Datang Finned Tube Empowers Pakistan Petrochemical Project: High-Efficiency Extruded Finned Tube Solution (15.875×1.65×17697)
1. Partnership Background & Client Pain Points
As the global energy and chemical industries continue to upgrade, industrial heat exchange equipment demands unprecedented thermal efficiency and durability. Recently, Datang Finned Tube, a leading brand in the global heat exchanger tube market, successfully delivered a batch of ultra-long, high-end extruded finned tubes (Extruded Fin Tubes) to a well-known large-scale petrochemical and fertilizer production enterprise in Pakistan.
The project site is located in Punjab Province, Pakistan, where summer ambient temperatures frequently soar above 45°C, and the atmosphere contains desert dust alongside minor industrial corrosive gases. The client was expanding their core air-cooled heat exchanger (Air Cooled Heat Exchanger). During the early stages of the project, their technical team discovered that traditional wrapped finned tubes suffered from a steady decline in heat transfer efficiency year after year. This degradation was driven by increased contact thermal resistance between the base tube and fins over time, heavy dust accumulation, and severe crevice corrosion.
Following multiple rounds of technical defense and rigorous qualification reviews, the client ultimately selected Datang Finned Tube—a professional Chinese brand—owing to its superior manufacturing craftsmanship, stringent quality control system, and highly competitive customization capabilities.
2. Precise Engineering: Technical Specifications & Innovation
To address the client’s requirements for a massive installation footprint, maximized heat transfer area, and a minimal number of tube connections to eliminate potential leakage risks, Datang Finned Tube custom-engineered an ultra-long span bimetallic composite extruded finned tube. The core customized technical specifications are outlined below:
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Base Tube Outside Diameter (Base Tube OD): 15.875 mm — Features a compact flow channel design that effectively accelerates fluid velocity within the tube bundle rows, significantly enhancing in-tube convective heat transfer.
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Base Tube Wall Thickness (Base Tube WT): 1.65 mm — Utilizes high-standard, pressure-resistant seamless tubes to guarantee absolute operational safety under high pressures in the Pakistani petrochemical facility.
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Single-Piece Ultra-Long Length (Length): 17697 mm (17.697 Meters) — A breakthrough in industrial manufacturing challenges! The ultra-long single-piece design drastically cuts down the number of welds required at both ends of the heat exchanger tube sheet, eliminating potential system leakage risks.
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Fin Processing Type (Fin Type): Extruded Integral Bimetallic Composite — The outer aluminum tube (Al1060) is subjected to intense mechanical extrusion force, forcing the metal structure to tightly wrap and seal the surface of the base tube.
| Parameter Item | Technical Specifications / Standards |
| Product Name | Bimetallic Extruded Finned Tube |
| Brand | Datang Finned Tube |
| Dimensions (OD x WT x L) | 15.875 mm × 1.65 mm × 17697 mm |
| Base Tube Material | High-precision seamless carbon steel/stainless steel (tailored per project) |
| Fin Material | Al1060 High-Purity Aluminum |
| Manufacturing Process | 100% Cold-extruded forming, zero contact thermal resistance, fully sealed fin roots |
The most prominent engineering highlight of this extruded finned tube is its “zero contact thermal resistance” characteristic. Under immense mechanical extrusion pressure, the outer aluminum fin structure forms an organic, seamless bond with the base tube surface. Even during long-term, intense thermal expansion and contraction cycles ranging from 150°C to 250°C, the fins will never loosen, peel off, or create crevices for corrosion. To meet the client’s demanding requirement for an ultra-long tube length of 17,697mm, Datang Finned Tube demonstrated powerful processing capabilities, ensuring the straightness of every extruded finned tube and the consistency of the fin height, perfectly fitting the client’s on-site installation space.This ensures long-term, stable heat transfer efficiency, which is the primary reason the Pakistani client insisted on choosing extruded finned tubes manufactured by Datang Finned Tube over conventional wrapped variations for their core air cooler.
Application Scenario: Harse Desert Petrochemical Air-Cooling Systems in Pakistan
In operational scenario, this batch of 15.875×1.65x17697mm extruded finned tubes is assembled into tube bundles and installed in a heavy-duty air cooler designed for high-boiling-point oil and gas fractions at the top of a major refinery. High-temperature, high-pressure hydrocarbon media flows inside the tubes, while massive industrial fans forcefully blow harsh desert monsoon winds across the exterior.
