Product
Soda-Lime Glass Tube
Soda-lime glass tubing provides clear visibility, easy processing, and economical performance for general-purpose applications without rapid temperature changes.
Technical Specifications
| Product Type | Gauge glass tube |
|---|---|
| material | Soda-lime silicate glass |
| Color | Clear / Transparent |
| Ends | Cut, fire-polished, or ground |
- Suitable for low-temperature, non-pressurized applications.
- Standard and custom sizes are available.
- Cutting, end finishing, printing, and other processing are available upon request.
Gauge Glass Tubes
Product Description
Soda-lime glass tube is a transparent and economical glass tubing solution manufactured primarily from silica, sodium oxide, and calcium oxide. Its good optical clarity allows liquids, gas flow, filling levels, and internal components to be observed directly.
Compared with borosilicate and quartz tubes, soda-lime tubing is easier and more economical to manufacture in large quantities. It can be cut, fire-polished, printed, coated, bent, and processed into different lengths and shapes. These characteristics make it suitable for general industrial components, display tubes, packaging, decorative products, low-temperature liquid observation, and other applications that do not require high thermal-shock resistance.
Typical soda-lime glass has a coefficient of thermal expansion of approximately 8.6–9.1 × 10⁻⁶ K⁻¹, considerably higher than that of borosilicate glass. It should therefore not be exposed to direct flame or rapid heating and cooling. The material’s softening point of approximately 685–720°C is a manufacturing property and should not be interpreted as its safe continuous operating temperature.
For practical applications, soda-lime glass tubes are recommended mainly for ambient or moderate-temperature service. The final permissible temperature, pressure, and thermal variation must be determined according to the tube diameter, wall thickness, length, end condition, installation method, and operating medium.
Key Features and Advantages
Clear visual observation
The transparent glass wall enables direct viewing of liquids, gas flow, filling levels, and internal components.
Economical material choice
Soda-lime glass offers a cost-effective solution for general-purpose and high-volume applications.
Easy to process
Tubes can be cut, fire-polished, ground, printed, coated, bent, or assembled according to the application.
Good dimensional flexibility
Different outer diameters, wall thicknesses, and lengths can be produced to match customer drawings or samples.
Smooth and non-porous surface
The glass surface is easy to clean and does not absorb odors or ordinary liquids.
Good resistance to many common media
Suitable for water, oils, weak acids, and many general liquids when operating conditions are properly controlled.
Multiple appearance options
Clear tubing is standard, while colored, frosted, printed, or coated versions can be supplied upon request.
Technical Specifications
| Property | Typical Value |
| Glass Type | Soda-lime silicate glass |
| Density at 20–25°C | Approximately 2.44–2.50 g/cm³ |
| Mean Linear Thermal Expansion | 8.6–9.1 × 10⁻⁶ K⁻¹ |
| Thermal Expansion Test Range | Approximately 20–300°C |
| Transformation Temperature, Tg | Approximately 525°C |
| Strain Point | Approximately 514°C |
| Annealing Point | Approximately 530–546°C |
| Softening Point | Approximately 685–726°C |
| Refractive Index | Approximately 1.51–1.52 |
| Suggested Service Condition | Ambient to moderate temperature; avoid thermal shock |
| Pressure Rating | Must be evaluated according to dimensions and assembly |
Sizes
Soda-lime glass tubes are available in a wide range of outer diameters, inner diameters, wall thicknesses, and lengths. Small-diameter capillary or indicator tubing and larger general-purpose tubing can be supplied according to the required application.
Straight-cut lengths are available for secondary processing or assembly. Finished tubes can also be supplied with fire-polished ends, ground ends, closed ends, flared ends, bends, graduation marks, printed lines, colored coatings, or other customized features.
For an accurate quotation, please provide:
- Outer diameter and inner diameter, or outer diameter and wall thickness
- Required tube length and dimensional tolerances
- End treatment and additional processing
- Quantity and packaging requirements
- Operating temperature and maximum temperature change
- Operating pressure or vacuum condition
- Type and concentration of the process medium
- Drawing, photograph, or sample if the tube has a special shape
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KUNYO Industrial Components Co.,Ltd
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