ADCERAX reviews and supplies custom alumina ceramic tubes in open-end, closed-end, single-bore and multi-bore forms, with common OD/ID 2-120 mm, length 10-3500 mm and wall 0.5-20 mm drawing-review ranges.
For furnace, thermocouple protection, insulation and process-equipment RFQs, tube type, bore layout, material grade, temperature, atmosphere and application are checked before quotation.
Send a drawing, old tube photo or sample with OD, ID, length, wall thickness, bore layout, material grade, working temperature, atmosphere, application and quantity for review.
Product Fit
Open-end, closed-end, single-bore and multi-bore alumina tubes
Alumina ceramic tubes are precision tubes made from high-purity aluminium oxide (Al₂O₃), used where parts must handle high temperature, electrical insulation, wear and chemical exposure. They are supplied as open-end, closed-end, single-bore and multi-bore forms for furnace work tubes, thermocouple protection, sensor and heater insulation, and drawing-based custom parts.
Send your drawing, old-part photo or target dimensions first. ADCERAX reviews alumina tube size feasibility together with bore layout, wall thickness, straightness, material grade and working conditions before quotation.
| Specification / RFQ item | ADCERAX review range or note | What to send for review | Why it matters |
|---|---|---|---|
| Outer / inner diameter | Common custom review range: 2-120 mm | OD, ID, drawing or old-part photo | Confirms tube fit, bore clearance and forming feasibility |
| Length | 10-3500 mm, depending on section, straightness and firing route | Total length, support span, insertion length if used in furnace or sensor assemblies | Long tubes need straightness, handling and firing-route review |
| Wall thickness | 0.5-20 mm, reviewed with OD/ID and length together | Wall thickness, pressure/load condition if relevant | Thin-wall and long-tube combinations need case-by-case review |
| Bore layout | Single-bore, 2-hole, multi-bore and custom bore layouts can be reviewed from drawings | Bore count, bore diameter, pitch, conductor/sensor size and cross-section drawing | Bore geometry controls insulation, fit and manufacturability |
| Tolerance / straightness | Up to ±0.05 mm tolerance review for precision assemblies. Use drawing tolerance first; long tubes and tight straightness requirements require engineering review. | Critical tolerance, straightness requirement and inspection priority | Prevents quoting a tube that cannot meet assembly or furnace alignment needs |
| Material grade | Alumina grade should be selected with temperature, atmosphere and application | Requested alumina grade, working temperature, atmosphere and contact media | Helps match ceramic material to thermal, electrical or chemical conditions |
| End design | Open-end, closed-end and shaped ends can be reviewed by drawing | End type, closed-end geometry, chamfer, slot or special feature | End geometry affects firing, assembly fit and use in thermocouple or protection designs |
| Quantity and project stage | Prototype, replacement, trial batch and repeat order should be marked clearly | Quantity, target delivery stage, replacement urgency and old sample/photo if available | Helps ADCERAX respond with the right review depth and quotation route |
Note:These ranges are used for RFQ screening, not a guarantee that every diameter, wall thickness and length combination can be produced.
We provide a comprehensive selection of alumina ceramic pipe types to suit a wide range of industrial, laboratory, and high-temperature applications. Whether you need single-bore, double-bore (2-hole), multi-bore, or closed-end alumina ceramic tubes, ADCERAX can meet your requirements.
Alumina Tube Style
For gas passage, furnace work tubes and insulation sleeves.
✏️Send OD, ID, length and working conditions.
One end sealed, for thermocouple and sensor protection.
✏️Send insertion length, closed-end geometry and sensor size.
For electrode, structural and custom slot assemblies.
✏️Send bore count, bore diameter and pitch.
Customizable as flanged, stepped, threaded or slotted.
✏️Send a drawing with OD, ID and length.
For thermocouple protection and dual-channel sampling.
✏️Send bore diameter, pitch and OD.
For dual-channel thermocouples and electrical isolation.
