What sizes of fused quartz tube can VEZLO produce?

Standard transparent fused quartz tubes are produced from 2 mm to 500 mm outer diameter. A 520 mm large-diameter high-purity quartz tube has also been developed for semiconductor diffusion and oxidation furnaces. Wall thickness, length and end finishing are made to drawing.

What is the difference between fused quartz and fused silica?

Fused quartz is made by melting high-purity natural quartz crystal or sand, while synthetic fused silica is produced from silicon-based precursors such as SiCl4. Synthetic silica offers higher deep-UV transmission, while fused quartz provides excellent thermal stability and purity at a lower cost for lamps, furnaces, labware and most industrial uses.

Do you accept OEM and ODM custom quartz parts?

Yes. VEZLO manufactures to customer drawings, including tubes with closed or flared ends, ground joints, flanges, quartz boats, cleaning tanks, crucibles, plates, windows and rods, as well as private-label packaging.

How fast does VEZLO respond to technical requests?

The average response time is within 2 hours, and around 50% of buyers place repeat orders. Requirements can be sent to info@vezloquartz.com or via the contact page.

How are fragile quartz products packed for export?

Quartz parts are typically protected individually with foam or pearl cotton, then packed in reinforced cartons or fumigation-free plywood cases suitable for sea, air and express shipping.

Industrial High-Purity Silica White Paper

OEM/ODM Quartz Lamp Tube Suppliers & Exporter serving the Los Angeles Market

Q: What is an ozone-free quartz tube?

An ozone-free quartz tube is doped to absorb the 185 nm ultraviolet line that converts oxygen into ozone, while still transmitting the 254 nm germicidal wavelength. It is widely used for UV sterilization lamps in water, air and surface disinfection where ozone is not wanted.

Precision Fused Silica Thermal Solutions, Sub-PPM Chemical Purity & Rapid Direct Delivery for Southern California's Semiconductor, Aerospace, Photochemical, and Advanced Manufacturing Sectors.

OD 2-520mm

Continuous draw & large-diameter thermal tube capability

≤ 20ppm

Total elemental metallic impurity threshold (HP raw quartz)

1100°C

Continuous working temperature without plastic deformation

≤ 2Hours

Technical design review & RFQ turnaround time

Precision Engineered Lineup

OEM/ODM Fused Quartz Lamp Envelopes & Optical Substrates

Manufactured from ultra-pure natural quartz sands in Donghai, China, and tailored to custom engineering drawings. Each component delivers exceptional thermal-shock resistance, tight wall thickness tolerances, and tailored spectral transmission curves.

Thermal Shock Resistant

Quartz Plate for Laboratory Fused Silica Clear Heat Resistant Custom

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Glassblowing Blank

Quartz Glass Tube Raw Stock Clear Fused Silica Transparent Pipe Blank Custom Length

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Semiconductor Grade

Quartz Plate 100x100mm 200x200mm Fused Silica Clear Custom Cut

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Deep-UV / IR Window

Quartz Glass Plate for Optical Window Fused Silica High Transmittance

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Large Diameter Clear Quartz Borosilicate Glass Tube round Fused Silica

OD 100–520mm Heavy Wall

Large Diameter Clear Quartz Glass Tube Round Fused Silica Pipe

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High Pressure Sight Port

Quartz Sight Glass Plate Boiler Fused Silica High Temperature Resistant

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Laser Polished Edges

Round Quartz Plate Disc Fused Silica Clear Polished Custom Diameter

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CNC Ground Tolerances

Rectangular Quartz Plate Fused Silica Clear Precision Cut Custom Size

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Engineering White Paper

High-Purity Fused Quartz Physical & Dielectric Matrix

Fused silica and electric-melt quartz are critical to high-intensity discharge (HID), ultraviolet curing, xenon strobe, and infrared thermal emitter configurations. The structural stability of pure amorphous silicon dioxide (SiO&sub2; ≥ 99.99%) provides immunity against plastic deformation and thermal shock up to extreme operational ceilings.

