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| ชื่อแบรนด์: | Yuhong |
| เลขรุ่น: | ASTM B111 C68700 ท่อครีบต่ำ |
| ขั้นต่ำ: | 2 ชิ้น |
| ราคา: | โปร่ง |
| เงื่อนไขการจ่ายเงิน: | TT, LC |
| ความสามารถในการจัดหา: | ตามความต้องการของลูกค้า |
ASTM B111 C68700 Low Finned Tube For Heat Exchanger in Marine Applications
An ASTM B111 C68700 Low Finned Tube is a high-efficiency heat exchanger component made from a specific corrosion-resistant copper alloy. Its defining characteristic is the addition of thousands of small "fins" rolled directly out of the tube's outer surface, which significantly increases the surface area available for heat transfer.
1. Tube Material: ASTM B111 C68700
(1) Chemical Composition
The table below shows the standard chemical composition for C68700, which is consistent across all product forms.
| Element | Percentage (%) |
| Copper (Cu) | 76.0 - 79.0 -2-5 |
| Zinc (Zn) | Balance (approx. 20%) -2-3 |
| Aluminum (Al) | 1.8 - 2.5 -2-5 |
| Arsenic (As) | 0.02 - 0.10 -2-5 |
| Iron (Fe) | ≤ 0.06 -2-5 |
| Lead (Pb) | ≤ 0.07 -2-5 |
(2) Mechanical Properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| Annealed (O61) | 345 min. -9 / 360 -2 | 125 min. -9 / 80-90 -2 | 50 -2 |
| ¼ Hard (H02) | 450 | 250 | 25 |
| Hard (H04) | 600 | 540 | 10 |
2. Fin Tube Type: Low Finned
The fins are not separate pieces attached to the tube; they are "integral," meaning they are cold-rolled from the base tube material itself. This process creates a tube with a much larger external surface area compared to a plain tube, which dramatically improves its ability to transfer heat.
In essence, an ASTM B111 C68700 Low Finned Tube combines a proven, corrosion-resistant material (Arsenical Aluminum Brass) with an efficient surface-enhancing design (integral low fins) , all manufactured to a strict industry standard (ASTM B111) . This combination makes it a highly effective and durable component for demanding heat exchange applications.
3. The advantages of ASTM B111 C68700 Low Finned Tube
Enhanced Heat Transfer
Superior Corrosion Resistance
Structural & Mechanical Integrity
Economic Efficiency
4. Core Applications
| Application Area | Specific Uses | Key Benefit / Why This Tube is Used |
| Power Generation | Surface condensers and cooling systems in thermal, nuclear, and geothermal power plants. | Withstands high-velocity cooling water and provides reliable, long-term performance. |
| Marine & Offshore | Shipboard condensers, seawater cooling systems, and offshore platform heat exchangers. | Exceptional resistance to seawater corrosion, impingement attack, and erosion-corrosion . |
| Desalination | Evaporators and heat exchangers in seawater desalination and saltwater treatment facilities. | Handles the highly corrosive nature of saltwater and brine effectively. |
| HVAC & Refrigeration | Evaporators, condensers, and chillers in large central air conditioning and industrial refrigeration systems. | Compact size and high heat transfer efficiency are crucial for these systems. |
| Chemical & Petrochemical | Heat exchangers in processing plants, oil coolers, and systems handling aggressive media. | Suitable for corrosive environments and provides efficient thermal management. |
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