Custom Quartz Tubes, Capillary Tubes and Precision Fused Quartz Tubular Components

Fuyao Quartz manufactures high-purity fused quartz tubes and quartz capillary tubes for semiconductor equipment, laboratory instruments, analytical systems, optical devices, high-temperature processing and customized industrial assemblies. Our product range includes standard transparent quartz tubing, small-bore quartz capillaries, thin-wall tubes, thick-wall tubes, one-end-closed quartz tubes, precision-cut short tubes and specially machined tubular quartz components.

The products shown include both conventional quartz tubes with relatively large inner diameters and precision capillary tubes with small internal bores. Different tube sizes, wall thicknesses, lengths and end structures can be manufactured according to customer drawings or application requirements.

Compared with ordinary borosilicate glass tubing, fused quartz tubing provides higher temperature resistance, lower thermal expansion, better ultraviolet transmission and excellent chemical stability. These characteristics make quartz tubes suitable for applications where standard glass cannot provide sufficient temperature resistance, purity or dimensional stability.

Fuyao Quartz supports prototype orders, small-volume customized production and repeat batch manufacturing for international industrial customers.

Product Range

Our quartz tube manufacturing capabilities cover a wide range of standard and customized tubular products.

Standard Clear Quartz Tubes

Standard fused quartz tubes are available in different outside diameters, inside diameters, wall thicknesses and lengths. They can be supplied as full-length tubing or cut into finished sections.

These tubes are commonly used for:

• Laboratory equipment
• Heating systems
• UV lamps
• Semiconductor processing equipment
• Gas delivery systems
• Chemical handling
• Optical assemblies
• High-temperature observation systems

Both thin-wall and thick-wall structures can be manufactured depending on the required mechanical strength, thermal response and internal flow capacity.

Quartz Capillary Tubes

Quartz capillary tubes have a relatively small inner diameter and require more precise control of the internal bore, outside diameter, wall thickness and concentricity.

They are suitable for:

• Microfluidic systems
• Capillary electrophoresis
• Chromatography equipment
• Precision sampling
• Gas and liquid delivery
• Optical fiber protection
• Analytical instruments
• Medical testing equipment
• Scientific research devices

The inner bore can be customized for different flow rates, sampling volumes and assembly requirements.

One-End-Closed Quartz Tubes

One-end-closed quartz tubes are produced by flame sealing or hot forming one end of the tube. The closed end may be rounded, hemispherical or customized according to the drawing.

These products are often used as:

• Quartz test tubes
• Sample containers
• Sensor protection tubes
• Heating chambers
• Thermocouple protection sleeves
• Small reaction vessels
• Laboratory consumables
• Chemical analysis containers

The closed end is carefully formed to reduce excessive deformation, sharp transitions and localized stress.

Precision-Cut Quartz Tube Sections

Quartz tubes can be cut into short sections with controlled overall length. The cut ends may be supplied as flame-polished, mechanically ground or precision-polished surfaces.

Short quartz tube sections are widely used as:

• Insulating sleeves
• Spacers
• Protective housings
• Optical alignment components
• Semiconductor equipment parts
• Instrument assembly components
• Gas distribution components
• High-temperature supports

Length tolerance and end-face quality can be specified according to the customer’s assembly requirements.

Machined Quartz Tubular Components

In addition to standard straight tubing, Fuyao Quartz can provide quartz tubular parts with customized end structures and secondary machining.

Available processing options include:

• Precision cutting
• End-face grinding
• End-face polishing
• Flame polishing
• One-end sealing
• Local diameter reduction
• Enlarged end sections
• Stepped structures
• Drilled or precision-bored structures
• Grooves
• Slots
• Side holes
• Matching quartz sleeves
• Special internal and external profiles

Because quartz is a brittle material, every design must consider minimum wall thickness, edge geometry, stress concentration and manufacturing feasibility. Customers are encouraged to provide drawings for technical evaluation before production.

Material Properties

Our clear quartz tubes are manufactured from high-purity fused quartz with excellent thermal, chemical and optical performance.

Typical material characteristics include:

Actual operating temperature depends on tube dimensions, wall thickness, loading conditions, heating rate, atmosphere and duration of use.

Quartz should not be exposed to hydrofluoric acid, and care should also be taken with hot concentrated phosphoric acid and alkaline materials at elevated temperatures.

Customizable Specifications

Fuyao Quartz does not limit customers to fixed catalogue sizes. Quartz tubing can be manufactured according to the required equipment interface or assembly design.

Customers may specify:

• Outside diameter
• Inside diameter
• Wall thickness
• Overall length
• Bore diameter
• Length tolerance
• OD and ID tolerance
• Wall-thickness uniformity
• Straightness
• Concentricity
• End-face flatness
• End-face finish
• Open or closed ends
• Rounded or flat closed end
• Flame-polished or ground ends
• Thin-wall or thick-wall structure
• Special machined features
• Cleaning requirements
• Packaging method
• Required quantity

For capillary tubes, the internal bore is one of the most important specifications. Customers should clearly state whether the bore is used for gas transport, liquid sampling, optical fiber insertion, sensor installation or another functional purpose.

Surface and End-Finish Options

Different applications require different tube-end treatments.

As-Cut Ends

Suitable for general applications where the tube will be installed inside another assembly and the end face is not a sealing or optical surface.

Flame-Polished Ends

Flame polishing removes sharp cutting edges and produces a smoother rounded transition. This treatment is often selected for laboratory tubes, handling components and parts where sharp edges must be avoided.

Ground Ends

Ground end faces provide better dimensional and length control than basic flame polishing. They are suitable for mechanical assemblies and positioning structures.

