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[China]
Trade Verify
Address: No.20 Xinghuo Road,Nanjing,Jiangsu,China
Contact name:Brian Wanqian
Dellok Yonghui Radiating Pipe Manufacturing Co.,Ltd. |
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DELLOK SA334 Gr1 EXTRUDED FINNED TUBE FOR HEAT EXCHANGER
About Us
DELLOK (YONGHUI RADIATING PIPE MANUFACTURING CO.,LTD.) was established in 2002, which is located in Jiangsu, China. After many years of development, the company now has 66 million yuan in fixed assets, more than 200 employees, and 33 technical staffs. We have 4 aluminum processing production lines, with the annual processing capacity of more than 20,000 tons; And we have 5 tube-drawing production lines; 47 fintube production lines, 1 imported production line from American with the brand of McElroy , with the annual production capacity of 12 million meters the above. Quality is the theme of eternal pursuit of winner -Production workshop- Meticulous works, standardized management system and systematic quality assurance are Dellok(YONGHUI)'s best commitment to quality. In Dellok(YONGHUI), the quality control is not only the detection of the final process, but throughout the entire production process. We implement a set of quality control and assurance systems. Each batch of pipes is sampled and tested, and records are kept as a quality guarantee for the final product.
Extruded Fin Tube Product Description:
In heat exchangers, fluid types, heat transfer surface areas, fluid velocity ve pressure play an important role. In order to increase the heat transfer surface area on tubes, fins are formed by extrusion on tubes.
Extrusion is the process of forming fins in specified thickness, height and pitch by extruding tube outer surface with special machines. By this means, the heat transfer surface of the tube can be increased. The problems caused by increasing heat transfer area more than necessary and by extension the height of the fins formed, are identified by studies made and by experience. Therefore fins are designed in most suitable way to the process.
Product selection is made by considering client requirements and places of product utilization with the calculation of efficiency and optimal product costs. For the product selection, alternative solutions are presented by taking environmental conditions and safety rules into account.
Integral extruded serpentines are generally used in cascade type condensing boilers and boilers. Serpentines that are aluminium extruded on tubes are used in hygienic hot air generators. They can also be used as Heat Exchanger in air cooled condenser, oil and steam applications.
Extruded Finned Tube Manufacturing Process:
The Extruded Fin Tubes are produced by compressing an aluminum tube, or sleeve, onto the base tube. The bloom is exposed to very high pressures which essentially "grows" the fins into the final fin profiles.This process manufacture an excellent strong joint with great resistance (fin stiffness) as well as exceptional heat transfer capabilities (longevity, temperature range). The advantage of extruded fin tubes are full protection of bare tube against corrosion and fin has high mechanical strength. Extruded finned tubes provide the most stable performance over time as compared to the other fin types. The fin is rolled from an outer aluminum tube by a process using pressure to create a rolled "pressure bond" between the liner tube and fins. The aluminum fin material completely encloses the tube, except at the ends where a tube coating can be applied.
Extruded Fin Tubes Advantages:
Easy to clean with a high-pressure water jet without deforming the fins
The tube is not mechanically stretched to adhere to the fins
Uniform and reliable heat transfer
No galvanic corrosion between the tube and fins
The fins are vibration resistant
Perfectly suited to industrial applications
Unequalled quality/price ratio for demanding applications
Extruded Aluminum Tubing Properties:
No galvanic corrosion at the base of the fins
Rugged fins, resistant to high-pressure cleaning, causing no warping or bending
Superior heat transfer capacity for the lifetime of the unit
Tubes can be shipped and cut to length and stripped at each end
Optional reducing sleeves (bell) at the end of tubes
Extended warranty available for heat exchangers using these tubes
Aluminum Extruded Tubing Applications:
Extruded finned tubes are used in high temperature conditions and corrosive atmospheric conditions such as:
operating temperatures less than 300°C;
offshore or other remote applications;
heat pipes;
dry air coolers for air, gas or oil;
air to air heat exchangers for HVAC applications;
air dehumidification in air treatment plants and energy recovery in air exhaust system.
