Product type: Glass Tube. Application: Chemistry. Model: 7067.
Overview
Borosilicate/Pyrex Glass Tube/Tubes for Boiler Sight Cylinder is a precision glass tube / rod made from Glass Tube. Optical / electrical data: transmittance Superior transmission for visible and ultraviolet light, free of impurities and dark spots, sheet resistance Resist sudden temperature change up to 150°C without cracking. Temperature Heat Resisitant. Listed for Chemistry applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Type | Glass Tube |
|---|---|
| Application | Chemistry |
| Model NO. | 7067 |
| Glass Type | Glass Tube |
| Materails | Borosilciate 3.3 Glass |
| Coe | 3.3*10-6 |
| Temperature | Heat Resisitant |
| Shock | Shock Resistant |
| Color | Transparent |
| Excellent thermal shock resistance | Resist sudden temperature change up to 150°C without cracking |
| Ultra-high light transmittance | Superior transmission for visible and ultraviolet light, free of impurities and dark spots |
| Outstanding chemical resistance | Resistant to acids, alkalis and organic solvents, no harmful substance precipitation |
| Ultra-low thermal expansion | Stable dimension under high temperature conditions |
| Good mechanical performance | Thick-wall versions own strong compression & impact resistance; deep processing services including flange forming, polishing, frosted cutting are available |
| Chemical data of COE 3.3 borosilicate glass tube | Composition |
| Laboratory equipment | Glass reactors, test tubes, distillation columns, measuring cylinders |
| Industrial sight glass | Boiler sight cylinder, pipeline flow observation tube, chemical reaction kettle viewport |
| Lighting & optics | High-temperature lamp housing, UV light protective sleeve |
| Medical & pharmaceutical | Sterile glass packaging, laboratory sampling tubes |
| Household & new energy | Heat-resistant glass containers, battery observation casings |
| Supplier | Jinan Everest Glass Company Limited. |
Technical data
| 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 |
| 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
- Material — listed as “Glass Tube”; name the glass (borosilicate 3.3, quartz, soda-lime).
- OD, ID and wall — listed as “7067”; give outer and inner diameter or wall and their tolerances.
- Length and 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. How parts like this are machined and finished is covered in 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. Before sending a drawing, check Precision Glass Material Selection: Fused Silica vs Borosilicate & More. A related standard product is 4-inch Borofloat 33 Glass Wafers.
