Fused Quartz Tube — Open Ends

High-purity fused quartz tube designed for laboratory tube furnaces, heat-treatment systems and controlled-atmosphere thermal processing. Open at both ends, it can be integrated with suitable furnace seals, gas connections and vacuum assemblies.

Its low thermal expansion and high-temperature capability make it suitable for annealing, sintering, calcination and materials-processing applications. The standard range covers selected laboratory dimensions from 25 to 130 mm OD, with additional diameters, wall thicknesses and lengths available for specific furnace configurations.

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Dimensions (OD × ID × Length, mm) — Fused Quartz

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Designed for laboratory tube furnaces and controlled-atmosphere thermal processing, this high-purity fused quartz tube is open at both ends for easy integration with furnace seals, gas lines and vacuum assemblies. The transparent quartz construction combines low thermal expansion with good dimensional stability at elevated temperature, while allowing direct visual inspection of the process zone during setup and operation.

Key Features

✓ High-purity fused quartz construction

✓ Open at both ends

✓ Transparent process tube

✓ Low thermal expansion

✓ Standard OD from 25 to 130 mm

✓ Additional dimensions available on request

Typical Applications

• Laboratory tube furnaces

• Controlled-atmosphere heat treatment

• Annealing and thermal processing

• Sintering and calcination

• Battery and advanced-material research

• Powder and ceramic processing

Technical Specifications

Material	High-purity fused quartz
Configuration	Open at both ends
Reference SiO₂ Purity	99.99–99.9997%
Appearance	Transparent
Mohs Hardness	7
Reference Maximum Temperature	1200°C
Reference Minimum Temperature	−198°C
Linear Thermal Expansion	5.5 × 10⁻⁷ K⁻¹
Thermal Conductivity	1.4 W·m⁻¹·K⁻¹
Dielectric Constant	≥3.7

Standard Sizes

OD	ID	Wall	Length
25 mm	21 mm	2 mm	600 mm
25 mm	21 mm	2 mm	1000 mm
30 mm	26 mm	2 mm	1000 mm
40 mm	34 mm	3 mm	800 mm
40 mm	34 mm	3 mm	1000 mm
50 mm	44 mm	3 mm	600 mm
50 mm	44 mm	3 mm	800 mm
50 mm	44 mm	3 mm	1000 mm
50 mm	44 mm	3 mm	1200 mm
50 mm	44 mm	3 mm	1400 mm
60 mm	54 mm	3 mm	800 mm
60 mm	54 mm	3 mm	1000 mm
60 mm	54 mm	3 mm	1200 mm
60 mm	54 mm	3 mm	1400 mm
80 mm	74 mm	3 mm	1000 mm
80 mm	74 mm	3 mm	1200 mm
80 mm	72 mm	4 mm	1000 mm
100 mm	94 mm	3 mm	1000 mm
120 mm	112 mm	4 mm	1000 mm
130 mm	120 mm	5 mm	1000 mm

Technical Notes

• Maximum usable temperature depends on tube dimensions, support conditions, atmosphere and heating cycle.

• Avoid rapid temperature changes and concentrated mechanical loads, particularly with long or large-diameter tubes.

• Samples should preferably be placed in a suitable quartz or ceramic boat or crucible rather than directly against the tube wall.

• Vacuum or pressure operation must be assessed according to the complete furnace, sealing and tube assembly.

Package Contents

1× High-Purity Fused Quartz Furnace Tube
Open ends — selected OD × ID × length

Selection & Use

The standard range has been selected around common laboratory tube-furnace configurations, with several combinations of outer diameter, wall thickness and tube length. Each tube is supplied as a straight, open-ended quartz process tube. Size selection should take into account the furnace bore, sealing arrangement, heated-zone length and the required tube extension beyond the furnace body. Additional dimensions are available for non-standard installations.

Fused Quartz Tube — Open Ends

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Key Features

Typical Applications

Key Features

Typical Applications

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