30 × 23 mm alumina furnace tube
OD 30 mm · ID 23 mm · wall 3.5 mm
- Standard size · usually in stock
An open-ended alumina work tube for laboratory, resistance, electric and heat-treatment furnaces. The sample or process gas runs through the bore, and the tube keeps it apart from the heating elements.
Specifications
Nominal dimensions from our factory's standard-size list, September 2026.
| Outside diameter (OD) | 30 mm |
|---|---|
| Inside diameter (ID) | 23 mm |
| Wall thickness | 3.5 mmcomputed: (OD − ID) ÷ 2 |
| Length | Cut to order |
| Availability | Usually ships from stock in 3–7 days |
| Material and grade | Alumina and corundum. Grades: 99.5% Al₂O₃ (C799-class) as standard, plus 99.7%, 99% and 95%, all available. Purity and maximum temperature are confirmed per SKU at quotation. |
Tolerances on our 2026 orders
No order tolerance is on record for this size yet. We state the tolerance in the quotation.
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.
Request a quote
Get a quotation for the 30 × 23 mm furnace tube.
Tell us the dimensions, grade and quantity. We confirm the grade, dimensions and tolerances in each quotation. Our yearly lab reports are available on request.