light pipes, it has a larger surface area and higher heat transfer performance, so it is widely used in various heat exchange and conduction situations.