ASTM B111 UNS C12200 DHP Copper Tube for HVAC & Heat Exchanger
C12200 Phosphorus Deoxidized Copper Seamless Tube for Heat Exchanger & Refrigeration System
1. General Introduction
UNS C12200 is a high-purity phosphorus deoxidized copper (Cu-DHP), the most widely used seamless copper tube for refrigeration, HVAC, heat exchangers and fluid transmission systems. Different from ordinary pure copper, C12200 adds trace phosphorus for deoxidation, which completely eliminates hydrogen embrittlement risk (hydrogen disease) and greatly improves welding, bending and flaring performance.
All our C12200 copper tubes are produced by cold-drawn seamless technology, featuring smooth surface, precise dimensional tolerance and stable mechanical properties. The seamless structure avoids leakage risks, making it ideal for long-term operation in refrigeration, plumbing and industrial heat exchange equipment.
2. Material Performance Explanation
C12200 phosphorus deoxidized copper maintains the excellent thermal conductivity and electrical conductivity of pure copper. Its outstanding corrosion resistance ensures stable service in fresh water, refrigerant and dry gas environments, and will not easily form oxide scale to block pipelines. This material can be processed in reducing atmosphere, suitable for various cold and hot forming processes. It is the standard preferred material for air conditioning condensers, evaporators, building water pipes and petrochemical fluid pipelines worldwide.
Full Technical Specifications
| Item | Technical Data |
|---|---|
| Standard | ASTM B88, ASTM B280, EN 1057 |
| UNS Number | C12200 |
| Main Composition | Cu+Ag ≥99.90%, P: 0.015% ~ 0.040% |
| Manufacturing Process | Cold Drawn Seamless |
| Outside Diameter Range | 4.76 mm – 168 mm |
| Wall Thickness Range | 0.4 mm – 10 mm |
| Length | Max 28000 mm or Customized |
| Density | 8.94 g/cm³ |
| Thermal Conductivity | 365~385 W/(m·K) |
| Conductivity | 88~94 %IACS |
| End Type | Plain End / Beveled End |
| Inspection | Hydraulic Test, Eddy Current Test, Visual Inspection, PMI |
| Certificate | EN10204 3.1, Mill Test Certificate (MTC) |
Product Advantages
- Excellent Welding & Processing Performance
Trace phosphorus deoxidation removes internal oxygen defects, no hydrogen embrittlement during high-temperature welding and annealing. It supports bending, flaring, stamping and other deep processing, no cracking during cold forming.
- Superior Thermal & Electrical Conductivity
High thermal conductivity ensures efficient heat exchange, perfectly matching the working requirements of heat exchangers, condensers and evaporators. Stable conductivity also meets the needs of electrical connection components.
- Good Corrosion Resistance
Resist oxidation, water medium corrosion and mild chemical corrosion. Long service life in plumbing, refrigeration and gas transmission pipelines, low maintenance cost.
- Seamless Structure & High Safety
Cold-drawn seamless manufacturing, no weld seam weakness. Withstands medium pressure and fluid impact, effectively prevents liquid and gas leakage.
- Strict Dimensional Accuracy
Precise control of outer diameter and wall thickness, consistent tolerance. Easy installation and matching with various accessories, reducing construction difficulty.
- Compliant & Eco-friendly
Fully comply with RoHS, ISO and international industry standards, non-toxic and environmentally friendly, applicable for global export projects.
C12200 VS Ordinary Pure Copper C11000
| Performance | C12200 (DHP Phosphorus Deoxidized Copper) | C11000 (Pure Electrolytic Copper) |
|---|---|---|
| Oxygen Content | Extremely low, no hydrogen embrittlement | High oxygen content, easy to crack at high temperature |
| Welding Performance | Excellent, dense weld without pores | General, prone to air holes after welding |
| Cold Bending & Flaring | Excellent, not easy to crack | Ordinary, limited deep processing |
| Applicable Atmosphere | Reducing atmosphere (long-term stable use) | Not suitable for high-temperature reducing environment |
| Recommended Scenarios | Refrigeration, plumbing, heat exchanger (preferred) | Electrical conductive parts (single conductivity demand) |
Quality Control & Inspection
- Positive Material Identification (PMI)
- Hydrostatic Pressure Leakage Test
- Eddy Current Testing (ET)
- Dimensional Tolerance Inspection
- Visual Surface Quality Inspection
- Chemical Composition & Mechanical Property Testing
C12200 copper seamless tubes application:
- Refrigeration & HVAC Industry
Air conditioning condenser tubes, evaporator tubes, refrigeration pipeline, heating and ventilation pipeline (core application).
- Heat Exchanger Equipment
Industrial heat exchangers, cooling systems for machinery and power equipment.
- Building Plumbing
- Petrochemical & Fertilizer Industry
Medium and low-pressure fluid pipelines, gas transmission pipes, chemical equipment connecting pipes.
- Automotive Industry
Automotive air conditioning pipes, heat dissipation components, wiring harness conductive parts.
- Electrical & Electronic Industry
Conductive busbars, instrument connecting tubes, precision electronic heat dissipation parts.
FAQ
- What is C12200 copper?
C12200 is UNS standard phosphorus deoxidized copper (Cu-DHP), equivalent to Chinese standard TP2. It is a high-purity copper material with low oxygen content, mainly used to produce seamless copper tubes for refrigeration and plumbing systems. - What is the difference between C12200 and C11000 copper?
C12200 contains trace phosphorus for deoxidation, no hydrogen disease, better welding and bending performance; C11000 is pure copper with higher conductivity but poor high-temperature processing performance. - Is C12200 copper tube suitable for refrigeration systems?
Yes. C12200 is the mainstream material for air conditioning and refrigeration tubes, with efficient heat conduction and reliable anti-leakage performance. - Can you provide customized sizes for C12200 copper tubes?
Yes. We support customized outer diameter, wall thickness, length, surface treatment and testing standards according to customer drawings and requirements. - What certifications do your C12200 copper tubes have?
Our products are certified by ISO, RoHS, SGS, TUV, and provide EN10204 3.1 mill test reports. Third-party inspection is supported.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.