Extruded Aluminum Tube Specifications:
| Product Specification | ||
| Tube OD | 10~51 (mm) | 0.4”~2” |
| Tube Wall Thk | 1.65~3.0 (mm) | 0.065”~0.118” |
| Tube Length | ≤18,500 (mm) | ≤60.7 ft |
| Fin Thk | 0.3~1.2 (mm) | 0.012”~0.047” |
| Fin Height | 5~16 (mm) | 0.2”~0.63” |
| Fin Pitch | 100~555 (mm) | 3~14 FPI |
| Fin Type | Extruded | |
| Material Combinations | ||
| Fin Material | Aluminum (most common grade:Alu.1100, Alu.1060, Alu. 6063) | |
| Copper | ||
| Tube Material | C.S. (most common grade: A179, A192,SA210 GrA1/C,A106 Gr B ) | |
| S.S. (most common grade: TP304, 316, 321, 347,A789) | ||
| Copper (most common grade:UNS12200,14200, 70600, CuNi70/30, CuNi 90/10) | ||
| Titanium (most common grade: B338Gr2) | ||
| Applied Temperature | 300°C | |
| Type of Service | Medium temperature, severe atmospheric corrosive environment. | |
Product Categories : Extruded Finned Tube
Fin Type: Extruded Fin Tube
Tube Material: copper, copper nickel, stainless steel, titanium etc.
Fin Material: Copper, aluminum
Aluminum extruded finned tubes using the form of the base tube covered with aluminum tube(the base tube can be carbon steel, stainless steel, copper) through machine extrusion, forming a tube fin, the fin base and the tube outer wall is close fitting, this fin tubing control can make finned tubes with high heat transfer coefficient and heat transfer performance.
Aluminum extruded finned tubes, also called [integral finned tubes" using the form of the base tube covered with aluminum tube(the base tube can be carbon steel, stainless steel, copper) through machine extrusion, forming a tube fin, the fin base and the tube outer wall is close fitting, this fin tubing control can make finned tubes with high heat transfer coefficient and heat transfer performance. Extruded Finned Tube can be made of iron, copper or aluminum tube by compound rolling, which has the advantages of tight bonding, small thermal resistance, good heat transfer performance, high strength, small flow loss, strong anti-corrosion performance, not easy to deformation under long-term hot and cold working conditions, long working life and so on.
Extruded finned tube manufacturing process
Pipe line--compressing or rolling--strip peeling--washing--pressure test--blast blowing--packaging.
The Extruded Fin Tube is formed by a bimetallic tube consisting of an aluminum outer tube and an inner tube of almost any material. The fin is formed by rolling the material from the outside of the outer tube to provide an integrated fin with excellent heat transfer performance and life. The extruded fins provide excellent corrosion protection for the base tube.
The production method of the composite finned tube mainly includes the extrusion method: the bimetallic composite tube is lined with a mandrel, and driven by the rotation of the roller blade, the composite tube is processed on the outer surface through the cavity formed by the rolling groove and the core head Out fins. The heat transfer tube produced by this method is an organic whole with its outer tube and fins, so there is no problem of contact heat loss, and it has good performance and high heat transfer efficiency.
FAQ
1. What Does Fin Tube Mean?
A fin tube is a tube that has small fins around the outside surface. These fins act as a filter and a mechanism to transfer heat from the material inside the tube to the outside space or vice versa. Fin tubes are used in applications that require a transfer of heat from a hot fluid to a colder fluid through the tube's wall. The rate at which such heat transfer occurs depends on three factors:
The temperature difference between the two fluids.
The heat transfer coefficient between each of the fluids and the tube wall.
The surface area to which the fluid is exposed.
2. Where is finned tube heat exchanger used?
Finned tube heat exchangers generally use air to cool or heat fluids such as air, water, oil or gas, or they can be used to capture or recover waste heat. These heat exchangers can used in a broad range of industries including oil & gas, power generation, marine and HVAC&R.
3. What is extruded fin tube?
Extruded finned tubes are bimetallic tubes whose outer aluminium surface is finned by cold plastic deformation. There are two major types of finned tubes available with us, single metal tubes (also called mono metallic fin tube) and Bimetallic tube (composite extruded fin tube) .
4. Why Aluminium is recommended as a fin material?
Good corrosion resistance, formability and high thermal conductivity make aluminium an ideal material for the construction of these heat exchangers. A typical brazed heat exchanger (radiator or condenser) comprises fins, tubes, sideplates and headerplates.
5. Where are extruded fin tubes used?
Extruded Fin Tubes are widely used in the refinery, petrochemical and chemical industry for:
Air-cooled condensers
Air-cooled coolers for products
Gas coolers
Gas heaters
6. How do you ensure a quality product?
We adhere to an in-house Quality System (or QMS) based on Industry Standards such as ASME, the National Board of Boilers & Pressure Vessels, and customer requirements. Our quality system is documented, audited, and enforced by our Quality Control department.
