Heavy Wall Tubular Gauge Glass | High-Pressure Borosilicate/Quartz Gauge Tube
Product Overview
Heavy wall tubular gauge glass is selected when the application needs a stronger glass tube than a standard-wall version. Heavy wall glass as the highest pressure-rated type in the family, with ends typically ground and the material noted for corrosion resistance, scratch resistance, and improved heat-shock resistance.
Product Alias: heavy wall tubular gauge glass, heavy wall gauge glass, heavy wall gage glass, and clear heavy wall gauge glass tube.
Typical Applications
Heavy wall tubular gauge glass is used in level-indication systems for tanks, reservoirs, boilers, and process vessels.
Typical application areas include:
- tanks and reservoirs
- liquid level monitoring
- low-pressure boilers
- process vessels
- industrial level gauge assemblies
Material and Performance
Material Properties
| Property | Value | Source |
|---|---|---|
| Glass type | Borosilicate glass 3.3 | |
| Density | 2.23 ± 0.02 g/cm³ | |
| Thermal expansion coefficient | 3.3 × 10⁻⁶/K | |
| Softening point | 815 ± 10°C | |
| Strain point | 560 ± 10°C | |
| Bending strength | 160 N/mm² | |
| Young’s modulus | 64 GPa | |
| Heat-shock resistance | Extra resistant to heat shock | |
| Pressure capability | Highest pressure rating in the tubular glass family |
Why Buyers Choose This Product
Heavy wall tubular gauge glass is preferred when you needs stronger pressure capability than standard-wall glass and wants a clear tube that still supports direct level reading. This type is extremely clear, corrosion resistant, scratch resistant, and extra resistant to heat shock.
Technical Specifications
Product Reference Data
| Parameter | Value | Source |
|---|---|---|
| Product type | Heavy wall tubular gauge glass | |
| Common aliases | Heavy wall gauge glass / heavy wall gage glass / heavy wall gauge glass tube | |
| Material | Borosilicate glass 3.3 | |
| Typical OD range | 5/8 in to 3/4 in | |
| End finishes | Cut / ground / fire polished | |
| Pressure ratings | 90 psi to 600 psi, depending on end finish, diameter, and length required | |
| Heat-shock resistance | Extra resistant to heat shock | |
| Typical service envelope | Up to 25 bar and 250°C for the gauge system | |
| Length handling | Final length depends on the gauge design and pressure rating |
Common Size / Pressure Reference
| OD | Typical Use | Pressure Reference | Notes |
|---|---|---|---|
| 5/8 in | Heavy wall gauge applications | 90–600 psi range depending on finish and length | |
| 3/4 in | Heavy wall gauge applications | 90–600 psi range depending on finish and length | Heavy wall is the highest pressure-rated tubular glass type. |
Quality Proof and Evidence
- inspection report
- dimensional check sheet
- pressure or thermal test record
- customer installation photo
- certificate of conformity
FAQ
What is heavy wall tubular gauge glass?
It is a stronger borosilicate glass tube used in level gauge assemblies where higher pressure capability and better heat-shock resistance are required.
What are the common sizes?
Published product information shows heavy wall tubular gauge glass in 5/8 in and 3/4 in outside diameters.
What is the pressure range?
Published datasheets list 90 psi to 600 psi, depending on end finish, diameter, and length required.
What is the temperature range?
For the complete gauge system, published tubular-level-gauge literature cites service up to 250°C.
What material is usually used?
The usual material is borosilicate glass 3.3, which has low thermal expansion and strong chemical durability.
CTA
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