# Half Glass Tube and Rod for Lighting Cover, Lamp Glass Shade

> Half Glass Tube and Rod for Lighting Cover, Lamp Glass Shade — a lamp shade / decorative glass: Borosilicate3.3. Specs, RFQ checklist and custom sizes to…

- Page: https://machiningglass.com/products/half-glass-tube-and-rod-for-lighting-cover-lamp-glass-shade/
- SKU: MG-1FE293
- Category: Industrial, Architectural & Appliance Glass > Lamp Shades, Globes & Decorative Glass
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Half-Glass-Tube-and-Rod-for-Lighting-Cover-Lamp-Glass-Shade.webp
- Updated: 2026-10-24

Application: Chemistry.

## Overview

The Half Glass Tube and Rod for Lighting Cover, Lamp Glass Shade is supplied as a lamp shade / decorative glass made from Borosilicate3.3. It is used in Chemistry. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Material | Borosilicate3.3 |
| Application | Chemistry |
| Color | Transparent |
| Clear | Color |
| Lighting | Flameproof light fittings others |
| Gifts | Decoration/grappa bottles Candlesticks Lanterns Others |
| Interior Decoration | Towel rails |
| Transport | By ship or express |
| Supplier | Jinan Honhai Glass Company Limited |

## Technical data

|   |   |   |   |
| --- | --- | --- | --- |
| 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 108Ω·cm(DIN52326)tk 100 | 250 | degree Celsius |
| 12 | Stress-optical constant(DIN52314)K | 4.0 | 10-6mm2/N |

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

| Parameter | Value |
| --- | --- |
| 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 |

## What to specify when you request a quote

- **Glass type and thickness** — listed as “Borosilicate3.3”; name the glass and thickness.
- **Temperature and pressure** — give working temperature, thermal shock and any pressure rating.
- **Strengthening and safety** — state tempering, lamination or the safety standard.
- **Outline and edges** — send a drawing with outline, holes and edge finish.

## Engineering guides for this part

For material grades and coating options, see [Borofloat 33 Glass: Material Selection for Precision Substrates](https://machiningglass.com/materials/borofloat-33-glass-material-selection-for-precision-substrates/). How parts like this are machined and finished is covered in [Precision Bore Glass Tubing Processing: End-to-End Manufacturing for Industrial Buyers](https://machiningglass.com/capabilities/precision-bore-glass-tubing-processing-end-to-end-manufacturing-for-industrial-buyers/). For an application example, read [Custom LED Cover Glass for Home Appliance Indicator Panels](https://machiningglass.com/applications/custom-led-cover-glass-for-home-appliance-indicator-panels/). Before sending a drawing, check [Precision Glass Material Selection: Fused Silica vs Borosilicate & More](https://machiningglass.com/resources/precision-glass-material-selection-fused-silica-vs-borosilicate-more/). A related standard product is [LED Groove Cover Glass](https://machiningglass.com/products/led-groove-cover-glass/).

## FAQ

### What is the Half Glass Tube and Rod for Lighting Cover, Lamp Glass Shade made of?

It is listed as Borosilicate3.3. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### Where is this lamp shade / decorative glass used?

Listed applications: Chemistry.

### What should I include in a quote request?

Include glass type and thickness, temperature and pressure, strengthening and safety and outline and edges, plus quantity and a drawing if the part is custom.

## Request a quote

Send drawings, tolerances and quantity: https://machiningglass.com/contact/?rfq_product_id=19727#mg-rfq

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Source: Custom Precision Glass Machining — https://machiningglass.com/