What is TP1/C12000 copper?
Purple Copper (Red Copper), named for the purplish-red color it develops upon surface oxidation, is an important non-ferrous metal material widely used in both industrial and everyday applications. It is highly valued for its excellent electrical conductivity, thermal conductivity, ductility, and corrosion resistance. Among the many grades of purple copper, TP1 is a specific model with defined composition and applications.
To understand TP1 purple copper tubes, it is first necessary to grasp the meaning of the TP1 grade. According to national standards, copper grades are typically composed of letters and numbers-"T" stands for copper, and "P" indicates that it is phosphorus-deoxidized copper. The "1" in TP1 specifies that the residual phosphorus content falls within a particular low range.
Material Characteristics of TP1 Purple Copper
Excellent Weldability and Brazability: Due to its low oxygen content, it does not suffer from "hydrogen embrittlement" during high-temperature welding-a phenomenon where hydrogen reacts with internal copper oxide to form water vapor, leading to cracks-ensuring strong and reliable welded joints.
Good Cold Working Performance: TP1 purple copper exhibits high plasticity, making it easy to perform cold bending, flaring, flanging, and other forming operations without cracking. It is particularly suitable for manufacturing complex-shaped pipe components.
Reliable Thermal and Electrical Conductivity: Although the addition of phosphorus slightly reduces the electrical conductivity of pure copper, TP1 still retains high thermal and electrical conductivity, making it suitable for many heat exchange and electrical applications.
Corrosion Resistance: It demonstrates good resistance to atmospheric exposure, freshwater, non-oxidizing acids, and similar media, ensuring a long service life.
Production Process of TP1 Purple Copper Tubes
Raw Material Preparation and Smelting:
High-purity cathode copper plates are used as the primary raw material. Phosphorus-copper master alloy is added in precisely measured amounts as a deoxidizing agent according to the TP1 composition. These materials are melted in large smelting furnaces to form a homogeneous copper melt.
Casting:
The molten copper is poured into vertical or horizontal continuous casting machines, where it solidifies into round copper billets (commonly called ingots) of specified dimensions.
Extrusion or Piercing:
For small to medium-diameter copper tubes, extrusion is commonly used, where heated billets are forced through a die under high pressure to form tubes. For larger diameters, piercing may be employed to produce rough tubes. This step is critical in determining the initial shape and dimensions of the tubes.
Drawing:
The rough tubes obtained from extrusion or piercing lack sufficient dimensional accuracy and surface finish. They undergo multiple passes of cold drawing, where each pass reduces the outer diameter and wall thickness while increasing length. This process significantly improves dimensional precision, surface quality, and mechanical properties. Intermediate annealing is required during drawing to eliminate work hardening and restore ductility.
Finishing and Heat Treatment:
After drawing to the final dimensions, the tubes undergo bright annealing in a protective atmosphere (e.g., nitrogen). This process relieves internal stresses, homogenizes the material structure, and produces a bright, clean surface free from oxidation.
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Main Application Areas of TP1 Purple Copper Tubes
Refrigeration and Air Conditioning Industry: This is the largest application market for TP1 copper tubes. They are widely used in condensers, evaporators, and connecting pipelines in refrigerators and air conditioners. Their high thermal conductivity enables efficient heat exchange, ease of bending and welding simplifies installation, and corrosion resistance ensures long-term sealing and system stability.
Heating and Water Supply Systems: In modern construction, TP1 copper tubes are commonly used for hot water pipelines, underfloor heating systems, and water supply pipes in high-end buildings. Their heat resistance, pressure tolerance, antimicrobial properties (copper ions have a certain inhibitory effect on bacteria), and long lifespan make them a reliable choice. Note: Copper pipes for water systems require specific water quality conditions and should avoid prolonged contact with highly acidic or alkaline water.
Industrial Heat Exchange Equipment: Various heat exchangers in industries such as power plants, chemical plants, and ships (e.g., oil coolers, steam generators) often use TP1 copper tubes as heat transfer elements.
Other Industrial Uses: TP1 copper tubes are also found in gas pipelines (e.g., oxygen or gas pipes, requiring strict adherence to safety standards), hydraulic systems, electrical conductive components, and decorative engineering applications.
Considerations for Selecting and Using TP1 Purple Copper Tubes
To ensure optimal performance and safety when using TP1 purple copper tubes, the following points should be noted:
Correct Selection: Choose the appropriate specifications (outer diameter, wall thickness) and condition of the copper tubes based on the actual application scenario (e.g., working pressure, medium temperature, fluid type). For instance, copper tubes for refrigeration systems require extremely high cleanliness and dryness.
Storage and Handling: Copper tubes should be stored in a dry, clean warehouse and kept away from contact with corrosive substances such as acids, alkalis, and salts. During handling, care should be taken to avoid impacts, deformation, and surface scratches.
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Our factory
We are a specialized manufacturer of premium copper products, including rods, tubes, plates, bars, wires, and strips. Our factory strictly adheres to international standards such as ASTM, EN, JIS, and GB, ensuring material compliance for global markets. Equipped with modern production lines-including continuous casting for rods, cold drawing machines for tubes, and precision rolling mills for strips-we maintain tight control over dimensions and tolerances. Every batch undergoes rigorous in-house testing using spectrometers for chemical composition, tensile testers for mechanical properties, and eddy current testers for defect detection. Our dedicated quality lab guarantees traceable, reliable products for electrical, automotive, and engineering applications worldwide.
Copper product packaging
Our copper product packaging always prioritizes safety protection and professional identification. Copper rods and profiles are securely bundled with steel straps and fixed on reinforced wooden pallets, with waterproof and moisture-proof film wrapped around the exterior. Copper tubes are equipped with protective caps on both ends and packaged in custom-designed cartons or wooden crates with internal cushioning materials. Copper plates and strips are interleaved with anti-rust paper and fully encapsulated in steel-edged crates. All packages are affixed with clear product labels, specifications, and moisture-proof tags. For high-purity copper materials or those with special application requirements (such as oxygen-free copper wires and high-end copper strips), we also offer professional nitrogen-filled sealed packaging to ensure complete oxygen isolation during transportation and storage, preventing oxidation and maintaining the optimal performance and surface condition of the materials.
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