Performance of Silicon Carbide Thermocouple Protection Tube
- Long-term use temperature can reach 1600℃.
- Withstand rapid and extreme temperature fluctuations.
- Resistant to molten metal, strong acid and alkaline corrosion.
- Fast thermal conductivity and high precision.
- High mechanical strength and long service life.
- Resistant to abrasion from particulate matter or flowing media.
Silicon Carbide Thermocouple Protection Tube with Various Types
According to different application environments and operating temperatures, we recommend different materials of protective tubes to customers.
Overall balance of properties, providing a cost-effective solution for a wide range of applications.
Suitable for temperature measurement of molten metals such as aluminum, copper, and zinc.
Exceptional high-temperature strength and superior resistance to corrosion.
Different Types of Silicon Carbide Thermocouple Protection Tube
Straight tube typeStandard single-layer tube, suitable for most industrial furnaces.
Special-shaped pipeCustomized end (threaded, flange connection) to meet the installation requirements of special equipment.
One-piece with thermocouple sleevePre-buried K-type/S-type thermocouple, reducing on-site installation errors and fast response.
Why Choose Newthink Silicon Carbide Thermocouple Protection Pipe?
Choose Newthink because we can provide high-performance, high-flexibility, and cost-effective silicon carbide protection tubes, while solving customers’ supply chain stability and after-sales concerns.
Customizable special-shaped structures, composite coatings, and diversified sizes.
Raw material cost advantage, localized production, and lower prices than European and American counterparts.
ISO certified, strictly control each process to ensure stable and reliable product quality.
Own factory, support small batch orders.
Large-sized silicon carbide panels use plywood boxes, containing foam boards and filling pads.
Professional international sales team, experienced and timely response.
Custom SiC Thermocouple Protection Tube
The size of the silicon carbide thermocouple protection tube needs to be customized according to the thermocouple type and industrial furnace structure:
- Small-diameter type (suitable for precision temperature measurement):
Outer diameter: 6mm, 8mm, 10mm
Wall thickness: 1.5mm~2.5mm (can be thickened to 3mm for high mechanical strength requirements) - Standard type (general industrial scene):
Outer diameter: 12mm, 15mm, 18mm, 20mm
Wall thickness: 2mm~4mm (corrosion-resistant/anti-scouring design) - Large-diameter type (high load or composite sleeve):
Outer diameter: 25mm, 30mm, 40mm
Wall thickness: 4mm~6mm (suitable for metallurgical molten steel temperature measurement) - Length (L): 300-1800mm
Meet Us at Exhibitions and Factory Visits
Newthink actively participates in major industrial and advanced ceramics exhibitions worldwide throughout the year, such as Italy, Germany, Japan, and Vietnam, meeting directly with our customers.
Our doors are always open—you’re warmly invited to visit our factory, witnessing firsthand our dedication to quality. Through frequent interactions and strong relationships built at these global events and visits, we’ve earned deep trust from clients in over 40 countries and regions.
Parameters for Different Types of Silicon Carbide Thermocouple Protection Pipe
In order to adapt to different application scenarios, we provide silicon carbide thermocouple protection tubes made of the following materials.
- Data Sheet
Item | Unit | Data | |||
| RBSiC(SiSiC) | NBSiC | SSiC | RSiC | ||
| Max service temperature | ℃ | 1380 | 1450 | 1650 | 1620 |
| Density | g/cm3 | 3.02 | 2.75-2.85 | 3.08-3.16 | 2.65-2.75 |
| Open porosity | % | 0 | 13-15 | 0 | 15-18 |
| Bending strength 20℃ | Mpa | 250 | 160 | 380 | 100 |
| Bending strength 1200℃ | Mpa | 280 | 180 | 400 | 120 |
| Modulus of elasticity 20℃ | Gpa | 330 | 580 | 420 | 240 |
| Modulus of elasticity 1200℃ | Gpa | 300 | / | / | 200 |
| Thermal conductivity 1200℃ | W/m.k | 45 | 19.6 | 100-120 | 36.6 |
| Coefficient of thermal expansion | K-lx10-6 | 4.5 | 4.7 | 4.1 | 4.69 |
| HV | kg/mm2 | 2115 | / | 2800 | / |
Related Products
High temperature resistance and strong thermal shock resistance, suitable for extremely harsh environments.
Alumina Protection TubeHigh purity and corrosion resistance, suitable for high temperature oxidizing atmosphere.
Thermocouple Protection TubeDesigned specifically for thermocouples to ensure accurate and durable temperature measurement.
Protection TubeUniversal protective housing to protect internal components from high temperature and chemical corrosion.
① Protective tubes must be used: Insulate the thermocouple with high temperature and corrosion resistant materials such as silicon carbide ceramic protective tubes and protect from the hostile media.
② Mechanical damage must be avoided: Avoid areas which can experience vibration or shock when installed.
Thermocouple protection tubes are typically made of high temperature resistant material and corrosion resistant material, such as metal or ceramic (silicon carbide). The material is selected depending on operating temperature and the environment.
① Thermocouple sleeves are usually independently installed metal hollow tubes, which are fixed on equipment by threading or flanges, and are mainly used to seal high-speed and high-pressure liquids, and to plug and replace thermocouples
② The protective tube is comprised mostly of ceramic materials like silicon carbide, which is sleeved directly on the outside of the thermocouple. It predominantly serves as high temperature resistance, corrosion resistance, and protection of mechanics, and is usually applied in extreme environments like furnaces and heat treatment.
Briefly, the sleeve is focused on the convenience of engineering installation and maintenance, while the protective tube is focused on direct protection.
① Acid resistance: Excellent (resistance to non-oxidizing acids such as hydrochloric acid and sulfuric acid);
② Alkali resistance: Poor (readily corroded by strong alkalis such as NaOH and KOH at high temperatures).
