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| Place of Origin: | China |
| Brand Name: | HD BOILER |
| Certification: | ISO9001 , SGS , TUV , ASME , EN |
| Model Number: | Spiral Fin Tube |
| Minimum Order Quantity: | 1 set |
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| Price: | Negotiable |
| Packaging Details: | Iron Frame Packing |
| Delivery Time: | 30 - 60 Days |
| Payment Terms: | Western Union |
| Supply Ability: | 1500 Tons Per Month |
| Material Of Tube: | SA 210 GR.A1 | Material Of Fin: | CS |
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| Product Name: | Boiler Spiral Fin Tube | Packing: | Steel Frame |
| Application: | Boiler System And Industrial System | Certificate: | ISO9001,ASME, EN, SGS |
| High Light: | High Efficiency Industrial Boiler Fin Tube,Stainless Steel Boiler Spiral Fin Tube,SA 210 Boiler Spiral Fin Tube |
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High Efficiency Industrial Stainless Steel Boiler Spiral Fin Tube For Heat Exchange
General introduction
At present, spiral finned steel tubes are mostly winding, high frequency welding and brazing spiral finned steel tubes. The intergal spiral finned steel tubes have become t renewal product of the above three types of spiral finned steel tubes because of its long service life, stable heat transfer performance and obvious every saving effect. Their advantages are shown in the following aspects:
1. Long service life, more than 3 times as long as that of winding welded finned steel tubes.
2. Arc cutting of fin root and tube and smooth surface of fins completely eliminate the phenomenon of ash accumulation, ash plugging and slagging of other forms of fin tubes due to the uneven folding of fin root.
3. Hot rolling technology is sued to improve the density, yield strength, tensile strength and wear resistance of metal structure.
4. Because the fin and tube are integral and distributed in spiral band, the pressure bearing capacity of integral spiral finned tubes is more than 3 times of that of seamless steel tube with the same thickness and inner diameter.
5. Wear resistance, which solves the problem of serious wear of convective heating surface of coal-fired boiler due to high wind speed and high ash concentration (especially circulating fluidized bed boilers).
6. The integral fin-tube structure completely eliminates the contact thermal resistance that other fin-tube structure can not overcome. In addition, the longitudinal section of fin is trapezoidal structure, so the heat transfer efficiency is improved to the greatest extent.
7. The expanded surface heat exchange of integral spiral fin is adopted. Under the same working conditions, the heat transfer coefficient of tube bundle is 3.5-5.5 times of that of seamless steel tube with the same thickness and inner diameter, and twice of that of welded spiral fin steel tube with the same specification.
8. Fins and tubes are integral structure, so they can be used in high temperature and harsh environment. There will be no instability of heat transfer performance caused by the relaxation and shedding of fins in other forms of finned steel tubes.
Spiral finned tubes are widely used in heat recovery of boiler economizer, air preheater, and waste heat boiler, as well as heat exchange equipment in chemical industry, pressure vessel and other fields. The capacity of units used in boilers has also increased from small to large, and their applications are increasing day by day. At present, many professional manufacturers in China can produce high frequency resistance welding, brazing spiral finned tubes, and the production equipment and technology of finned tubes have been developed, designed and manufactured from importation, digestion and absorption to self-development. The quality has reached the requirements of advanced foreign standards.
Advantages of using finned tubes:
1. the heat transfer area is increased in the effective space to improve the heat transfer effect.
2. Reduce the occupancy space of heat transfer surface and reduce its volume, especially for fast-loading boilers.
3. Reduce the equipment cost and improve the safety of equipment.
4. Due to the decrease of water side pressure drop, the operation cost is reduced.
5. The stiffness of finned tubes are increased, and the seismic resistance of the tube is improved.
Manufacturing method
Spiral finned tubes can be manufactured by various ways. At present, there are several main manufacturing methods for finned tubes used in heat exchangers such as boilers and pressure vessels.
High frequency resistance welding spiral finned tube
High frequency resistance welding spiral finned tube is kind of high frequency current imported into the welded parts. By using the resistance heat generated by the current through the contact surface of the welded joints and adjacent areas, the welded contact surface can reach the plastic state of melting or semi-melting, then appropriate pressure is applied to the welded contact surface, to complete welding work of finned tubes.
Brazed spiral finned tube
Brazing spiral finned tube is a kind of metal filler with a melting point lower than that of the welded part, and then heating the brazing temperature. When the welded part is not melting, the solder melting well wets and brazes, and forms the brazing joint depending on expansion and dispersion of the contact point of the welded part, thus completing the welding of the spiral finned tube.
Integral spiral finned tube
Integral spiral finned tube is formed by extrusion and tie of thick-walled tube(billet tube) under the condition of medium frequency continuous heating.It is known as the latest method of manufacturing finned tube in domestic market. It is developed by a domestic company and the researched and developed integral finned tube as well as the self-manufactured integral finned tube manufacturine equipment have been applied for patents.
Quality Control
| 1 | Impact test and Strength calculation report with applied materials information. |
| 2 | 100%NDT(non-destructive inspection) report of steel plate, tube and electrode. |
| 3 | X-ray, γ-ray and liquid penetrant test inspection report (welding seam): to ensure the quality of the entire boiler. |
| 4 | Hydraulic test report: ensure the standard working pressure and safety. |
Company Introduction
Established in 1985,Zhangjiagang Hua Dong Boiler Co.,Ltd.(trading as HD Boiler),produces power plant; industrial; waste heat; waste incineration; biomass; organic heat carrier and electric steam boilers. Coupled with a comprehensive range of heating surfaces, HD Boiler brings to the market a unique service including boiler design , fabrication, installation, maintenance and replacement of boiler pressure parts.
Contact Person: Miss. Sandy Chen
Fax: 86- 512-58774453
Address: Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Factory Address:Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
