Phosphorus-deoxidized copper tubes (C12200) are manufactured from high-purity copper (99.9%) and treated with phosphorus to remove residual oxygen. This process improves corrosion resistance while maintaining excellent thermal conductivity, making them highly suitable for demanding heat exchanger applications, especially in water and steam service.
With outstanding durability, formability, and weldability, C12200 copper tubes are widely used in sugar mills for condensers and evaporators, as well as in refrigeration and HVAC systems where efficient and stable heat transfer is critical.These tubes provide reliable performance in transferring heat between steam, water, and air, making them a dependable solution for industries that require long service life, high efficiency, and consistent thermal performance.
C12200 copper tubes are widely used in:
- Industrial heat exchangers, condensers, and evaporators
- HVAC equipment and refrigeration systems
- Water heaters and solar thermal collectors
- Steam-to-water and steam-to-air heat transfer applications
- General piping and fluid distribution in corrosion-sensitive environments
Technical
|
Item
|
Specification
|
| UNS No. |
C12200 – BSI No. C107 – ISO Name Cu-DHP |
| Chemical Composition (%) |
Cu: ≥ 99.9P: 0.015 – 0.040 |
| ASTM Specification |
B75, B111, B395 |
| ASME Specification |
SB111, SB395 |
| Temper |
H55 (light drawn) / H80 (hard drawn) |
Properties and Metrics:
| Property |
Metric |
English |
| Density |
8.94 g/cm³ |
0.323 lb/in³ |
| Tensile Strength |
221 – 379 MPa |
32 – 55 ksi |
| Yield Strength |
69 – 345 MPa |
10 – 50 ksi |
| CTE, Linear |
17.7 × 10⁻⁶/°C @ 20–300°C |
9.8 × 10⁻⁶/°F @ 70–570°F |
| Specific Heat Capacity |
0.0920 cal/g-°C @ 20°C |
0.0920 BTU/lb-°F @ 70°F |
| Thermal Conductivity |
339 W/m·K @ 20°C |
196 BTU/ft²/ft/h/°F @ 70°F |
| Melting Point |
1083°C |
1981°F |
* The values shown above are typical reference data only and should not be used for design or engineering specifications.
FAQ
1. What is a DHP copper tube?
DHP copper tube (C12200) is a phosphorus-deoxidized copper alloy with high purity, widely used in heat transfer, plumbing, and HVAC applications. It combines excellent thermal conductivity with good corrosion resistance and superior weldability, making it suitable for condensers, evaporators, and general fluid handling systems.
2. What is the grade of DHP copper?
The standard grade of DHP copper is C12200 under the UNS designation, also known as Cu-DHP. It consists of high-purity copper (minimum 99.9%) with a controlled phosphorus content, which improves weldability, reduces residual oxygen, and enhances corrosion resistance.
3. What is the difference between C11000 and C12200?
C11000 (Electrolytic Tough Pitch copper) provides higher electrical and thermal conductivity, but its oxygen content makes it less suitable for welding or brazing. C12200 (DHP copper) has slightly lower conductivity, yet offers improved corrosion resistance and excellent weldability, making it more suitable for heat exchangers and applications requiring brazing or welding.