Precision-Polished Ends

Precision-polished end faces are available for applications involving optical transmission, precision sealing or strict assembly requirements.

The appropriate end finish should be selected according to sealing method, contact condition, dimensional tolerance and final application.

Typical Applications

High-purity quartz tubes and capillary tubes are used in a wide range of industries.

Semiconductor and Photovoltaic Equipment

• Gas inlet and outlet tubes
• Furnace accessories
• Process observation tubes
• Sensor sleeves
• Quartz spacers
• Insulating components
• Cleaning and deposition equipment
• Wafer-processing assemblies

Laboratory and Analytical Instruments

• Quartz test tubes
• Sample tubes
• Reaction tubes
• Capillary sampling tubes
• Chromatography components
• Spectroscopy equipment
• Chemical analysis instruments
• High-temperature experimental systems

Optical and UV Equipment

• UV lamp tubes
• Optical protection sleeves
• Laser-system components
• Optical fiber sleeves
• Spectrometer components
• UV sterilization equipment
• Light-transmission assemblies

Industrial High-Temperature Applications

• Heating element protection
• Thermocouple sleeves
• High-temperature gas tubes
• Furnace observation windows
• Temperature sensor housings
• Chemical processing equipment

Microfluidic and Precision Fluid Systems

• Micro-flow transport
• Small-volume sampling
• Controlled gas delivery
• Liquid dosing
• Medical analysis systems
• Research instruments

Quality Inspection

Quartz tubes used in industrial assemblies must be inspected for both dimensional accuracy and visual quality. Fuyao Quartz can perform inspection according to customer drawings and agreed standards.

Inspection items may include:

• Outside diameter measurement
• Inside diameter measurement
• Wall-thickness measurement
• Overall length measurement
• Bore-size inspection
• Concentricity inspection
• Straightness inspection
• End-face inspection
• Surface scratch inspection
• Bubble and inclusion inspection
• Crack and edge-chip inspection
• Closed-end appearance inspection
• Assembly-fit verification
• Packaging inspection

For precision capillary products, measurement methods should be confirmed before production because extremely small internal diameters may require specialized gauges, optical inspection or microscope measurement.

Packaging and Handling

Quartz tubes are transparent but brittle, especially when the tube has a thin wall, small diameter or long aspect ratio. Suitable packaging is therefore important for international transportation.

Depending on the product size and quantity, packaging may include:

• Individual protective sleeves
• Soft foam separation
• Plastic tube protection
• Custom inner trays
• Bubble cushioning
• Reinforced cartons
• Wooden cases for large or fragile orders
• Separate protection for precision-polished ends

The products are cleaned and separated before packaging to reduce surface contact, scratches and transportation damage.

Information Required for Quotation

To receive an accurate quotation, please provide the following information:

1. Outside diameter
2. Inside diameter
3. Wall thickness
4. Required length
5. Quantity
6. Open-end or one-end-closed structure
7. End treatment
8. Dimensional tolerances
9. Working temperature
10. Application or equipment type
11. Cleaning and packaging requirements
12. Technical drawing or sample, if available

For a customized tubular component, a two-dimensional drawing showing all dimensions, tolerances and end structures is strongly recommended.

Why Choose Fuyao Quartz

Fuyao Quartz provides more than standard quartz tubing. We support customers from material selection and drawing review through prototype production, dimensional inspection and batch supply.

Our advantages include:

• High-purity fused quartz material
• Standard and customized tube sizes
• Conventional tubes and precision capillary tubes
• Thin-wall and thick-wall manufacturing
• One-end sealing and flame forming
• Precision cutting and end processing
• Small-batch prototype support
• Repeat production for industrial projects
• Drawing-based OEM manufacturing
• Dimensional inspection before shipment
• Protective export packaging
• Professional technical communication

Whether your project requires a standard transparent quartz tube, a micro-bore capillary tube, a one-end-closed sample tube or a precision-machined tubular component, Fuyao Quartz can manufacture the product according to your technical requirements.

Frequently Asked Questions

1. What information is required to customize fused quartz tubes or capillary tubes?

Please provide the outside diameter, inside diameter, wall thickness, overall length, required quantity and dimensional tolerances. You should also specify whether the tube requires two open ends, one sealed end, flame-polished ends, ground ends or precision-polished ends. For special quartz tubular components, a technical drawing showing the end structure, bore size, holes, grooves or stepped sections is recommended. Information about the working temperature, application, cleaning standard and packaging requirements will also help us evaluate manufacturing feasibility and prepare an accurate quotation.

2. What is the difference between a standard quartz tube and a quartz capillary tube?

A standard quartz tube normally has a relatively larger inner diameter and is commonly used for laboratory equipment, heating systems, semiconductor processing, gas delivery and optical assemblies. A quartz capillary tube has a much smaller internal bore and usually requires tighter control of the inner diameter, outer diameter, concentricity and wall-thickness uniformity. Capillary tubes are often used for microfluidics, precision sampling, chromatography, analytical instruments, optical fiber protection and controlled gas or liquid delivery. Fuyao Quartz can manufacture both standard tubes and small-bore capillary tubes according to customer specifications.

3. Can you supply one-end-closed tubes and specially processed quartz tubular parts?

Yes. Fuyao Quartz can provide one-end-closed quartz tubes, quartz test tubes, short tube sections, sleeves and custom tubular components. Available processing includes precision cutting, flame polishing, end sealing, end-face grinding, precision polishing, local diameter reduction, stepped structures, side holes, grooves and customized end profiles. Because fused quartz is brittle, the feasibility of very thin walls, sharp corners or complex structures must be reviewed before production. Customers are encouraged to send drawings or samples for engineering evaluation.