Dellok Yonghui Radiating Pipe Manufacturing Co.,Ltd.
                                                                                                           
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24 Years
Since 2002
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DELLOK YONGHUI DIESTA Dual-Surface Finned Tubes for Heat Exchangers - 20% Length Reduction, 3% Capacity Increase

Price Negotiable
Price: $10 - 1000 /Piece/Pieces
MOQ: 1 ton
Delivery Time: 1-weeks
Brand: DELLOK Yonghui
Product Description
DIESTA is an innovative finned tube technology specifically designed for air-cooled heat exchangers. This advanced solution utilizes enhanced surfaces to improve plant efficiency and reduce construction costs while maintaining compliance with rigorous oil & gas industry standards including API 661.
Key Applications
  • LNG air-cooler fields including MR compressor inter- and aftercoolers, refrigerant coolers (desuperheater, condenser, and subcooler)
  • Ethylene quench-water air cooler fields (focus on naphtha-based crackers)
  • Gas processing plants and compression stations
  • Refinery operations
  • Available for both greenfield and revamp debottlenecking projects
Performance Benefits
CAPEX Savings
  • Up to 20% air-cooler field length reduction
  • Significant savings in structures, piping, wiring, and foundation costs
Increased Revenue
  • Substantial benefits depending on individual process conditions
  • LNG air-cooler optimization delivers up to 3% capacity increase
Environmental Impact
  • Improved CO₂ footprint through system efficiency enhancement
  • Reduction of compression work requirements
Technical Design
The DIESTA tube features a bimetallic construction with an aluminum sleeve fully covering the base carbon steel tube. External aluminum fins are embedded into the sleeve's grooves, while both airside and tubeside surfaces incorporate enhancement structures. The airside fins combine groove and dimple structures, with mechanical qualification confirming robustness against fouling and cleaning while maintaining strength comparable to standard extruded finned tubes. The tubeside includes an internal helical fin structure that increases heat transfer coefficient while controlling pressure drop.
DIESTA finned tube technology diagram showing bimetallic construction with aluminum sleeve and enhanced surface structures
Frequently Asked Questions
What is DIESTA technology?
DIESTA is an innovative finned tube technology designed specifically for air-cooled heat exchangers. It utilizes enhanced surfaces to improve plant efficiency and reduce construction costs while adhering to the robust design requirements of oil & gas industry standards, such as API 661.
What are the key applications of DIESTA finned tubes?
DIESTA finned tubes are primarily used in LNG air-cooler fields, including MR compressor inter- and aftercoolers, refrigerant coolers (desuperheater, condenser, and subcooler). They are also applicable in ethylene quench-water air cooler fields (especially naphtha-based crackers), gas processing plants, gas compression stations, and refineries. They are suitable for both greenfield and revamp debottlenecking projects.
What are the benefits of using DIESTA finned tubes?
Depending on the project objectives, benefits include: CAPEX savings with up to 20% reduction in air-cooler field length, increased revenue through up to 3% capacity increase in LNG applications, and improved CO₂ footprint through system efficiency enhancement.

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Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Dellok Yonghui Radiating Pipe Manufacturing Co.,Ltd.
Location No.18 Tianyue Road,Yanzhou,Jiangsu China
Contact Person Peter Cheng

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