Key Features and Differences of TP2, T2, and TU1 Copper Pipe Grades
TP2 (Phosphorus Deoxidized Copper): Contains 0.015%-0.040% phosphorus, which eliminates "hydrogen embrittlement" and provides excellent weldability for HVAC and gas line applications.
T2 (Pure Copper): High-purity copper (≥99.90%) offering superior electrical conductivity, making it the preferred choice for electrical wiring and electronic components.
TU1 (Oxygen-Free Copper): Ultra-high purity (≥99.97% Cu) with extremely low oxygen content (<0.002% P) , delivering exceptional ductility, processing consistency, and stable flare formation for critical connections.
Chemical Composition Comparison Table for TP2 T2 TU1 Copper Tubes
| Grade | Copper (Cu) Content | Key Alloying Element | Impurity Limit |
|---|---|---|---|
| TP2 | ≥99.90% | Phosphorus (P): 0.015% – 0.040% | ≤0.10% |
| T2 | ≥99.90% | None (Pure Copper) | ≤0.10% |
| TU1 | ≥99.97% | Extremely low P (<0.002%) | ≤0.03% |
Mechanical and Physical Properties of TP2 vs T2 vs TU1 Copper Tubes
| Property | TP2 Copper Tube | T2 Copper Tube | TU1 Copper Tube |
|---|---|---|---|
| Electrical Conductivity | High | Superior (highest) | Exceptional |
| Thermal Conductivity | Good | Good | Excellent |
| Weldability | Excellent (best) | Moderate | Excellent |
| Ductility / Formability | High | High | Superior (best for flaring) |
| Corrosion Resistance | Good | Moderate | High |
| Hydrogen Embrittlement Resistance | Yes (phosphorus added) | No | Yes (oxygen-free) |
| Processing Consistency for Flared Joints | Moderate | Moderate | Most stable and reliable |
Common Industrial Applications for TP2, T2, and TU1 Copper Tubes
TP2 Copper Tube Applications (Phosphorus Deoxidized Grade)
Air Conditioning Refrigerant Connection Lines
Stove Gas Circuit Connection Pipes
Electric Heating Pipes
Plumbing Systems (Hot & Cold Water Supply)
Heat Exchangers
Gas Lines Requiring High Pressure Resistance
T2 Copper Tube Applications (Pure Copper Grade)
Electrical Wiring and Cables
Electronic Components and Circuit Boards
Telecommunications Equipment for Signal Transmission
TU1 Copper Tube Applications (Oxygen-Free High-Purity Grade)
High-End Electronic Devices
Specialized Industrial Equipment
Medical Devices Requiring High Purity and Reliability
Connection Pipes Where Stable and Reliable Flare (Trumpet Mouth) Processing is Critical
TU1 copper tube is priced significantly higher than TP2 and T2 grades due to its demanding production requirements. However, for applications requiring flared connections, TU1 provides superior strain distribution uniformity and sealing reliability.
International Equivalent Grades for TP2, T2, and TU1 Copper Tubes
| Chinese Grade | ASTM Equivalent | EN Equivalent | JIS Equivalent |
|---|---|---|---|
| TP2 | C12200 (DHP Copper) | CW024A | C1220 |
| T2 | C11000 (ETP Copper) | CW004A | C1100 |
| TU1 | C10100 (OFE Copper) | CW008A | C1011 |
Packaging for TP2 T2 TU1 Copper Coils and Straight Tubes
Standard export seaworthy package (wooden boxes or crates)
Waterproof paper and plastic end caps to prevent moisture ingress
Bundled with steel straps for smaller diameter tubes
Clear labels with grade (TP2/T2/TU1), size, heat number, and quantity
Custom packaging available upon request (e.g., shrink wrap, individual bags)
Factory Equipment for Copper Tube Production
The manufacturing facility is equipped with advanced machinery to produce high-quality TP2, T2, and TU1 copper tubes:
Continuous casting furnaces with precise phosphorus addition control (for TP2)
Vacuum melting furnaces (for oxygen-free TU1 production)
Extrusion presses
Cold rolling and drawing lines for precise dimensions
Annealing furnaces (for soft, half-hard, and full-hard tempers)
Online eddy current testers for flaw detection
CNC cutting and deburring machines
Automatic flaring test equipment (for quality validation)
FAQ
Q1: What is the difference between TP2 copper tube and ASTM C12200 for HVAC applications?
