High-Performance Embedded G Finned Tube Supplied for Oil & Gas Refinery Project in the UAE

• Client Location: United Arab Emirates (UAE)

• Product Type: Embedded G Finned Tube (Grooved Finned Tube)

• Core Brand: Datang Finned Tube

• Technical Specifications: SA179 Seamless Carbon Steel Tubes + Aluminum Fins,Outer Diameter (OD) 58mm, Fin Thickness 3.5mm, Fin Pitch 0.35″ (Approx. 7-8 FPI), Total Length 10,000mm

• Application Equipment: Refinery Cracking Unit Air-Cooled Heat Exchangers (Fin-Fan Coolers)

Project Background & Harsh Desert Challenges

An engineering procurement company from the UAE contacted Datang Finned Tube with a critical requirement for a massive air-cooled heat exchanger upgrade in a local oil refinery.

The application scenario in the Middle East presents extreme environmental challenges for heat exchanger components:

• Extreme Ambient Temperatures: Summer temperatures exceeding 50°C.

• Corrosive Environment: High atmospheric salinity combined with abrasive desert sandstorms.

• High Thermal Stress: The process fluid enters the tubes at high pressure and temperatures, requiring a finned tube that maintains zero thermal resistance degradation over time.

For this specific application, standard tension-wound fins (like L or LL type) were not an option, as the high temperatures and sand friction could loosen the fins. The client explicitly required the heavy-duty Embedded G Finned Tube to ensure maximum structural stability and continuous high thermal efficiency.

The Solution: Custom Engineering by Datang Finned Tube

To meet the strict mechanical and thermal demands of the UAE project, Datang Finned Tube manufactured a highly customized batch of Embedded G Finned Tubes.

The manufacturing process of the Embedded G Finned Tube involves a precise sequence: a geometric groove is mechanically plowed into the outer surface of the base tube, the aluminum fin is wound tightly into the groove under high tension, and the displaced tube material is then mechanically back-rolled to lock the fin securely into the tube wall. This ensures a 100% mechanical bond and excellent heat transfer up to 400°C.

Precision Dimensional Specifications:

• Finned Tube Outer Diameter (OD): 58 mm — optimized for high-volume fluid flow and maximum heat dissipation area.

• Fin Thickness: 3.5 mm — heavy-duty thickness engineered to resist sand erosion and mechanical impact in the desert.

• Fin Pitch (Spacing): 0.35 inches — mathematically calculated to prevent sand accumulation between fins while maintaining an optimal heat transfer coefficient.

• Ultra-Long Specification: 10,000 mm (10.0meters) per tube — seamless integration into large-scale industrial air coolers without intermediate welding points.

Step 1: Precision CNC Grooving (Base Tube Pre-treatment)

Utilizing Datang’s proprietary CNC grooving machinery, a spiral U-shaped groove with a depth of approximately 0.4 mm was precisely machined onto the outer wall of the SA179 steel tube. The depth was strictly calculated to ensure perfect compatibility with the fin thickness without compromising the pressure-bearing wall thickness of the base tube.

Step 2: High-Tension Embedding & Backfilling (Achieving “Zero-Gap” Contact)

The aluminum strip was wounded and embedded into the groove under extreme tension. Concurrently, specialized high-pressure tooling was utilized to mechanically backfill and compress the displaced displaced tube metal against the sides of the fin. This robust “mechanical locking” firmly secures the fins within the tube wall, ensuring they remain completely immoveable even at extreme operating temperatures up to 400°C.

Step 3: 100% Fin Pull-off Testing (Strict Factory Quality Control)

Prior to shipment, Datang’s Quality Inspection Center conducted rigorous fin pull-off tests on this batch of finned tubes. The test results far exceeded international standards, guaranteeing that the tubes could easily withstand the direct impact of high-velocity sandstorms reaching tens of meters per second in the UAE desert.

The greatest advantage of the Embedded G-type Finned Tube lies in its superior thermal performance and stability. Even in environments reaching 400°C, the Embedded G-type Finned Tube maintains a tight fit between the fins and the base tube, effectively preventing contact thermal resistance caused by thermal expansion and contraction. Furthermore, the robust 3.5mm fin thickness combined with the precise 0.35mm pitch not only guarantees structural rigidity in dusty airflow but also drastically improves overall heat transfer efficiency.

