Datang Finned Tube Empowers a Major Pakistani Sugar Mill to Supercharge End-Stage Drying System Efficiency
Project Background & Customer Pain Points
As one of the world’s leading sugar producers, Pakistan’s sugar manufacturing sector demands exceptional durability and thermal efficiency from its processing equipment. In sugar production, bagasse drying and end-stage material drying are critical phases that directly impact the entire plant’s energy consumption and ultimate sugar yield.
In late 2025, a renowned sugar mill located in a prime sugar-producing region of Pakistan reached out to Datang Finned Tube (Cangzhou Datang Steel Pipe Co., Ltd.). The heat exchange elements in their existing dryer had been operating in a harsh environment of high temperature, high humidity, and mildly corrosive flue gas for years. This led to severe fin loosening, increased thermal contact resistance, and corrosion scaling, causing a drastic decline in end-stage drying efficiency. To thoroughly resolve this bottleneck, the client decided to source premium-grade heat exchange components globally and ultimately selected Datang Finned Tube, a brand highly reputed in the industrial heat transfer field.
Core Demands & Technical Selection
To tackle the extremely demanding working conditions of the sugar mill’s end-stage drying system, the technical team at Datang held multiple in-depth video conferences with Pakistani engineers. The drying system not only required exceptionally high heat transfer efficiency but also demanded robust protection for the base tubes to prevent acidic flue gas corrosion.
Following precise thermal calculations and operational condition analysis, the expert team at Datang Finned Tube recommended the L Foot Finned Tube.
Why Choose the L Foot Finned Tube?
The L Foot Finned Tube (also known as wrap-on finned tube) features a unique “L”-shaped foot at the base of the fin. Under the high-tension strip-wrapping process of precision finning machinery, the L-shaped foot tightly overlaps and covers the outer surface of the base tube. This not only achieves a near-perfect metal-to-metal contact between the fin and the tube—significantly lowering contact thermal resistance—but also creates a continuous, gapless protective layer over the base tube. This effectively seals out moisture and corrosive gases present in the sugar mill’s dryer exhaust, thereby dramatically extending the service life of the heat exchanger.
Customized Product Specifications & Material Analysis
1. Bare Tube Specifications
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Tube Material: Premium SA192 Seamless Carbon Steel Tubes. These grades offer excellent elevated-temperature performance and superior pressure-bearing thermal conductivity, making them the top choice for boiler and heat exchanger systems.
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Outer Diameter (OD): 31.8 mm
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Wall Thickness (WT): 2.5 mm (Heavy-wall design ensures long-term mechanical strength and wear resistance)
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Bare Tube Length: 4000 mm
2. Fin Specifications
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Fin Material: Aluminum 1060 (1060 Pure Aluminum). Aluminum provides lightweight properties coupled with an extremely high thermal conductivity to rapidly dissipate heat from the base tube.
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Fin Thickness: 0.4 mm
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Fin Diameter (OD): 57.2 mm
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Fin Pitch: 2.54 mm (Optimized pitch maximizes heat transfer surface area while preventing ash accumulation and clogging, ideal for sugar mill drying environments)
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Finned Length: 3800 mm (Leaving 200 mm of bare tube at both ends for hassle-free on-site welding and header assembly)
The L type finned tube, fabricated using 1060 aluminum alloy strips, utilizes its extremely high ductility and thermal conductivity. It is tightly wound onto the base tube through a cold-wrapping process. The precision pitch design of 2.54mm greatly increases the effective heat dissipation area, ensuring hot air penetrates the material evenly and perfectly meeting the strict temperature control requirements of the sugar plant drying process.
Rigorous Manufacturing & Quality Inspection Process
- Base Tube Pre-treatment: The SA192/SA179 seamless tubes we use undergo strict hydrostatic testing and non-destructive testing before fin winding, ensuring the tube body is free of sand holes and cracks, guaranteeing pressure-bearing capacity from the source.
- Precision Winding: Using automated tension winding equipment, the 0.4mm thick aluminum strip is spirally wound onto the 31.8mm base tube in an L-shaped structure. During this process, we strictly control the tension to ensure the fin root fits tightly against the tube wall, minimizing contact thermal resistance and preventing fin loosening under high-temperature conditions.
- Finished Product Inspection: All L foot finned tubes undergo comprehensive chemical cleaning and pressure testing before leaving the factory, ensuring a clean, burr-free surface and outstanding corrosion resistance.
Datang SA192 L foot finned tube dimensions and quality inspection
Custom Anti-Damage Ocean Freight Packaging
Given that these L Foot Finned Tubes are 4 meters long and the aluminum fins (0.4 mm thick) are delicate, they are highly vulnerable to crushing or deformation during long-distance ocean transport. To counter this, Datang’s logistics team developed a dedicated packaging solution: custom steel-framed heavy wooden crates featuring layered segmentation. Every layer of finned tubes is isolated by soft cushioning material, ensuring “zero deformation and zero damage” during transit.For the tube ends, we adopted specialized sealing protection measures to prevent rainwater or moisture from entering the fin gaps and causing corrosion.
Bulk aluminum 1060 L finned tubes container loading for Pakistan client
Secure ocean freight packaging for 4000mm L foot finned tubes
Datang Standardized Packing Flowchart:
[Precision Testing Passed] ➔ [Surface Anti-Rust Treatment] ➔ [Layered Allocation with Soft Buffers] ➔ [Heavy-Duty Wooden Crate/Steel Frame Sealing] ➔ [Professional Forklift Loading & Securing]
Client Feedback & Benefit Evaluation
The batch of L Foot Finned Tubes manufactured by Datang Finned Tube arrived smoothly at the Pakistani sugar mill and successfully completed installation and commissioning. During the subsequent crushing season, the drying system delivered stunning performance data:
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Thermal Efficiency Boost: The overall heat transfer coefficient of the exchanger increased by approximately 22% compared to the old, legacy equipment, significantly accelerating the end-stage drying speed.
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Energy Consumption Drop: Thanks to the excellent heat transfer capability of the L Foot Finned Tube, the mill successfully reduced its steam consumption, achieving remarkable energy savings.
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Outstanding Corrosion Resistance: During the routine maintenance shutdown after the crushing season, the L-shaped feet of the fins were completely intact, with no signs of pitting corrosion on the base tube surface.
The Procurement Director of the Pakistani sugar mill highly praised Datang in a follow-up letter:
“Datang Finned Tube has demonstrated an exceptional level of professionalism. From the initial technical selection of the L Foot Finned Tube, to the incredibly secure anti-damage packaging, and finally to the flawless product quality—Datang is a highly trusted strategic partner for us over the long run!”
Every delivery of a high-quality L Foot Finned Tube represents Datang Finned Tube’s commitment to efficient industrial heat transfer worldwide. Whether in Pakistani sugar processing plants or in petrochemical, power, and HVAC industries across the globe, Datang is dedicated to creating tangible commercial value for clients through innovative technology and rock-solid quality.
If you are looking for high-efficiency L Foot Finned Tubes, KL Foot Finned Tubes, or Bimetallic Extruded Finned Tubes for your drying systems, air-cooled heat exchangers, or boiler economizers, please feel free to contact the professional team at Datang Finned Tube today!
