# 4-38mm Lead Free Soda Lime Glass Tube for Lamp Flare Tube, Exhaust Tube, Industrial Vent Pipe

> 4-38mm Lead Free Soda Lime Glass Tube for Lamp Flare Tube, Exhaust Tube, Industrial Vent Pipe — a precision glass tube / rod: Glass. Specs, RFQ checklist…

- Page: https://machiningglass.com/products/4-38mm-lead-free-soda-lime-glass-tube-for-lamp-flare-tube-exhaust-tube-industrial-vent-pipe/
- SKU: MG-9D91A9
- Category: Laboratory & Analytical Glass > Precision Glass Capillaries, Tubes & Rods
- Image: https://machiningglass.com/wp-content/uploads/2026/10/4-38mm-Lead-Free-Soda-Lime-Glass-Tube-for-Lamp-Flare-Tube-Exhaust-Tube-Industrial-Vent-Pipe.webp
- Updated: 2026-10-24

Application: Cosmetics, Toothpaste, Food, Medicine, Chemical. Model: HH Lighting glass 04.

## Overview

4-38mm Lead Free Soda Lime Glass Tube for Lamp Flare Tube, Exhaust Tube, Industrial Vent Pipe: a precision glass tube / rod made from Glass. Optical / electrical data: transmittance (546nm)92%, sheet resistance Resist Weak Acid & Neutral Aqueous Solution. It is used in Lighting Tube and Melting or Sealing. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Material | Glass |
| Application | Lighting Tube, Melting or Sealing |
| Usage | Cosmetics, Toothpaste, Food, Medicine, Chemical |
| Feature | recyclable |
| Model NO. | HH Lighting glass 04 |
| Color | Transparent |
| Surface Treatment | Offset Printing |
| Item | 4-38mm Soda Lime Glass Tube for Neon Bulb & Tube |
| Use | Food and Medical Packaging |
| Chemical Resistance | Resist Weak Acid & Neutral Aqueous Solution |
| Process | Easy Cutting, Blowing, Bending, Sealing, Flame Pol |
| Feature 1 | High Light Transmittance, Lead-Free, Arsenic-Free |
| Thermal Expansion | Medium |
| Certification 1 | ISO Standard, Food Contact Safe, Cosmetic Grade S |
| Inspection | Full Batch Inspection for Bubble, Striae, Dimensio |
| End Treatment | Plain Cut Ends / Fire Polished Ends |
| Eco-friendly & compliant | No lead, no heavy metal precipitation, meet EU RoHS & REACH standards, smooth customs clearance for European and American markets. |
| High transparency | Visible light transmittance over 92%, clearly observe internal gas flow and combustion status. |
| Excellent hot workability | Moderate softening point, easy for flame flaring, vacuum sealing and lamp stem processing. |
| Weak acid & alkali resistance | Stable against common flue gas, suitable for exhaust and flare vent systems. |
| Thermal stability | Full annealing greatly reduces thermal expansion cracking risk under long-time high temperature. |
| Large production capacity | Stable mass output, competitive cost for bulk orders. |
| Outer Diameter | 3mm-100mm, customized special sizes acceptable |
| Wall Thickness | 0.2mm-3mm, uniform wall without eccentricity |
| Length | 300mm-3000mm, cut according to customer demand |
| Custom Processing | Single/double flaring, vacuum exhausting, frosted surface, scale printing, fire polishing |
| Tolerance | OD ±0.1mm, length ±2mm, consistent batch performance |
| Inner | Each tube wrapped with PE film, separated by paper dividers to prevent scratches. |
| Outer | Thick 5-layer corrugated cartons, wooden pallets optional for bulk sea shipment. |
| Coefficient of mean linear thermal expansion | 98.0× 10-7/degree |
| Softening point | 695degree |
| Annealing point | 514 degree |
| Density | 2.47g/cm3 |
| Light Transmittance | (546nm)92% |
| Standard size | Diameter 7mm to 35mm |
| Supplier | Jinan Honhai Glass Company Limited |

## What to specify when you request a quote

- **Material** — listed as “Glass”; name the glass (borosilicate 3.3, quartz, soda-lime).
- **OD, ID and wall** — listed as “HH Lighting glass 04”; give outer and inner diameter or wall and their tolerances.
- **Length and ends** — listed as “Plain Cut Ends / Fire Polished Ends”; give length, end finish and any closed or flared ends.
- **Straightness and bore** — state straightness and bore tolerance for precision tubing.

## 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 [Borosilicate Glass Wafers for Robust Appliance Sensor Components](https://machiningglass.com/applications/borosilicate-glass-wafers-for-robust-appliance-sensor-components/). 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 [4-inch Borofloat 33 Glass Wafers](https://machiningglass.com/products/4-inch-borofloat-33-glass-wafers/).

## FAQ

### What is the 4-38mm Lead Free Soda Lime Glass Tube for Lamp Flare Tube, Exhaust Tube, Industrial Vent Pipe made of?

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

### What optical or electrical performance does it have?

Listed values: transmittance (546nm)92%, sheet resistance Resist Weak Acid & Neutral Aqueous Solution. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this precision glass tube / rod used?

Listed applications: Lighting Tube and Melting or Sealing.

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

Include material, od, id and wall, length and ends and straightness and bore, 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=19683#mg-rfq

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