✏️Send bore count, dia and pitch.
For multi-sensor and multi-path instrumentation
✏️Send bore layout, dia and pitch.
For complex sensor and conductor assemblies.
✏️Send bore count and layout.
Alumina Tube Function
For filtration, gas diffusion and pressure equalization.
✏️Send medium, flow need and dimensions.
For tube-furnace work zones and thermal processing.
✏️Send OD, ID, length, support span and atmosphere.
For abrasion and corrosion resistance in fluid systems.
✏️Send pipe size, medium and wear condition.
For electrical isolation and thermal-barrier assemblies.
✏️Send voltage/insulation need, bore layout and assembly context.
🔹Why alumina: a dense, electrically insulating, chemically stable work tube that holds samples and separates the hot zone in tube furnaces and thermal processing.
🔹What to confirm: working temperature, atmosphere (air / inert / reducing / vacuum), heating & cooling rate, support method and sealing.
🔹Why alumina: a closed-one-end ceramic sheath that protects a thermocouple or sensor from furnace gases while keeping it electrically isolated.
🔹What to confirm: sensor diameter, insertion length, open or closed end, mounting and temperature.
🔹Why alumina: single- or multi-bore tubes route and isolate multiple conductors, heater wires or sensor leads.
🔹What to confirm: bore count, bore diameter, centre spacing and OD.
🔹Why alumina: chemically stable tubing for reaction channels, gas delivery and fluid transport in demanding environments.
🔹What to confirm: medium, atmosphere, pressure and sealing interface.
ADCERAX alumina tubes and ceramic parts are widely used to solve high-temperature insulation, wear resistance, corrosion resistance, and electrical isolation challenges across industrial and laboratory applications.
Not sure which alumina tube fits your application?
Send your application, operating temperature, bore count and tube dimensions, and our engineers will recommend the right tube type, material grade and end form — then prepare a drawing-based RFQ for your exact part.
ADCERAX offers custom alumina ceramic tubes in 96%, 99% and 99.7% Al2O3, with material selection based on operating temperature, insulation requirements, wear conditions, atmosphere and application environment.
Stable structure and dimensions for furnace, kiln and thermal-processing service.
Resists abrasion and wear to extend component life in demanding duty.
Strong dielectric performance for sensor, heater and conductor isolation.
Resists attack from many acids, alkalis and process atmospheres.
| Property | 96% Al₂O₃ | 99% Al₂O₃ | 99.7% Al₂O₃ |
|---|---|---|---|
| Standard Grade | IEC C-786 / ASTM Type II | IEC C-795 / ASTM Type III | IEC C-799 / ASTM Type IV |
| Density | 3.65–3.8 g/cm³ | 3.8–3.9 g/cm³ | ≥3.93 g/cm³ |
| Flexural Strength | 260 MPa | 300 MPa | 330 MPa |
| Hardness | Mohs 8.8 | Mohs 9 | Mohs 9.1 |
| Thermal Conductivity | 22 W/m·K at 20°C | 24 W/m·K at 20°C | 29 W/m·K at 20°C |
| Max Operating Temperature | 1600°C | 1680°C | 1730°C |
| Volume Resistivity | 10¹³–10¹⁵ Ω·cm at 20°C | 10¹⁴–10¹⁵ Ω·cm at 20°C | ＞10¹⁵ Ω·cm at 20°C |
| Typical Use | General high-temperature and wear applications | Higher strength and harsher working conditions | High-purity insulation, vacuum, and demanding thermal environments |
Industry-standard typical values for sintered alumina, confirmed for ADCERAX grades; final purity, property data, certificates and inspection documents are confirmed for the specific RFQ and production batch.
Not sure which grade — and worried about over-spec or early failure?
Send your temperature, atmosphere and environment, and we match the right alumina grade (96 / 99 / 99.7%) so tubes last without overpaying.
Every alumina tube we make is custom — built to your drawing, sample or application, not a fixed catalog part. We review geometry, material and working conditions before quoting.