Material Metric	Measured Value (SI / Imperial)	Operational Significance for OEM Lamp Designers
Silicon Dioxide Purity (SiO&sub2;)	≥ 99.99% (≤ 20 ppm Total Metals)	Prevents ionic drift, devitrification nucleation, and blackening in halogen and discharge lamp envelopes.
Coefficient of Thermal Expansion (CTE)	5.5 × 10−7 cm/cm·°C (20°C – 320°C)	Enables immediate transfer from red-hot states into chilled water baths without cracking or structural rupture.
Softening Point (log η = 7.6)	≈ 1,683°C (3,061°F)	Determines envelope pressure tolerance under elevated filament and arc-discharge operating dynamics.
Annealing Point (log η = 13.0)	≈ 1,215°C (2,219°F)	Target temperature for stress-relief annealing following glassblowing, pinch-sealing, and joint welding.
Continuous Working Temperature	1,100°C (2,012°F)	Maintains mechanical stability during high-intensity UV curing, wafer diffusion, and intense IR heating cycles.
Deep UV Cut-Off (Synthetic vs. Doped)	185 nm (Ozone Generating) / 254 nm (Ozone-Free)	Titanium/cerium doping systematically blocks 185 nm line for ozone suppression in populated medical and cleanroom settings.
Dielectric Constant (ε)	3.75 at 1 MHz – 10 GHz	Low dielectric loss factor across high-frequency RF excitation and microwave plasma excitation lamps.

Localized Applications

Serving Key High-Tech Clusters Across Greater Los Angeles

From cleanrooms in El Segundo to aerospace manufacturing corridors in Torrance and Long Beach, our custom quartz solutions supply precision hardware to California's demanding engineering ecosystems.

Aerospace Thermal & Solar Simulation

Southern California's aerospace corridor (El Segundo, Hawthorne, Long Beach) relies on high-wattage Xenon short-arc and infrared quartz lamps to simulate outer space vacuum-thermal conditions. Our heavy-wall fused quartz tubes withstand cyclic flash transients and extreme gas pressures without envelope failure.

Semiconductor Photolithography & Annealing

Integrated circuit packaging facilities and R&D fabs throughout LA and Orange County utilize mercury-xenon capillary lamps, wafer diffusion furnace process tubes, and quartz carriers. With total transition metals below 20 ppm, our quartz envelopes eliminate sodium and iron outgassing during high-temperature thermal steps.

Municipal & Water Disinfection

Under strict California Title 22 water reclamation statutes, municipal wastewater facilities across the Los Angeles Basin require industrial-scale germicidal UV disinfection. We supply precision ozone-free (254 nm peak) quartz sleeve envelopes engineered to resist biofouling, solarization, and vibrational hydraulics.

Commercial UV Coating & Flexographic Print

Large-format packaging and commercial printing operations centered in the City of Industry and Vernon deploy medium-pressure mercury curing lamps. Our high-transmittance clear quartz tubes prevent early UV browning (solarization), keeping cure systems operating at peak photon output across prolonged production runs.

Biomedical Diagnostics & Flow Cells

Southern California life-science campuses require spectrophotometer cuvettes, capillary flow tubes, and mercury lamp jackets with consistent deep-UV transmission down to 200 nm. Precision mechanical tolerances ensure accurate beam paths and reproducible analytical signals.

Custom Scientific Glassblowing & Neon Art

From Los Angeles research laboratories to local specialty lighting ateliers, artisan glassblowers work with our clear fused silica tubing blanks for flame-worked manifolds, quartz-to-metal vacuum seals, and sculptural illumination components.

Market Intelligence

Los Angeles & Southern California Procurement Trends

Evaluating the regulatory, clean-energy, and supply-chain movements reshaping industrial quartz consumption across the Western United States.

South Coast AQMD Zero-Ozone Mandates

The South Coast Air Quality Management District enforces stringent VOC and ground-level ozone emission targets. Consequently, industrial air purifiers, food processing facilities, and sanitization fixtures across the LA basin are shifting rapidly to titanium-doped ozone-free quartz tubes. These absorb the 185 nm line while passing germicidal 253.7 nm UV rays, ensuring regulatory compliance without post-treatment ozone scrubbers.

Supply Chain Diversification & Direct Sourcing

Supply chain managers across Torrance, Pasadena, and Santa Clarita are moving away from multi-tier domestic distributors to reduce lead times and markups. Direct collaboration with integrated primary manufacturers allows Southern California buyers to maintain bonded safety inventory, customize drawings with sub-millimeter tolerances, and protect production schedules.

High-Power UV-LED vs. High-Intensity Discharge

While narrow-band LED arrays continue to capture select low-temperature curing niches, industrial high-throughput processes—including wide-web converting, wastewater disinfection, and silicon oxidation—rely on broad-spectrum mercury and xenon discharges. Fused quartz envelopes remain the premier material for handling the intense thermal densities and photonic power required by these heavy-duty systems.

Manufacturing Authority

The VEZLO Industrial Edge: From Raw Sand to Precision Envelope

Headquartered in Donghai County—widely recognized as China's quartz hub—VEZLO integrates raw sand beneficiation, thermal continuous drawing, and precision cold processing under one ISO-calibrated quality management system.

Regional Purity Advantage

Operating from a 50-mu production footprint with >RMB 10M in fixed assets, our facility refines 13 grades of high-purity quartz sands. Our raw materials maintain total metallic contaminants ≤ 20 ppm, suppressing bubbling, devitrification, and structural clouding under severe operating conditions.

