Copper sleeve, with an inner diameter of 12 millimeters (± 0.5), an outer diameter of 28.9 millimeters (± 0.02), and a length of 1 meter. The grade of copper is CW510L. Introduce its material and purpose
1. Product Specification Summary
Form: Straight, round tube
Inner Diameter (ID): 12 mm (±0.5 mm) – Relatively loose tolerance, typically sufficient for fluid or gas passage.
Outer Diameter (OD): 28.9 mm (±0.02 mm) – Very tight tolerance, indicating the OD is a critical dimension for assembly or connection.
Wall Thickness: Calculated as approx. (28.9 – 12) / 2 = 8.45 mm. This classifies it as a heavy-wall tube.
Length: 1 meter
Material Grade: CW510L (Phosphorus-deoxidized copper, equivalent to Chinese grade TP2 and U.S. grade C12200).
2. Core Material: CW510L (TP2) Explained
This material defines the tube’s performance and applications.
Identity: High-purity phosphorus-deoxidized copper (Cu ≥ 99.9%, with 0.013-0.05% P).
Key Properties:
Excellent Weldability & Brazeability: Phosphorus acts as a deoxidizer, preventing brittle oxide formation during heating, resulting in strong, leak-proof joints. This is why it’s known as “welding copper.”
Superior Thermal Conductivity: An ideal material for heat transfer components.
Good Corrosion Resistance: Especially immune to “hydrogen embrittlement,” making it stable in hydrogen-containing or reducing atmospheres.
Good Ductility & Workability: Easily bent, flared, or forged.
Moderate Electrical Conductivity: Typically ≥85% IACS (International Annealed Copper Standard).
Lead-Free: Complies with strict sanitary standards for potable water, food, and medical applications.
3. Application Analysis: Combining Specifications & Material
This heavy-wall, high-OD-precision, weldable copper tube points to industrial applications requiring pressure handling, heat transfer, and reliable connections.
Most Likely Primary Applications:
Industrial Refrigeration & HVAC Systems
Use: As a critical connection line or process tube in large chillers, heat pumps, or industrial cooling equipment. The heavy wall withstands high system pressures (e.g., from R410A or other high-pressure refrigerants). The precise OD ensures a sealed fit with flanges or valves. CW510L’s superior brazeability facilitates on-site installation.
Hydraulic & Pneumatic Systems
Use: For medium-to-high pressure hydraulic fluid lines or high-purity pneumatic tubing. The thick wall provides structural strength and pressure rating. The lead-free CW510L material prevents fluid contamination, and its corrosion resistance ensures long-term system integrity.
Heat Exchanger Manufacturing
Use: As the heat transfer tube in shell-and-tube heat exchangers. Its excellent thermal conductivity is key for transferring heat between fluids inside and outside the tube. The thick wall offers longer service life and adequate pressure capability.
Special Fluid Conveyance
Use: For conveying seawater, hot water, steam, or certain corrosive chemicals. The corrosion resistance and strength of CW510L make it suitable for such demanding environments.
High-Precision Instrumentation & Equipment
Use: In analytical instruments, medical devices, or semiconductor manufacturing equipment for transporting coolant, inert gases, or as part of vacuum chambers. The strict OD tolerance ensures consistency in precision assemblies.
4. Why It’s NOT for Other Common Uses:
Not for standard plumbing: The wall is excessively thick, making it cost-ineffective.
Not for electrical conduit: The material grade and precision are over-specified.
Not for decorative use: The performance characteristics are not required.
Conclusion
The tube you described—Φ12 (ID) x Φ28.9 (OD) x 1000mm in CW510L (TP2)—is an industrial-grade, heavy-wall, high-OD-precision, weldable fluid conveyance and heat transfer component.
Its design focuses on:
Leveraging CW510L’s reliable weldability for sealed system connections.
Utilizing its thermal conductivity and corrosion resistance for efficient heat exchange or fluid transport.
Employing its thick wall and precise OD to meet pressure and precision assembly requirements.
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