Delivery Time:1 - 30 Days
Certification:ISO9001:2008

High Efficient Copper Spiral Finned Tube for Tankless Water Heater

Quick Details:

1. Roll forming process

2. Higher heat transfer ability comparing to HF welding and Wrapped fin tube

3. Save cost and assembling space due to higher efficiency

4. ISO 9001:2008 quality certified

5. Well sold in USA, Australia, Germany, etc. 

Tube Number Code System

Take Tube Number M-11045.180100.00 as example

M	11	045	180	100	00
M=Medium Height  H=High  L=Low	Minimum fins per Inch	Fin Height in 1/10 mm	Minimum Root Diameter in 1/10 mm	Root Wall-thickness in 1/100 mm	Code of Inner Surface  00=plain  01=Undulated  02=Grooved

Descriptions:

Process Flow:

1. Order raw material based on customers\' request.

2. Inspection on raw material when arrived

3. Roll forming the fin tube, while monitoring the whole process

4. Cut into customized length 

5. Inspection on specification of finned tube

6. If required, we provide de-fin process, soft annealing, bending and coiling, welding connectors

7. Clean procedure, pressure test, drying and packing

Finned tube:

The finned tube provide by us is Extruded Type, which is different from the ones through HF Welding and Wrapping method. The fins are obtained by roll forming the outer surface of a soft seamless plain tube. The technology simply squeezes the wall thickness transforming into straight fins on the tube. So the fin and the tube are integrated and inseparable, which avoids the heat resistance between fin and tube, and optimizes heat exchange efficiency. Based on this structure, the Extruded type can survive more severe working conditions than other finned tubes. Also it, on the other hand, shows several unique features such as enhanced physical structure, resistance to vibration, anti-corrosion ability, and long service life, etc.

Under this technology, there are two major types of finned tubes available with us, Single metal tubes and Bimetallic tubes. The former uses Copper, Aluminum, and Copper Nickel alone. The later has a core tube on the inside made of harder material. In this case, the outer tube is rolled onto the core tube in order to provide for a tight bond and good thermal contact between the two tubes.

Customized finned tube is available. The specification table is followed below. If required, the fin tube can be made into various forms after soft annealing process. They can be used for cooling and heating in a large scale of conditions. For example, coils in water heater, oil cooler in large machines, heat transfer part in boiler and heat recovering system, air-conditioning and refrigeration industry as condenser part or evaporator part, etc.

The material for our fin tube covers Copper(C10200, C12000, C12200), Copper Nickel(C70600), Aluminum(1060), Aluminum alloy, Aluminum-Steel(bimetallic), Aluminum-Stainless Steel(bimetallic), Aluminum-Copper(bimetallic), Aluminum-Copper Nickel(bimetallic), Copper-Copper Nickel(bimetallic). 

Specifications:

Customized Outside diameter and Inside Diameter
Fin Height	0~12mm
Fins per Inch	5~26
Fin Thickness	0.3~0.5mm
Wall thickness	0.7~2mm

Advantage:

1. Optimized inner to outer surface ratio

2. High heat exchange rate

3. Enhanced structure due to the roll forming process

4. Flexible as straight tube or bent or coiled heat exchangers

5. Low heat resistance between fins and tube

6. Strong resistance to shock and thermal expansion and contraction

7. Cost and energy saving due to long service life and high exchange rate

Applications:

The fin tubes are mainly used in heating(gas-fired boilers, condensing boilers, flue gas condensers), in mechanical and automotive engineering(oil coolers, mine coolers, air coolers for diesel engines), in chemical engineering(gas coolers and heater, process cooler), in power plants(air cooler, cooling tower), and in nuclear engineering(uranium enrichment plants).