Because a single tube spans a staggering length of 17697mm, traditional production lines find it exceptionally difficult to maintain straightness and fin uniformity during the extrusion process. Datang Finned Tube leveraged its advanced, multi-machine interlocking high-efficiency extruded finned tube rolling mill production line, paired with a high-precision automated straightening system, to successfully overcome this international engineering hurdle of tube warping and twisting. The outer, high-density aluminum fins expand the air-side heat transfer area by more than a dozen times. As a result, the entire air-cooling system maintains phenomenal cooling performance even in brutal desert heat, perfectly helping the Pakistani client achieve stable factory production yields, energy conservation, and emission reductions.
Rigorous Quality Inspection Process
To guarantee that these 17.6-meter ultra-long extruded finned tubes would remain defect-free throughout ocean transit and decades of heavy operation, Datang Finned Tube conducted complete quality assurance testing exceeding standard industry thresholds:
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Dimension & Straightness Laser Verification: Utilizing high-precision laser rangefinders, each 17697mm extruded finned tube underwent full-length straightness validation to ensure flawless bundle assembly through the tubesheets.
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Hydrostatic & Pneumatic Bubble Testing: Base tubes were subject to rigorous hydrostatic pressure testing prior to entering production, followed by post-extrusion pneumatic tests to guarantee zero leakages.
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Micro-Level Geometric Inspections: Calipers and digital microscopes verified fin height, fin thickness, fin pitch, and residual base tube wall thickness on every batch of extruded finned tubes.
A Quality Control Engineer at Datang Finned Tube is currently conducting fin root bond strength tests and full-length straightness verifications on 15.875mm extruded finned tubes, ensuring that all data fully complies with international standards.
Extruded Finned Tube OD Measurement for Petrochemical Air Cooler
Extruded Finned Tube Manufacturer Fin Thickness Measure-15.875×1.65×17697
Professional Packing, Bulk Loading, and Dispatching
Transporting a massive cargo length of 17697mm across international borders introduces severe logistical challenges. The logistics division at Datang Finned Tube designed a heavily reinforced export-grade packaging and crating solution:
1 .Multi-Layer Anti-Rust & Impact-Absorbing Packing
Before leaving the factory, the open ends of each extruded finned tube were tightly sealed with dust-proof plastic plugs, and an eco-friendly anti-rust layer was applied. The tubes were separated by expanded polyethylene (EPE) foam cushioning strips at multiple anchor points to eliminate metal-to-metal friction. Ultimately, the extruded finned tubes were securely packed into heavy-duty, steel-framed, fumigation-free wooden cases.
2.High-Difficulty Loading into 40ft Containers
Standard containers cannot easily accommodate rigid wooden structures approaching 18 meters. The Datang Finned Tube shipping crew deployed synchronized multi-crane rigging to hoist and smoothly slide the heavy crates into specialized Flat Rack or extended high-cube containers, securing them tightly with multi-strand industrial steel wire ropes.
Application Results & Client Feedback
Following a safe arrival at the Port of Karachi and subsequent transit to the site, the Pakistani engineering team completed the heat exchanger bundle assembly seamlessly. After 3 months of heavy industrial deployment, the client submitted their official performance evaluation report:
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Exceptional Heat Exchange Performance: Even when subjected to Pakistan’s grueling 45°C peak summer heat, the extruded finned tubes from Datang Finned Tube showed peak heat transfer optimization. The condenser-coolers reported a 23% increase in thermal efficiency over older legacy elements.
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Zero Damage Upon Delivery: Thanks to the reinforced ultra-long crating, not a single extruded finned tube arrived with flattened fins, bending, or structural abrasions, allowing the field technicians to perform the tube-bundle insertion successfully on the first attempt.
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Long-Term Brand Trust: The client’s executive management highly praised Datang Finned Tube for its engineering consulting, rigorous quality assurance, and heavy-cargo logistics logistics. They explicitly stated that “Datang” has been designated as their premier, preferred vendor for their upcoming Phase II Air-Cooled Heat Exchanger project.
The flawless mass delivery of these ultra-long 15.875×1.65x17697mm extruded finned tubes to Pakistan once again demonstrates the leading position of Datang Finned Tube in the manufacturing of high-end industrial heat exchanger tubes. From blueprint design and technical rolling to rigorous multi-stage inspection and specialized ultra-long container shipping, the Datang team delivered an outstanding performance across the board.
No matter where your project is located or how demanding your custom specifications may be, Datang remains dedicated to providing you with zero-thermal-resistance, highly corrosion-resistant, and exceptionally durable extruded finned tube heat exchange solutions!
