11G 3MM , Medical Stainless Steel 304 Capillary Tube For Needle Tube Manufacturing , ISO9626

Definition:

A Medical Grade Stainless Steel 304 Capillary Tube is a thin-walled, hollow cylindrical structure made from austenitic stainless steel grade 304. Designed for medical applications, these capillary tubes are precision-engineered to meet stringent biocompatibility, dimensional accuracy, and corrosion resistance standards. They serve as raw material for manufacturing hypodermic needles, biopsy tools, catheters, and other minimally invasive surgical instruments. Stainless Steel 304 (AISI304 / SUS304) is a chromium-nickel alloy (18% Cr, 8% Ni) known for its excellent corrosion resistance, formability, and cost-effectiveness. While SS316L is often preferred for implantable devices, SS304 is widely used in disposable and reusable medical tools where extreme corrosion resistance is not critical. Its non-magnetic properties, ease of sterilization, and compliance with medical standards make it ideal for needle tube production. For medical usage, these stainless steel 304 or 316L capillary tubes are all manufacftured according with ISO9626: 2016 international standard.

Manufacturing Process:

• Cold Drawing: Reduces tube diameter while enhancing mechanical properties.
• Annealing: Heat treatment to relieve stress and restore corrosion resistance.
• Cleaning & Passivation: Acid baths remove contaminants and strengthen the passive oxide layer.
• Polishing: Electropolishing or mechanical polishing for surface refinement.
• Quality Testing: Eddy current testing, tensile tests, and surface roughness checks.

Features & Properties:

• Corrosion Resistance: Resists bodily fluids, disinfectants, and sterilization processes.
• High Precision: Tight tolerances ensure consistent inner/outer diameters (ID/OD/Length).
• Smooth Surface Finish: Minimizes tissue trauma and friction.
• Sterilizability: Compatible with autoclaving, gamma irradiation, and ethylene oxide.
• Durability: Maintains structural integrity under mechanical stress.

Applications:

• Hypodermic Needles: For drug delivery and blood collection.
• Biopsy Needles: Precision cutting for tissue sampling.
• Catheters: Urinary, vascular, and drainage systems.
• Surgical Instruments: Endoscopic tools, guidewires, and trocars.
• Dental Equipment: Irrigation needles and anesthetic delivery.

Packaging & Storage:

• Cleanroom Packaging: Double-sealed in vacuum bags to prevent contamination.
• Storage: Dry, temperature-controlled environments to avoid oxidation.