High-temperature alumina and corundum furnace tubes
Open-ended process tubes, large-diameter tubes and custom tubes for laboratory, resistance, electric and heat-treatment furnaces.
Configurations
- Open-ended process tube
- Large-diameter tube
- Custom tube
Applications
- Laboratory furnaces
- Industrial resistance furnaces
- Electric furnaces
- Heat-treatment furnaces
- Controlled-atmosphere processing
Ordering
- Minimum order, non-standard parts
- 100 pcs
- Usually, per item made to your drawing or sample.
- Samples for approval
- 5–10 pcs
- Usually sent for you to approve before the order runs.
- Production lead time
- 25–30 days
- Usual production cycle for non-standard parts.
- Standard sizes from stock
- ~3–7 days
- Stock covers most standard sizes. Small orders ship in about 3 days, bulk orders in about 7 days.
Typical terms. Quantities and dates for your order are confirmed in its quotation.
Sizes we have produced
- Type
- Open both ends
- OD
- 30–50 mm
- Length
- 1200–1800 mm
Other sizes made to drawing; tolerances confirmed per quotation.
Examples, in mm
| OD | ID | Length | Note |
|---|---|---|---|
| 30 | — | 1800 | |
| 35 | 28 | 1400 | |
| 40 | 30 | 1200 | |
| 40 | 30 | 1300 | |
| 40 | — | 1250 | |
| 50 | — | 1250 |
As marked by the factory on stock labels, packing and photos. A dash means the label gave no inside diameter.
Secondary operations
Done in the factory after forming. Hole sizes and positions are confirmed from your drawing.
- Cut to lengthTubes cut to the ordered length.
- End slotsA slot across a closed tip, or slots cut into open tube and insulator ends.
- Side holes and perforated tubesOne or two side holes, or a line of holes along the tube.
Photographed at the factory
Materials and grades
Alumina and corundum. Purity and maximum temperature are confirmed per SKU at quotation.
Full datasheets for both grades| Material | Al₂O₃ % | Working temperature °C | Hardness, Mohs |
|---|---|---|---|
| High-alumina | >85 | 1300–1450 | 8 |
| Corundum | 99 / 99.5 / 99.7* | 1600–1800* | 8-9 |
* Stated per SKU. Not every corundum product is 99.7% Al₂O₃ or suitable for 1800 °C; the grade and maximum temperature of each part are confirmed in its quotation.
What to send for a quote
- 01OD, ID and length
- 02End finish, flanges or other features, with a drawing if you have one
- 03Maximum operating temperature and atmosphere
- 04Heating and cooling rates, if known
- 05Al₂O₃ grade
- 06Quantity
Next family:Alumina and corundum crucibles and boats
Request a quote
Get a quotation for furnace tubes.
Tell us the dimensions, grade and quantity. A contractual datasheet with current, product-specific test data and tolerances comes with each quotation.