Quartz Glass Tube: Length Range 150-1800mm, OH Content <10ppm

Component Specifications

Definition

A specialized cylindrical component made from fused quartz (silicon dioxide) with exceptional UV transparency, specifically engineered for UV-C germicidal applications. It serves as both the protective envelope for mercury vapor discharge and the optical medium that transmits 254nm ultraviolet radiation while containing the plasma arc. The tube's material properties prevent UV absorption and maintain structural integrity under thermal cycling from 40°C to 800°C operating temperatures.

Working Principle

Functions as an optical waveguide and containment vessel in low-pressure mercury vapor discharge lamps. When electrically excited, mercury atoms within the tube emit 253.7nm ultraviolet radiation (UV-C). The quartz material's high transmittance (>90% at 254nm) allows this germicidal UV to pass through with minimal absorption, while its low thermal expansion coefficient maintains vacuum integrity during rapid temperature changes.

Materials

Fused quartz (SiO₂) with OH content <10ppm, typically Type 214 or equivalent. May include dopants like titanium dioxide (0.5-1.5%) for ozone-free operation or cerium oxide for UV stabilization. Material purity: 99.995% SiO₂ minimum.

Technical Parameters

Parameter	Typical range	Notes & selection driver
OH Content	<10ppm
Bubble Class	0 according to ISO 10110-3
Length Range	150-1800mm
Wall Thickness	1.0-1.5mm
Operating Temperature	-40°C to 900°C
Outer Diameter Tolerance	±0.2mm
Thermal Shock Resistance	ΔT > 1000°C
UV Transmission At 254nm	>90%

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10110-3, DIN 58927-6, IEC 61195, UL 1993

Parent Products

This component is used in the following industrial products

UV-C Germicidal Lamp

A UV-C lamp that emits 253.7 nm ultraviolet radiation to inactivate microorganisms on surfaces and in air.

View Product Details

Engineering Analysis

Risks & Mitigation

Devitrification (crystallization) at sustained high temperatures reducing UV transmission
Microcrack propagation from thermal shock
Surface contamination reducing UV output
Mercury diffusion through quartz at extreme temperatures

FMEA Triads

Trigger: Sustained operation above 900°C
Failure: Devitrification causing UV transmission loss >30%
Mitigation: Implement temperature monitoring with automatic shutdown at 850°C, use titanium-doped quartz for higher crystallization resistance

Trigger: Rapid cooling from operating temperature
Failure: Thermal stress cracking leading to vacuum loss
Mitigation: Design gradual cooling cycles, use quartz with controlled OH content for better thermal shock resistance

Trigger: Surface contamination from organic compounds
Failure: UV absorption reducing disinfection efficiency by 40-60%
Mitigation: Regular cleaning protocols, install pre-filters on air intake, use hydrophobic surface treatments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

OD: ±0.2mm, Wall thickness: ±0.1mm, Length: ±1.0mm, UV transmission: ±2%

Test Method

UV-VIS spectrophotometry per ISO 9050, dimensional verification with laser micrometers, bubble classification per ISO 10110-3, thermal shock testing with 1000°C ΔT

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Quartz Glass Tube

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Aohong Special Glass Manufacturing Co., LTD.

Hebei, CN

Also makes: Level Gauge, Viewing Port

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “quartz glass tube”
View source page ↗ hsahglass.com · checked 2026-09-07

View profile Send enquiry

VY Optoelectronics

Changchun, Jilin, CN

Also makes: Objective Lens, Precision Aspheric Lens Element

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Quartz Glass Tube”
View source page ↗ vyoptics.com · checked 2026-09-13

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

Why is quartz glass necessary instead of regular glass for UV-C lamps?

Quartz glass transmits 254nm UV-C radiation with >90% efficiency, while regular soda-lime glass absorbs virtually all UV-C wavelengths. The high purity fused quartz also withstands the thermal cycling and mercury vapor environment.

What maintenance do quartz glass tubes require?

Periodic cleaning with isopropyl alcohol to remove dust and organic films that can reduce UV transmission. Avoid mechanical abrasion and chemical cleaners that might etch the surface. Regular inspection for microcracks or devitrification.

How long do quartz glass tubes typically last in germicidal applications?

Properly manufactured tubes can last 8-12,000 operating hours before UV transmission drops below 80% of initial value. Lifespan depends on operating temperature cycles, ozone exposure, and mechanical stress.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Quartz Glass Tube