Copper Tube 99% 99.9% Pure Copper Pipe 15mm 20mm 25mm Copper Tube 3/8 Straight And Pancake Tube Pipes
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Phosphorus-Free Oxygen-Free Copper Straight Tube (TU1/TU2) – Technical Supplement
Manufactured from high-purity oxygen-free copper cathode (Cu ≥ 99.97%, oxygen ≤ 10 ppm), the tubes are produced by continuous up-cast process followed by planetary rolling, multi-pass cold drawing with intermediate annealing, and final precision drawing. No phosphorus-containing deoxidizer is used throughout the process, ensuring fine and uniform grain structure with consistently high electrical and thermal conductivity.
Key Process Advantages
● Upward continuous casting under inert gas protection with graphite die, eliminating gas porosity and oxide inclusions
● Total reduction ratio ≥ 95% through planetary rolling and multi-pass drawing, achieving concentricity ≤ 0.03 mm and wall thickness tolerance ≤ ±0.03 mm
● 100% eddy current testing on every coil (compliant with EN 1971 Class A)
● Pressure testing (hydrostatic or pneumatic) up to 60 bar with zero leakage
● On-line direct-reading spectrometer for chemical composition + full laboratory mechanical and metallurgical testing
Quality Control System
● Production strictly in accordance with IATF 16949 and ISO 9001
● Full batch traceability from raw material to finished product (records retained for 10 years)
● Critical dimensions monitored 100% on-line by German Precitec laser micrometer
● Each coil delivered with EN 10204 3.1 material certificate, eddy current test report, pressure test report, and third-party inspection report (when required)
Suitable for high-pressure refrigeration and air-conditioning systems (R410A/R32), heat pumps, thermal management of new energy vehicles, industrial heat transfer tubing, seawater desalination, and other applications demanding superior cleanliness, pressure resistance, and long-term reliability.
We focus on supplying consistently high-quality, fully documented copper tubes to leading industrial customers. No exaggerated claims—factory audits and production trials are welcome.