Dimensions:Custom OD, ID, length and wall thickness to your drawing
Forms :Open-end, closed-one-end, single-bore, multi-bore (2 / 4 / 9), square
Features :Flanged, stepped, threaded, slotted, ground precision, cut-to-length
Material:96 / 99 / 99.5 / 99.7% Al₂O₃, selected by application
Batch:Prototype and small-batch friendly
— send a PDF, STEP or DWG.
— send measurements or a photo to match.
— tell us the conditions and we recommend a type and spec.
ADCERAX is a China-based advanced technical ceramics manufacturer focused on custom alumina ceramic tubes. We review drawings, samples and working conditions to confirm material, dimensions and feasibility before quoting, and support export shipping worldwide.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
24-hour dispatch for standard items, 3-5 weeks for custom orders.
ADCERAX is a professional China alumina ceramics tube manufacturer that offers high-performance components with tight tolerances (±0.05mm) and custom geometries. Using advanced forming methods and CNC machining, we deliver precision-engineered solutions for electronics, chemical, and high-temperature applications.
This table highlights our core technical strengths, including material options, tight tolerances, and advanced manufacturing methods. We offer tailored solutions to meet diverse industrial requirements.
| Technical Capabilities Overview | |
|---|---|
| Material Grades | 96%, 99%, 99.5%, 99.7% Al₂O₃ – high purity for demanding applications |
| Tolerances | Up to ±0.05mm – suitable for precision assemblies |
| Forming Methods | Dry pressing, isostatic pressing, extrusion, casting, injection molding |
| Machining | CNC grinding, ID honing, drilling, slotting, polishing |
| Customization | Drawings, CAD files, or samples accepted for custom parts |
ADCERAX can review common custom OD/ID ranges of 2-120 mm, lengths of 10-3500 mm and wall thicknesses of 0.5-20 mm. Final feasibility depends on tube geometry, straightness, wall thickness, material grade, firing route and working conditions.
Send a drawing or old-part photo, OD, ID, length, wall thickness, bore count, tolerance, material or purity requirement, operating temperature, atmosphere, application, quantity and target country.
ADCERAX can review drawings, sketches, samples or old-part measurements for material, dimensions, tolerance and application fit before quotation. For replacement tubes, send old-part photos, equipment context and failure information; ADCERAX does not claim universal drop-in compatibility.
Choose by application and structure: open-end tubes for passage or furnace work tube discussions, closed-end tubes for thermocouple or sensor protection, single-bore tubes for simple insulation or routing, and multi-bore tubes for separating multiple conductors or sensor channels. Send application, temperature, bore layout, drawing or old-part photo for review.
A single-bore alumina tube has one central passage for insulation, protection or flow-through use. A multi-bore alumina tube has two or more parallel bores for separating conductors, thermocouples or sensor channels. Send bore count, bore diameter, pitch, OD, length and a cross-section drawing for review.
Furnace work tubes are usually open-end tubes selected by OD, ID, length, support span, temperature, atmosphere and heating cycle. Thermocouple protection tubes are usually closed-end tubes selected by insertion length, sensor size, closed-end geometry and working conditions.
Start from temperature, atmosphere, electrical insulation, wear, corrosion and purity requirements. If the grade is not fixed, ADCERAX can discuss material options during RFQ review.
To quote an alumina ceramic tube, please send:
Send what you have — even a drawing or a sample is enough to start. Our engineers review material, tolerance and feasibility before quoting.
*Our team will answer your inquiries within 24 hours.
*Your information will be kept strictly confidential.
info@adcerax.com
Tel.:+(86) 0731-74427743
WhatsApp: +(86) 19311583352
Within 24 hours
The more details you provide, the faster we can respond.
*We respond within 24 hours. All inquiries are confidential.
The more details you provide, the faster we can quote.
*We respond within 24 hours. All inquiries are confidential.