TP2 copper tube is the direct Chinese equivalent to ASTM C12200 (DHP - Deoxidized High Phosphorus Copper). Both contain 0.015%-0.040% phosphorus and are interchangeable for air conditioning refrigerant lines and HVAC systems.
Q2: Which grade, T2 or TU1, has higher electrical conductivity for electronic components?
T2 copper tube (≥99.90% Cu) offers superior electrical conductivity suitable for most electronic components. TU1 copper tube (≥99.97% Cu) provides exceptional conductivity but is typically specified only for high-end electronics requiring ultra-low oxygen content. For standard electrical wiring, T2 is the cost-effective preferred choice.
Q3: Can TP2 copper tube be welded without hydrogen embrittlement risk?
Yes. TP2 copper tube contains 0.015%-0.040% phosphorus as a deoxidizer, which eliminates the risk of hydrogen embrittlement during welding. This makes TP2 significantly easier to weld than T2 grade, which lacks phosphorus addition. TP2 is the recommended grade for frequent welding applications.
Q4: Why is TU1 copper tube recommended for flared (trumpet mouth) connections?
TU1 oxygen-free copper has extremely low oxygen content (<0.002% P) and more uniform internal grain structure with reduced secondary phase particles. This results in superior strain distribution uniformity during flaring, producing more stable, reliable, and leak-free flare connections compared to TP2 or T2 grades.
Q5: What is the equivalent European standard grade to T2 copper tube?
T2 copper tube (≥99.90% pure copper) is equivalent to EN CW004A. For international orders, always request certification to either ASTM C11000 or EN CW004A to ensure compatibility with T2 specifications.
Q6: Is TP2 copper tube suitable for potable (drinking) water systems?
Yes. TP2 copper tube's phosphorus deoxidized composition provides good corrosion resistance, making it suitable for both hot and cold potable water supply lines. However, always verify local plumbing codes, as some regions may require specific lead-free or low-lead certifications.
Q7: What is the price difference between TU1 and TP2 copper tubes?
TU1 copper tube is priced significantly higher than TP2 copper tube due to its demanding production requirements (vacuum melting, ultra-high purity control). For applications not requiring extreme ductility or flaring reliability, TP2 offers better value. Request a quote with your specific grade, size, and quantity for exact pricing.
Q8: Can T2 copper tube be used for gas lines instead of TP2?
T2 copper tube can be used for gas lines but is not recommended. TP2's phosphorus addition provides superior weldability and corrosion resistance specifically for gas line applications. T2 lacks this optimization and may require additional protective measures. For gas lines, TP2 is the industry-preferred grade.
Q9: What is the minimum order quantity (MOQ) for TU1 copper tube in custom sizes?
MOQ for TU1 copper tube varies by diameter and wall thickness. For common sizes, MOQ may start from 500 kg. For custom dimensions, expect higher MOQ and longer lead times. Contact the supplier directly with your exact specifications for confirmation.
Q10: Does TP2 copper tube meet ASTM B280 standard for air conditioning?
Yes. TP2 copper tube can be supplied to meet ASTM B280 requirements (the standard for seamless copper tube for air conditioning and refrigeration field service). Always request the Mill Test Certificate (MTC) showing ASTM B280 compliance for your specific order.
Q11: What is the typical lead time for a production order of T2 copper tubes?
Standard lead time for T2 copper tube production orders is 7-15 days after order confirmation and deposit. Custom sizes or non-standard tempers may require 15-25 days. Contact the sales team with your quantity and specifications for an accurate lead time quote.
Q12: Do you provide free samples of TP2 copper tube for welding testing?
Sample policy varies by supplier. Many suppliers offer sample pieces (typically 300mm-500mm length) for a nominal fee, which may be refundable upon production order. Specify your required grade (TP2), diameter, wall thickness, and welding test purpose when requesting a sample.
