Borosilciate 3.3 Glass Tube for Solar Collector Tubes

Product Description

Product Description

High borosilicate 3.3 glass tube

Borosilicate 3.3 glass is a widely used special heat-resistant glass material with a thermal expansion coefficient of only 3.3×10-6/K. It features outstanding thermal stability and chemical inertness. The tube body is completely transparent without bubbles or striae, which makes it a superior alternative to ordinary soda-lime glass for high-temperature and acid-base corrosive working environments.

Core Advantages

Excellent thermal shock resistance: Resist sudden temperature change up to 150°C without cracking
Ultra-high light transmittance: Superior transmission for visible and ultraviolet light, free of impurities and dark spots
Outstanding chemical resistance: Resistant to acids, alkalis and organic solvents, no harmful substance precipitation
Ultra-low thermal expansion: Stable dimension under high temperature conditions
Good mechanical performance: Thick-wall versions own strong compression & impact resistance; deep processing services including flange forming, polishing, frosted cutting are available

Physical data of COE 3.3 borosilicate glass tube

No.	Physics Performance	Numerical Value	Unit
1	Medium coefficient of linear expansion α20/300 acc.To DIN 52328	3.3 ± 0.1	10-6 K-1
2	Transformation Temperature	525 ± 15	degree Celsius
3	Upper annealing temperature	560 ± 10	degree Celsius
4	Softening point	820 ± 10	degree Celsius
5	Working temperature	1260 ± 20	degree Celsius
6	Maximum short-time working temperature	500	degree Celsius
7	20 degree Celsius  Density ρ	2.23 ± 0.02	g/cm3
8	Modulus of elasticity E	64	103 N/mm2
9	Poisson's ratio	0.20	1
10	Thermal productivity(20 degree Celsius -100 degree Celsius )	1.2	W/m2K
11	Temperature for the specific electrical resistance of 108·cm(DIN52326)tk 100	250	degree Celsius
12	Stress-optical constant(DIN52314)K	4.0	10-6mm2/N

Chemical data of COE 3.3 borosilicate glass tube:

Composition	SiO2	B2O3	Na2O + K2O	Al2O3
approx.weight %	81	13	4	2

high borosilicate 3.3 glass tube
Description	Rate
Water resistance to ISO720	1
Water resistance to European Pharmacopoeia	1
Water resistance to USP23	1
Acid resistance Class(DIN12116)	1
Alkali resistance Class(ISO695)	2

Main Application Fields

Laboratory equipment: Glass reactors, test tubes, distillation columns, measuring cylinders
Industrial sight glass: Boiler sight cylinder, pipeline flow observation tube, chemical reaction kettle viewport
Lighting & optics: High-temperature lamp housing, UV light protective sleeve
Medical & pharmaceutical: Sterile glass packaging, laboratory sampling tubes
Household & new energy: Heat-resistant glass containers, battery observation casings

Certifications & Quality Inspection

All our products pass strict factory quality inspection and international authoritative certification. We support third-party testing and provide complete certification documents:
- CE Safety Certification
- RoHS Environmental Protection Certification
- Food Grade Material Safety Report
- Product Quality Inspection Report
- ISO9001 Quality Management System Certification
- Factory production qualification certificate

Shipping & Delivery

Sample order: 1-3 working days delivery
Bulk order: 7-15 working days according to order quantity
Shipping method: Sea freight, air freight, international express (DHL/FedEx/UPS), railway transportation
Support FOB, CIF, CFR, DDP and other international trade terms

Our Services

OEM & ODM Customization: Support custom outer diameter, wall thickness, length, cutting, drilling, bending, printing logo and deep processing
Free Sample Service: Provide free samples for quality inspection, customers only need to bear the freight
Strict Quality Control: Full-process quality inspection, support third-party factory audit and product testing
Professional After-sales: 12-month warranty period, damage replacement support, solve product problems within 24 hours
Full-set Trade Documents: Provide CO, CIQ, commercial invoice, packing list and other export documents
One-stop Service: From design, production, processing to packaging and transportation, one-stop customized service

FAQ

Q1: Are you a factory or trading company? A1: We are a professional high borosilicate glass product manufacturing factory with independent production workshop, processing equipment and export qualification, providing factory direct sales price.
Q2: Can I get free samples? A2: Yes, we can provide free standard samples, you only need to pay for the international express freight. Customized sample needs a small sample fee, which can be refunded after bulk order.
Q3: What is your MOQ? A3: We support small batch trial order. Standard products have no strict MOQ limit; customized products MOQ is negotiable according to specifications.
Q4: How to ensure the products will not be damaged during transportation? A4: We adopt bubble film + fixed foam + export wooden box/carton triple shockproof packaging, with rich export packaging experience, greatly reducing product damage rate. If damaged during transportation, we will reissue for free.
Q5: Can you accept customized processing? A5: Absolutely. We support various deep processing technologies such as cutting, bending, drilling, frosting, printing logo, and can customize all sizes and styles according to customer drawings and requirements.
Q6: What is the delivery time? A6: Standard in-stock products can be delivered within 3 working days; conventional bulk orders take 7-15 working days; customized special products take 15-25 working days.