High-Quality Quartz Capillary Tubing Manufacturer & Factory

We manufacture quartz capillary tubes with inner diameters (ID) ranging from 2 µm to 6.0 mm and outer diameters (OD) from 50 µm to 12.0 mm. Standard redrawing tolerance is ±0.005 mm, with premium custom runs held to ±0.001 mm. Custom cross-sections include circular, square, rectangular, D-shape, and eccentric multi-lumen geometries.

JGS1 is a high-purity synthetic fused silica offering over 90% transmission in the deep UV (185 nm to 2500 nm) with high OH content (~1,000 ppm), making it free from bubble inclusions and ideal for UV absorbance detectors. JGS2 provides high optical transmission across the visible spectrum (220 nm to 2600 nm). JGS3 is low-OH electrically fused quartz (<5 ppm OH) that eliminates the deep 2.73 µm water absorption band, making it the preferred substrate for infrared and FTIR spectroscopy up to 3500 nm.

To prevent atmospheric moisture abrasion and surface micro-cracking, we apply high-temperature polyimide coatings (continuous service from -65°C to +350°C, intermittent up to 400°C), UV-curable fluoropolymer/acrylate coatings, or aluminum metal jackets for extreme vacuum environments. For detection windows, we provide automated thermal or chemical polyimide window-burning to clear clean optical apertures without tube fracture.

Standard mechanical scoring can cause microscopic chips and crack propagation along the bore. We utilize diamond-wheel precision wet sawing, ultra-short pulse picosecond laser ablation cutting, and flame-cleaving methods. End faces can be flat polished to optical pitch finishes (80/50 or 40/20 scratch-dig) or flame-polished to eliminate burrs and sharp edges that could damage seals or disrupt fluid columns.

Every production batch includes an ISO 9001:2015 Certificate of Conformance (CoC), material traceability sheets, high-resolution laser micrometer dimension logs, and optical transmittance curves (UV-Vis-NIR spectrophotometer verification). For semiconductor orders, we provide DIN 58927 bubble class verification and Class 1,000 cleanroom packaging verification.

Standard catalog sizes and existing draw runs typically ship in 3 to 5 business days. Custom dimension prototypes and specific redrawing runs take 2 to 3 weeks including mandrel setup and verification. Mass-production batches for recurring OEM contracts are supported via safety stock programs in our warehouse with 48-hour release windows.