Provincial & National R&D Recognition

Our 320 mm high-purity quartz process tube was designated a Jiangsu Provincial Science & Technology Support Project. Furthermore, our newly developed 520 mm large-diameter tube completed preliminary reviews for national new products, establishing our technical leadership across large-scale semiconductor furnaces.

Full OEM/ODM Thermal & Cold Finishing

From micro-bore tubing (OD 2 mm) to furnace core envelopes (OD 520 mm), our capabilities include flared ends, precision ground tapers, bubble-free closures, vacuum-tight quartz flanges, optical polishing, and laser-guided cutting to demanding project tolerances.

Direct-to-LA Logistics & Export Packaging

Exporting across North America, Germany, France, and the UK with an established 50% reorder rate. Fragile quartz tubing shipments receive bespoke multi-layer pearl cotton cushioning and export plywood boxing, ensuring break-free delivery via the Port of Los Angeles (POLA) or LAX air cargo.

Client Due Diligence

Los Angeles Quartz Procurement: Frequently Asked Questions

Addressing the technical, regulatory, and logistics inquiries most commonly raised by Southern California procurement and engineering departments.

What outer diameter (OD) and wall thickness ranges are available for OEM quartz lamp tubing?

We manufacture continuous transparent fused quartz tubing ranging from OD 2 mm up to 500 mm as standard production runs, alongside specialized heavy-bore tubes up to 520 mm OD. Wall thicknesses can be drawn from ultra-thin 0.5 mm up to heavy-duty 10 mm+ structures. Custom tolerances can be held to ±0.1 mm on critical diameters upon review of customer drawings.

How do fused quartz and synthetic fused silica envelopes compare in performance and cost?

Natural fused quartz is produced by thermal melting of exceptionally high-purity natural silica sand (≥ 99.99% SiO&sub2;). It offers exceptional thermal-shock resistance, high viscosity, and cost-effective scalability for infrared heaters, UV germicidal fixtures, and industrial lamps. Synthetic fused silica is synthesized via chemical vapor deposition of silicon precursors (e.g., SiCl&sub4;). While synthetic silica extends deep UV transmission down to 160–185 nm with minimal bubble inclusion, natural fused quartz remains the preferred choice for industrial lamp jackets, sight ports, and furnace envelopes.

What is an ozone-free quartz tube, and why is it preferred for California installations?

Ozone-free quartz envelopes are chemically doped with trace metal elements (such as titanium or cerium) during the raw-melt stage. This doping creates a targeted optical absorption band that blocks the 185 nm resonance line responsible for ionizing atmospheric oxygen into ground-level ozone. Concurrently, it maintains high transmission (>85–90%) for the 253.7 nm germicidal band. In Southern California, this enables facilities to meet strict South Coast AQMD worker-safety and indoor-air standards without installing expensive ozone destruct units.

How do you mitigate in-transit breakage risks for fragile quartz shipments bound for Los Angeles?

Our multi-tier export packaging protocols are designed for global logistics across sea, rail, and air. Each quartz tube or optical disc is individually wrapped in high-density polyethylene foam sleeves, anchored in shock-absorbing honeycomb channels, and crated inside heavy, fumigation-free export plywood cases. Pallets are balance-engineered to prevent shifting during container handling at the Port of Los Angeles (POLA/Long Beach) and airport transfers at LAX.

Can you manufacture specialized terminations, ground joints, or sealed domes according to our technical blueprints?

Yes. Beyond standard straight-cut tubing, our Donghai fabrication workshops feature experienced glassblowing technicians, precision CNC mills, and specialized surface grinders. We deliver flame-worked hemispherical or flat closed ends, flared sleeves, threaded fittings, ground ball-and-socket vacuum joints, polished observation discs, and welded quartz flanges tailored precisely to your CAD/PDF schematics.

What information is needed to receive an engineering feasibility review and quotation?

To provide an actionable quotation, our engineering team requires: (1) Dimensional parameters (OD, ID, wall thickness, overall length, and critical tolerances); (2) Required end finish (straight cut, fire-polished, flared, ground joint, or sealed dome); (3) Spectral and material grade (standard clear, ozone-free, or high-purity semiconductor grade); (4) Operating parameters (peak temperature, pressure/vacuum, chemical exposure); and (5) Initial batch and annual volume projections.

Collaborate with Our Fused Quartz Technical Team

Whether you require prototype quartz envelopes for aerospace test chambers in Torrance, bulk UV lamp blanks for regional assembly, or specialized diffusion tubes for semiconductor processing, our engineering specialists will review your drawings within 2 hours.

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