YUHONG HOLDING GROUP CO., LTD
| Payment Terms | L/C,T/T,AT SIGHT |
| Supply Ability | According to Clients' requirements |
| Delivery Time | 45-75 Days (Depend on Customer's Requirement） |
| Packaging Details | Ply-wooden Cases with Steel Frames(both ends of pipes have plastic caps） |
| Fin Type | Low Fin Tube |
| Bare Tube Standard | ASME SB111 |
| Bare Tube Material | C68700 |
| Tube Surface | Smooth/Embossed/Grooved |
| Ends | PE/BE |
| Application | Heat Recovery Systems ,Petrochemical and Refinery Industries , heat exchangers ,Power Generation and Cooling Systems for Power Generation Equipment |
| Brand Name | YUHONG |
| Certification | ABS, BV, ISO, ASTM, SGS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T,AT SIGHT | Supply Ability | According to Clients' requirements |
| Delivery Time | 45-75 Days (Depend on Customer's Requirement） | Packaging Details | Ply-wooden Cases with Steel Frames(both ends of pipes have plastic caps） |
| Fin Type | Low Fin Tube | Bare Tube Standard | ASME SB111 |
| Bare Tube Material | C68700 | Tube Surface | Smooth/Embossed/Grooved |
| Ends | PE/BE | Application | Heat Recovery Systems ,Petrochemical and Refinery Industries , heat exchangers ,Power Generation and Cooling Systems for Power Generation Equipment |
| Brand Name | YUHONG | Certification | ABS, BV, ISO, ASTM, SGS |
| Place of Origin | China | ||
| High Light | copper alloy low fin tube ，seamless heat recovery tube ，SB111 C68700 finned tube | ||
ASME SB111 C68700 low fin tube is a heat exchanger tube made of CuNi 90/10 copper‑nickel alloy, consisting of about 90% copper and 10% nickel. It features low spiral fins that expand heat transfer surface area and improve efficiency, especially at low flow velocities and in compact spaces.The alloy offers excellent corrosion resistance, particularly in seawater, along with good strength, biofouling resistance, and resistance to stress corrosion cracking.Common specifications include an outer diameter of 1/4" to 1", standard lengths of 6–20 feet, and 3–10 fins per inch. Wall thickness and fin height can be customized. It is widely used in heat exchangers, condensers, and equipment exposed to seawater, brine, or industrial chemicals.
Base Tube Chemical Composition (%)
| Element | Copper (Cu) | Aluminum (Al) | Arsenic (As) | Iron (Fe, max) | Lead (Pb, max) | Zinc (Zn) |
| Range | 76.0 – 79.0 | 1.8 – 2.5 | 0.02 – 0.06 | 0.06 | 0.07 | Remainder |
Mechanical Properties (Base Tube)
| Tensile Strength (Max) | Yield Strength (Min) | Elongation (min) |
| 414 MPa | 105 MPa | 30% |
| Property / Alloy | C68700 (Aluminum Brass) | C70600 (90-10 Copper-Nickel) |
| Material Type | Aluminum brass with arsenic inhibitor | Copper-nickel-iron alloy |
| Key Characteristics | Excellent resistance to dezincification; Good erosion-corrosion resistance; High thermal conductivity; Cost-effective for seawater service | Superior resistance to seawater corrosion; Excellent biofouling resistance; Good impingement resistance; Stable film formation in clean seawater |
| Typical Applications | Power plant condensers, desalination plants, oil coolers, HVAC systems with seawater or brackish water cooling | Seawater piping systems, heat exchangers, condensers, desalination plants, shipboard cooling systems |
| Chemical Composition (Key) | Cu: 76.0-79.0% Al: 1.8-2.5% As: 0.02-0.06% Zn: Remainder |
Cu: Remainder Ni: 9.0-11.0% Fe: 1.0-1.8% Mn: ≤1.0% |
| Mechanical Properties (O61 Temper, min) | Tensile: ≥310 MPa Yield: ≥105 MPa Elongation: ≥30% |
Tensile: ≥275 MPa Yield: ≥105 MPa Elongation: ≥30% |
| Thermal Conductivity | ~120 W/m·K (Highest) | ~55 W/m·K (Medium) |
| Relative Cost | Lowest (Base reference) | Medium (∼1.5× C68700) |
| Maximum Velocity Limit (Seawater) | ~2.5 – 3.0 m/s | ~3.5 – 4.0 m/s |
● Heat Exchangers:
Commonly used in heat exchanger systems, such as those in power plants, HVAC systems, and chemical processing, where space constraints and the need for efficient heat transfer are paramount.
● Marine Applications:
Used extensively in seawater condensers, desalination plants, and offshore oil rigs due to the copper-nickel alloy's superior resistance to seawater corrosion and biofouling.
● Cooling Systems:
Ideal for cooling systems that require high efficiency, such as refrigeration, air conditioning, and industrial process cooling.
● Condensers and Evaporators:
In systems where heat needs to be transferred efficiently from a refrigerant or other medium, this tube is highly effective due to its increased surface area.
● Chemical Processing:
Often used in the chemical and petrochemical industries for cooling fluids or transferring heat between different chemicals, as the material resists many corrosive substances
Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
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