TORICH specializes in manufacturing high-precision stainless steel capillary tubes designed specifically for the medical device industry. Our capillary tubes are widely used in hypodermic needles, catheters, medical gas delivery systems, microfluidic devices, diagnostic equipment, and surgical instruments. Through advanced multi-stage cold-working technology and rigorous quality control, TORICH ensures its tubing possesses the following characteristics: exceptional dimensional accuracy, extremely high internal and external cleanliness, and excellent corrosion resistance, thereby meeting the performance, consistency, and reliability requirements of leading global medical device manufacturers.
Customer Challenge
- Ultra-high precision and consistent dimensional accuracy.
- Sterility, surface cleanliness, and biocompatibility compliance.
- Excellent resistance to bending, pressure, and chemical corrosion.
Solution
Precision Manufacturing
TORICH employs a high-precision cold-drawing process and multi-level dimensional control to ensure extremely high precision in every medical-grade capillary tube it produces. Automated laser and optical measurement systems continuously monitor the outer diameter, inner diameter, and wall thickness to ensure consistency across batches. Advanced cutting processes and precision deburring technology create burr-free, smooth tube ends, enhancing patient safety and ensuring reliable operation in high-precision medical devices.
Surface Treatments
TORICH capillaries undergo pickling and passivation to enhance corrosion resistance, stabilize the surface oxide layer, and improve overall biocompatibility. Precision mechanical or electrochemical polishing creates a smooth, mirror-like, non-porous surface, minimizing the risk of contamination and effectively preventing bacterial adhesion. For medical devices requiring rigorous sterilization cycles or specific chemical environments, TORICH offers a range of functional surface coatings, including PTFE, biocompatible polymer films, silicone coatings, and hydrophobic layers. These coatings further enhance durability, reduce friction, and ensure the tubing meets the stringent ISO, ASTM, and FDA requirements for medical-grade surface cleanliness.
Heat treatment
TORICH stainless steel capillaries undergo rigorously controlled heat treatment and bright annealing processes to achieve optimal ductility, microstructural stability, and consistent mechanical properties. This ensures that the capillaries will not crack during bending, forming, stretching, and coiling, while maintaining excellent dimensional integrity. Enhanced toughness and elasticity allow the capillaries to withstand repeated high-temperature sterilization cycles, such as autoclaving, ethylene oxide sterilization, and chemical disinfection, without deformation, embrittlement, or performance degradation.
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