Reference Table for Common Base Tube Specifications

Additional Technical Suggestions

• Base Tube Material: For the high-temperature conditions in the UAE, in addition to wall thickness, it is recommended to use high-quality Carbon Steel 20# (ASTM A106 Gr.B) or Low-Alloy Steel (e.g., ASTM A213 T11/T22) for the base tube material. This ensures the base tube does not suffer from creep or oxidation failure at temperatures between 350℃ and 400℃.
• Length Consideration: Since the single tube length reaches 10,000mm, it is classified as an ultra-long tube. If the base tube wall thickness is too thin (e.g., less than 3.0mm), it is highly prone to bending under its own weight during lifting and transport. Therefore, a wall thickness of 4.0mm or more is highly necessary to guarantee the straightness of this batch of 10-meter-long tubes.

Quality Control: Building Trust Through Verification

At Datang Finned Tube, quality is verified, not just promised. To ensure 100% compliance with international standards (such as ASME and API 661), this batch of Embedded G Finned Tubes underwent rigorous testing.

Below are the key quality inspection and verification stages we provided to the UAE client prior to shipment:

1. Multi-Dimensional Precision Measurement

To guarantee perfect fitment in the client’s air cooler header box, every single Embedded G Finned Tube was meticulously measured. We documented and shared clear photos of the following verifications:

• Product Outer Diameter Measurement: Verifying the precise 58mm outer diameter across multiple points of the tube.

Embedded G finned tube with 58mm OD measurement by Datang Finned Tube

• Fin Thickness Verification: Confirming the robust 3.5mm fin thickness to ensure long-term erosion resistance.

G type finned tube 3.5mm fin thickness verification using caliper

• Fin Pitch & Spacing Inspection: Ensuring the 0.35″ spacing remains uniform across the entire 10.1-meter length to avoid thermal blind spots.

0.35 inch fin pitch inspection for embedded G type finned pipe

• Full-Length Verification: Confirming the exact 10,000mm total length to ensure seamless on-site installation.

10000mm ultra long embedded G finned tube full length measurement in factory

Embedded G finned tube full length 10 meters for Oil & Gas Refinery Project in the UAE

2. Fin Pull-Out Force Test

To prove the stability of the G-type mechanical lock, we conducted fin pull-out tests. The Embedded G Finned Tube from Datang Finned Tube demonstrated a bond strength that far exceeded industry standards, ensuring the fins will never loosen even under severe thermal cycling and sandstorm friction.

Anti-Corrosion Sealing & Solid Wooden Box Packaging

Considering the long-distance ocean freight from China to the UAE and the humid coastal conditions of Middle Eastern ports, packaging was critical.

Datang Finned Tube applied a comprehensive export packaging protocol:

• Rust Prevention: The exposed base tube ends were treated with professional anti-corrosion oil and sealed with heavy-duty plastic end caps.

• Layer-by-Layer Protection: Soft interlocking spacers were placed between each row of Embedded G Finned Tubes to prevent aluminum fin deformation during transit.

• Fumigation-Free Wooden Boxes: The tubes were packed into reinforced, fully enclosed wooden boxes designed for crane lifting and forklift handling, ensuring zero damage upon arrival at the Dubai port.

Export standard wooden box packaging and for G finned tubes

Embedded G finned tube wooden box packaging by Datang Finned Tube

Results & Client Feedback

The shipment arrived safely in the UAE on schedule. The client reported that the Embedded G Finned Tubes were installed effortlessly due to the flawless length control (10,100mm) and straightness. After months of operation during the peak of the Arabian summer, the refinery’s air coolers have maintained stable, high-efficiency cooling performance with zero thermal degradation.

“Since implementing the G-type finned tubes from Datang Finned Tube, the overall heat transfer efficiency of our air coolers has exceeded expectations. Even during the hottest and dustiest summer months, the contact thermal resistance remained completely unchanged. The rugged embedded structure has perfectly resisted sandstorm erosion. The equipment operates with absolute stability, and we have experienced zero production downtime due to overheating.”

If you are looking for a reliable Embedded G Finned Tube manufacturer for oil and gas, petrochemical, or power plant applications in harsh environments, Datang Finned Tube is your trusted partner. Datang Finned Tube not only helped the UAE client optimize refinery energy efficiency but also proved once again its technical leadership and uncompromising quality in the most extreme industrial environments across the Middle East.