ceramic protection tube is a ceramic protection tube used to protect sensing elements or temperature measurement elements in high-temperature and harsh-duty conditions. It is commonly found in metallurgy, industrial furnaces, glass production, heat treatment, and process control equipment, where it is used for the isolation, protection, and heat-resistant enclosure of thermocouples, RTDs, and other temperature-sensing elements. It helps prevent easy damage, unstable measurement, and frequent replacement when sensing elements are directly exposed to high temperature, corrosive atmospheres, fluid erosion, or mechanical impact.
Specifications
|
Parameter |
Value |
|
Material |
Alumina ceramic |
|
Alumina Content |
96%-99.7% |
|
Structure |
Hollow protection tube |
|
Density |
3.75-3.95 g/cm³ |
|
Hardness |
12-14 GPa |
|
Dielectric Strength |
9-11 kV/mm |
|
Volume Resistivity |
>10¹⁴ Ω·cm |
|
Thermal Conductivity |
25-33 W/m·K |
|
Service Temperature |
1600-1700°C |
Key Features
- High-temperature resistance
- Chemical corrosion resistance
- Electrical insulation
- High mechanical strength
- Thermal shock resistance
Applications:
- Thermocouple protection tubes
- Resistance thermometer protection tubes
- Protection sleeves for temperature control devices
- Protection tubes for high-temperature process measurement
- Protection tubes for temperature measurement in chemical media
- Protection tubes for temperature measurement in light-metal melts
Packaging & Shipping
Layered and separated packaging is used, with special protection for the closed end, tube opening, end faces, and long tube body. This helps prevent closed-end damage, opening cracks, and body breakage caused by end impact, stacking compression, or uneven stress on long tubes during transportation. Products are packed by length and specification, and long-size products can be shipped in reinforced outer cartons or wooden cases.
Customization Capability
Customization is supported according to different lengths, opening types, and application requirements. Development can be matched to different installation positions and protection structures.
Quality Control
Production is carried out according to drawings and the required outer diameter, inner diameter, length, and wall thickness. Under the ISO9001 quality management system, raw material batches, first-article approval, in-process sampling inspection, finished product inspection, and pre-shipment reinspection are all controlled. Inspections cover outer diameter, inner diameter, length, wall thickness, straightness, opening integrity, as well as cracks and surface defects.
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