Large diameter quartz glass tubes and ultra-thin quartz capillaries are among the hardest specifications to source reliably. Most manufacturers only produce standard sizes from 10mm to 200mm in diameter. Buyers often have to work with multiple suppliers for different sizes, which leads to inconsistent quality, longer lead times and higher logistics costs.
For oversized tubes above 300mm, common problems include uneven wall thickness, poor roundness, internal bubbles and thermal deformation at high temperatures. For tiny capillaries below 2mm, buyers frequently face issues like poor concentricity, inner bore clogging and high breakage rates during secondary processing.
As a professional high-purity quartz manufacturer based in Donghai, China’s quartz industry hub, JiuRui Quartz operates dedicated forming and drawing production lines to cover the full diameter range from 0.5mm to 900mm. From micron-level capillary tubing to meter-scale industrial quartz pipes, we deliver stable quality and precision with full in-house secondary processing — cutting, grinding, coating, annealing and sealing — so you can source all quartz tubes from one supplier. Explore our 4N8 high purity quartz tubes
Common Challenges With Extreme-Size Quartz Tubes
1. Large Diameter Quartz Tubes: Stability & Defect Issues
Forming difficulty rises exponentially above 300mm diameter. Most suppliers struggle with:
- Uneven wall thickness: Deviation can reach 2mm or more, causing uneven stress and cracking under high temperature
- Poor roundness: Oval tube ends lead to poor sealing and gas/liquid leakage in assembly
- Bubbles & inclusions: Insufficient degassing during forming reduces transmittance and thermal performance
- Limited length: Most large tubes are only available in lengths under 1 meter, unsuitable for long-process equipment
2. Ultra-Fine Quartz Capillaries: Precision & Processing Difficulties
For capillaries with inner diameter under 2mm, precision control is extremely demanding. Common market defects include:
- Low concentricity: Misaligned inner and outer diameters cause assembly failure in precision instruments
- Clogged bores: Residual impurities block the inner channel, rendering the tube useless
- High breakage rate: Cutting and grinding tiny tubes easily causes chipping and cracking, lowering yield and raising costs
View ASTM standard for fused quartz glass components
Why Choose JiuRui’s Full-Size Quartz Glass Tubes
We operate separate dedicated production lines for micro-capillary, standard and large-diameter tubes, each with matched process controls and inspection standards to solve the quality pain points of extreme sizes.
1. 900mm Large Diameter Quartz Glass Tube: Uniform Wall & Thermal Stability
We use a dedicated gas-fused forming process with CNC wall thickness control to stably produce large diameter quartz glass tubes from 300mm to 900mm:
- Controlled wall thickness: Wall thickness deviation ≤ ±0.5mm per tube, far better than the industry average of ±2mm, for uniform stress and 3x better thermal shock resistance
- High roundness accuracy: End roundness tolerance ≤ 0.8mm, with flat end faces for precision flange and seal assembly, no leakage
- High purity & low defects: Made from 4N grade high-purity raw material with clean-room forming, far fewer bubbles and inclusions than industry standards
- Long length available: Single tubes up to 2000mm at 900mm diameter, and up to 4000mm for medium-large sizes, for one-piece installation in long-process equipment
2. 0.5mm Ultra-Fine Quartz Capillary: High Concentricity & Clog-Free
Our high-precision micro-drawing line with precise speed and temperature control stably produces ultra-fine quartz tubes from 0.5mm to 10mm:
- High concentricity: Inner-outer diameter concentricity deviation ≤ 0.02mm, uniform wall thickness for precision instruments and chromatography
- Smooth & clog-free bore: Inner wall roughness Ra ≤ 0.4μm, no impurity blockage, stable and uniform fluid flow
- Flexible wall thickness: Wall thickness as thin as 0.1mm, with thick-wall pressure-resistant options available for different working pressures
- Secondary processing support: End face grinding, chamfering, sealing and tip-forming available with much higher yield than the industry average
3. Full-Range One-Stop Supply, No Multiple Suppliers
JiuRui Quartz covers the full diameter range from 0.5mm to 900mm, all with unified quality control and delivery:
- Material options: Standard quartz, 4N8 high-purity quartz, low-OH quartz, UV-grade quartz
- Wall thickness options: Thin-wall, standard, thick-wall pressure-resistant, custom made to order
- Value-added processing: Cutting, precision grinding, polishing, coating, annealing, sealing, flange welding — all in-house
See our precision grinding service | See our explosion-proof & UV coating service
Applications by Diameter Range
Large Diameter (300mm – 900mm)
- Solar PV: Monocrystalline furnace liners, flow guiding tubes for ingot casting
- Chemical & environmental protection: Large reactor tubes, waste gas treatment equipment
- Semiconductor: Diffusion and oxidation furnace tubes for large wafer manufacturing
- R&D laboratories: Space simulation chambers, high-temperature sintering equipment
Standard Diameter (10mm – 300mm)
- Chemical corrosion resistance: Strong acid/alkali fluid transfer, heat exchangers
- Laboratory: Reaction tubes, condenser tubes, sample tubes
- Water treatment: UV sterilizer quartz sleeves
- Industrial heating: Tube furnace and diffusion furnace liners
Ultra-Fine Capillary (0.5mm – 10mm)
- Precision analysis: GC, HPLC and mass spectrometry instrument capillaries
- Medical devices: Minimally invasive instruments, biochemical analysis equipment
- Optical communication: Fiber coupling, laser device capillaries
- Precision industry: Dispensing, jetting and precision fluid control
View our industry application cases
Quality Assurance & Service
Full-Process Inspection & Traceable Data
Each batch goes through dimensional tolerance, wall thickness deviation, roundness, appearance defect and purity checks. Large tubes are 100% wall-thickness scanned; capillaries are 100% bore tested. Official test reports are available on request. Zero defective products leave the factory.
Customization & Free Sampling
We accept custom orders based on drawings or samples. Special diameters, wall thicknesses and materials can all be developed. Free sample testing is available before bulk orders to confirm performance and dimensions.
Stable Lead Time & Expedited Service
Standard sizes ship within 7 days. Custom large-diameter and capillary tubes deliver in 10–15 days. Expedited production channels are available for urgent orders to minimize your downtime.
Safe Packaging & Breakage Replacement
Large tubes are packed in custom wooden crates with EPE cushioning. Capillaries use protective sleeve packaging. Any breakage during transit is replaced free of charge upon photo confirmation.
Contact Us for Custom Quartz Tubes
If you need large diameter quartz glass tubes, ultra-fine quartz capillaries or special-size custom quartz tubing, work with JiuRui Quartz. Full 0.5mm–900mm diameter coverage, high-purity raw material, stable precision, one-stop secondary processing, direct factory pricing.
Company: Donghai JiuRui Quartz Products Co., Ltd.
Brand: JiuRui Quartz
WhatsApp (Direct Chat): +86 15189047520
Products: Large diameter quartz glass tubes, quartz capillaries, custom size quartz tubing, precision quartz processing