|Place of Origin:||China|
|Brand Name:||HD BOILER|
|Certification:||ISO9001 , SGS , TUV , ASME , EN|
|Model Number:||Spiral TYPE|
|Minimum Order Quantity:||1 set|
|Packaging Details:||Iron Frame Packing|
|Delivery Time:||30 - 60 Days|
|Payment Terms:||Western Union|
|Supply Ability:||1500 Tons Per Month|
|Standard:||ASME Standard Or GB||Material:||Stainless Steel / ND Steel / Carbon Steel / Alloy Steel|
|Bare Tube:||Cold Finished||Shipment:||Container|
Spiral Type Fin Welded Heat Exchanger Tubes For Boiler Economizer ASME Standard
1. Economiser performs a key function in providing high overall boiler thermal efficiency by recovering the low level energy from the flue gas before it is exhausted to the atmosphere.
2. Economiser recovers the energy by heating the boiler feedwater.
3. Economiser are basically tubular heat transfer surfaces used to preheat boiler feed water before it enters the steam drum or furnace surfaces.
4. Economiser reduces operating costs or economise on fuel by recovering extra energy from the flue gas.
5. Boiler economizers are heat exchange devices with finned tubes that heat a liquid, sometimes water, up to however sometimes doesn't exceed the boiling purpose of liquid.
6. We can manufacture three types of boiler economizer, bare tube economzier, H finned tube economzier and spiral finned tube economzier.
|1||Economisers also reduce the potential of thermal shock and strong water temperature fluctuations as the feed water enters the drum or waterwalls.|
|2||Increasingly stringent environmental regulations limiting nitrogen oxides and sulfur dioxide emission can also affect economizer design.|
|3||The gas-side heat transfer coefficient is much less than water side heat transfer coefficient. To compensate this, outer surface of the tubes may be finned to increase the surface area of heat transfer.|
|4||The ultimate goal of economizer design is to achieve the necessary heat transfer at minimum cost.|
|5||A key design criterion for economizer is maximum allowable flue gas velocity. Higher velocity provide better heat transfer and reduce capital cost.|
|Fin tube thread pitch||5-30|
|Fin tube length||≤12000|
Material:Carbon Steel,Alloy,Austenitic Steel(Nickel and Chromium or Manganese)
|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.|
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.