close
Choose Your Site
Global
Social Media
| Quantity: | |
|---|---|
Stainless steel capillary tubing is a precision-engineered product with extremely narrow inner diameters (0.5–6.35 mm) and wall thicknesses (0.1–1.0 mm), designed for applications requiring precise fluid/gas conveyance and miniaturized systems. Manufactured from grades like 304, 316L, and 310S via cold-drawing or micro-extrusion, it offers exceptional dimensional accuracy (±0.01 mm tolerance) and surface finish (Ra ≤ 0.8 μm). Compliant with standards like ASTM A269, ASME SA269, and ISO 1127, capillary tubing balances mechanical strength with geometric precision.
The seamless construction eliminates weld defects, ensuring leak-free performance even under high pressure (up to 20,000 PSI) or vacuum conditions. Its corrosion-resistant austenitic microstructure makes it suitable for both aggressive media and high-purity environments.
Precision Dimensional Control: Offers tight OD/ID tolerances for use in microfluidic devices, analytical instruments, and medical catheters.
High Pressure & Vacuum Resistance: Maintains structural integrity under extreme pressures (e.g., HPLC systems) and low-pressure vacuum applications (e.g., mass spectrometers).
Superior Corrosion Resistance: Available in grades like 316L (for seawater/chlorides) and 310S (for high-temperature oxidation), ensuring compatibility with diverse media.
Surface Finish Options: Polished (Ra ≤ 0.2 μm) for biocompatibility in medical use or passivated for enhanced corrosion resistance in chemical analysis.
Medical Devices: Used in insulin pumps, angiographic catheters, and minimally invasive surgical tools, meeting ISO 10993 biocompatibility standards.
Analytical Instruments: Ideal for gas chromatography (GC) columns, liquid chromatography (HPLC) capillaries, and sensor tubing requiring low dead volume and chemical inertness.
Aerospace & Defense: Employed in aircraft fuel systems, hydraulic lines, and missile guidance components for lightweight, high-strength fluid control.
Industrial Automation: Used in precision lubrication systems, pressure transducers, and robotic arm hydraulics requiring compact, reliable tubing.
Q: What materials are commonly used for capillary tubing?
A:304 (general purpose), 316L (chloride resistance), 310S (high-temperature), and specialty alloys like Inconel 625 for extreme environments.
Q: Can capillary tubing be bent without kinking?
A:Yes, when cold-worked properly; mandrel bending or heat treatment can improve formability, though wall thickness <0.3 mm requires extra care.
Q: How is leakage tested for such small diameters?
A:Helium mass spectrometry or pressure decay testing is standard, ensuring leak rates <1×10⁻⁹ mbar·L/s for critical applications.
Q: What connection methods are used for capillary tubing?
A:Compression fittings (e.g., Swagelok), flare fittings, or laser welding; adhesive bonding for non-pressure applications.
