Titanium Capillary Tubes

As thin-walled precision tubes made from titanium and titanium alloys, titanium capillary tubes are the vital core element in the high technology manufacturing equipment in which the intrinsic corrosion resistance, biocompatibility, and light weight of titanium material is played to the full. These precision tubes are made from pure titanium (Gr1, Gr2) and titanium alloys (Gr5, TA8) and are also called doner tubes and receiver tubes by the forming processes and maintain the light weight benefit of titanium as the density of titanium is just 4.5g/cm³ and the tubes are also highly resistant to corrosion from sea water, strong acids and alkali.

Here are some popular specifications:
OD 0.126" (+/-.002") x ID 0.068" (+/-.002") x L 12.00"
OD 0.126" (+/-.002") x ID 0.068" (+/-.002") x L 72.00"
OD 2.78mm +/-0.03mm x ID: 2.10mm +/-0.03mm x L 1800 to 2000mm
OD 2.10mm +/- 0.03mm x ID 1.60mm +/- 0.03mm x L 1800 to 2000mm

OUR RANGE OF TITANIUM PRECISION TUBES

The ETHEN tolerance standard is AD +/- 0.05 mm and WD +/- 10%.

OVERVIEW TITANIUM

Titanium capillary tube

Titanium capillary tubing

Titanium micro tube

The titanium capillary tubes are best in compliance with international standard such as ASTM B338, ASTM B861 with different base material grades which can be selected according to the requirements of applications. Among them, Gr1 has the best plasticity because of the lower oxygen and iron content, Gr5 is getting stronger with titanium-6 aluminum-4 vanadium alloy ration, and TA8 improving corrosion and heat resistance by addition of aluminum and tin elements.

The dimensional parameters of titanium capillary tubes demonstrate exceptional precision control, covering the full range from ultra-miniature to general industrial grades. Outer diameter can be customized from 0.2mm to 20mm, considering the medical implants and micro-instruments are mainly between 0.2mm~6mm, and for the industrial heat transfer and fluid conveyance is 8mm ~ 20mm. The wall thickness relates to 0.015mm to 2mm, the thin-wall limit is 0.015mm, which is one-fifth the diameter of a human hair and wall thickness tolerances are managed within ±0.005mm. The outer diameter tolerance is controlled at the finest ±0.003mm. On length,Chenxin Titanium standard supplies are 500mm to 6000mm with customized cutting and special shapes like U-shape or spiral can be offered if needed. The product is electrolytically polished to a roughness Ra≤0.4μm and the inner wall is free of scratches, burrs and other defects, which guarantee the smoothness of fluid or gas transportation. The mechanical properties depend on the base material: pure titanium Gr1 capillaries tubes have an elongation of 50%-60% while titanium alloy Gr5 has a tensile strength of 800-1000MPa making it suitable for various mechanical demands from different usages.

In practice, titanium capillary tubes utilize the synergy of "accurate dimension+ the advantages of materials" to successfully extend to the core process of many industries. In medical, owing to the excellent biocompatibility, Gr1 capillary tubes (OD 1.6mm × wall thickness 0.3mm) are applied in implantable drug delivery catheters, endoscopic precision tubing and vascular stents. They meet the ISO 10993-4 standard of biosafety and have a prevention of tissue rejection in human body.

In satellite attitude control system of aerospace, Gr5 capillary tubes (Outer Diameter: 2.0mm × Wall Thickness: 0.5mm) are used as fluid transmission parts, in the production of such fluid parts stainless steel is most suitable material. The shape of these tubes are invariant over the temperature -200°C to 350°C and the weight is about 60% less than equivalent tubes of stainless steel. TA8 titanium alloy capillary tubes (outer diameter 3.0mm × wall thickness 0.15mm) are used in the chemical and analytical instrument industry, especially for chromatograph carrier gas conduits and reactor sampling tubing because they can stand the corrosion of strong acid and alkali, with a corrosion rate less than 0.001mm per year. In deep ocean search gear, they make 6,000M pressure sensor transmission tubing with a service life of surpassed 8 years.

The precision characteristics of titanium capillary tubes stem from stringent manufacturing and quality control processes. Production involves vacuum arc melting to ensure base material purity, followed by multiple cold drawing and intermediate annealing stages to refine grain structure. German-imported precision molds are used to control dimensional accuracy, with R&D and equipment investment for the Gr5 capillary tube production line alone reaching 15 million yuan. The development cycle from R&D to mass production takes three years. Finished products undergo full-size inspection using optical image measuring instruments, scanning electron microscopes, and other equipment to ensure outer diameter and wall thickness tolerances meet order requirements.

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