3H Glass | Borosilicate & Quartz Glass Solutions for Industrial Applications

About 3H Glass

Honest Glass, operating as 3H Glass, has over 12 years of experience in precision glass processing. We specialize in manufacturing high-quality borosilicate and quartz glass products for demanding industrial environments.

Equipped with advanced technology including laser cutting, tempering furnaces, double-sided grinding, and hot melting furnaces, we deliver customized glass solutions with strict quality control. Every product is inspected before shipment to ensure reliability.

12+ Years Experience

0 Complaints

3h To North China Port

Global Reach

Why Choose 3H Glass?

We combine experience, precision, and reliability to deliver unmatched glass solutions.

Complaints Since Inception

Our commitment to quality ensures complete customer satisfaction.

12+

Years of Expertise

Over a decade of experience in industrial glass processing.

To Major Port

Strategically located for fast and efficient global shipping.

Strict QC

Quality Control

Every product is rigorously tested before shipment.

Our Products

High-performance glass solutions engineered for durability, thermal resistance, and optical clarity.

Borosilicate Sight Glass

Thermally tempered with low thermal expansion coefficient. Ideal for level gauges in harsh environments.

✓ Waterproof: DIN-ISO719-HGB1/HGA1
✓ Max Temp: <450°C

Borosilicate Reflex Gauge Glass

Designed for precise liquid level monitoring with excellent optical clarity and thermal stability.

✓ Waterproof: DIN-ISO719-HGB1/HGA1
✓ Max Temp: <450°C

Borosilicate Transparent Glass

Manufactured from "extra-hard" borosilicate glass with high transparency and chemical resistance.

✓ Waterproof: DIN-ISO719-HGB1/HGA1
✓ Max Temp: <450°C

Flat Borosilicate Glass

Tempered flat glass with low thermal expansion and excellent thermal stability.

✓ Low thermal expansion
✓ High thermal stability

Quartz Glass

High-purity silica glass with exceptional heat and corrosion resistance.

✓ Max Temp: 1100–1200°C
✓ Resists most acids

Custom Shapes

Custom Glass Fabrication

We offer tailored cutting, drilling, and shaping to meet your exact specifications.

✓ Laser & CNC Precision
✓ Fast Turnaround

Laminated Glass

Laminated Safety Glass

Multi-layer construction for enhanced strength and safety in critical applications.

✓ High impact resistance
✓ Custom interlayers

Bent Glass

Curved & Bent Glass

Precision bending for specialized instrumentation and marine applications.

✓ Smooth curvature
✓ Thermal & mechanical strength

Industry Applications

Our glass products serve critical roles across multiple high-demand sectors.

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Petro-Chemical

Used in level gauges for petroleum, chemical, and metallurgical plants due to high thermal and chemical resistance.

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Instrumentation

Ideal for ovens, fireplaces, and industrial instruments requiring heat-resistant transparent panels.

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Lighting Industry

High light transmittance (up to 90%) and thermal stability make it perfect for specialized lighting.

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Marine Engineering

Superior impact strength compared to tempered glass, ideal for marine observation and safety systems.

Frequently Asked Questions

What is the difference between borosilicate and aluminosilicate glass?

Borosilicate Gauge Glass and Aluminosilicate Glass are both used in industrial applications. Borosilicate has a lower thermal expansion coefficient and higher thermal shock resistance, while aluminosilicate offers higher mechanical strength.

What does DIN 7080 specify for sight glasses?

The DIN 7080 standard defines specifications for circular sight glasses in regular service, including dimensions, pressure ratings, and material requirements for safe operation.

How does borosilicate glass differ from soda-lime glass?

Borosilicate glass contains silicon and boron, giving it a low expansion coefficient, high temperature resistance, and superior chemical durability compared to soda-lime glass.

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Precision Glass Solutions
for Industrial Excellence

About 3H Glass