Pyrex glass tubes are renowned for their durability, chemical resistance, and ability to withstand extreme temperatures. They are widely used in laboratories, industries, and scientific research due to their superior performance and versatility. When it comes to choosing the right Pyrex glass tube for your application, understanding the various sizes available is crucial. This guide will walk you through the different Pyrex glass tube sizes, their applications, and how to choose the right one for your needs.

Understanding Pyrex Glass Tube Sizes

Pyrex glass tubes are typically measured and specified by their outer diameter (OD) and wall thickness. The most common units of measurement are millimeters (mm) and inches (in). The size range of Pyrex glass tubes is extensive, catering to a wide array of applications. Here's a breakdown of common Pyrex glass tube sizes:
- Small Bore Tubes: These tubes have an outer diameter ranging from 2 mm to 13 mm (or 1/16" to 1/2"). They are ideal for applications that require a narrow passage, such as capillary action, gas chromatography, and micro-scale reactions.
- Medium Bore Tubes: With an outer diameter ranging from 16 mm to 50 mm (or 5/8" to 2"), these tubes are versatile and suitable for various applications, including liquid chromatography, distillation, and general laboratory use.
- Large Bore Tubes: These tubes have an outer diameter greater than 50 mm (or 2") and are designed for large-scale reactions, vacuum systems, and high-temperature applications, such as furnace tubes and heat treatment processes.

Pyrex Glass Tube Sizes: Detailed Chart
To help you make an informed decision, we've compiled a detailed chart outlining common Pyrex glass tube sizes, their outer diameters, and wall thicknesses.

| Tube Size | Outer Diameter (OD) | Wall Thickness |
|---|---|---|
| 2 mm | 2 mm | 0.5 mm |
| 4 mm | 4 mm | 0.5 mm |
| 6 mm | 6 mm | 0.5 mm |
| 8 mm | 8 mm | 0.5 mm |
| 10 mm | 10 mm | 0.5 mm |
| 12 mm | 12 mm | 0.5 mm |
| 13 mm | 13 mm | 0.5 mm |
| 16 mm | 16 mm | 1 mm |
| 18 mm | 18 mm | 1 mm |
| 20 mm | 20 mm | 1 mm |
| 25 mm | 25 mm | 1 mm |
| 28 mm | 28 mm | 1 mm |
| 32 mm | 32 mm | 1 mm |
| 35 mm | 35 mm | 1.5 mm |
| 40 mm | 40 mm | 1.5 mm |
| 50 mm | 50 mm | 1.5 mm |
| 60 mm | 60 mm | 2 mm |
| 70 mm | 70 mm | 2 mm |
| 80 mm | 80 mm | 2 mm |
| 100 mm | 100 mm | 2 mm |
| 120 mm | 120 mm | 2 mm |
| 150 mm | 150 mm | 2 mm |
Choosing the Right Pyrex Glass Tube Size
When selecting the appropriate Pyrex glass tube size for your application, consider the following factors:

- Tube Diameter: Choose a tube with an appropriate inner diameter to accommodate your sample volume and ensure efficient fluid flow.
- Wall Thickness: Consider the wall thickness based on the required strength and durability for your application. Thicker walls provide better resistance to breakage and can withstand higher temperatures and pressures.
- Tube Length: While not directly related to size, consider the required tube length for your application. Pyrex glass tubes are available in various lengths, from a few centimeters to several meters.
- Tube Ends and Fittings: Ensure that the chosen tube is compatible with your existing equipment and fittings. Pyrex glass tubes can be supplied with various end types, such as ground glass joints, or with custom fittings.
In conclusion, understanding Pyrex glass tube sizes is essential for selecting the right tube for your application. By considering the factors outlined in this guide, you can make an informed decision and ensure optimal performance and safety in your experiments or processes.
















