|
Table1 |
Thermocouple sheath |
Material |
Operating Temp.(¡æ) |
Maximum Temp.(¡æ) |
Features |
Recrystallized Silicon Carbide (RSIC) |
1,650 |
|
Widely used as commom protection tube against heat and corrosion but not recommendable for use in the presence of sulphur or reducing flame. |
Nitride Bonded Silicon Carbide(NSIC) |
1,550 |
1,750 |
Most suitable for use in molten aluminium,reheating. |
Siliconized Silicon Carbide(SISIC) |
|
1,380 |
Recommendable for molten Zinc |
99-99.5% Alumina |
1,600 |
1,800 |
Recommendable for use in molten steel,slag and molten glass,impervious. |
85-95% Alumina |
1,400-1,500 |
1,600-1,700 |
Sintered alumina.Recommendable for use in heating furnace and regenerator,impervious. |
Al 2 O 3 (%) |
£¾ 85 |
£¾ 95 |
99~99.5 |
SiO 2 (% ) |
£¼ 12 |
|
£¼ 0.2 |
Fe 2 O 3 ( %) |
£¼ 0.5 |
|
£¼ 0.05~0.1 |
Use temperature (¡æ) |
1400 |
1500 |
1600 |
Max temperature (¡æ) |
1600 |
1700 |
1800 |
Rigidity |
7 |
|
8~9 |
Bulk density |
3.6 |
3.8 |
3.7~3.9 |
Water absorption |
£¼ 0.2 |
£¼ 0.2 |
£¼ 0.1~0.2 |
Bending strength in high temperature |
|
|
2000kg/cm 2 |
Colour |
white |
Pink or yellow |
yellow-beige |
O.D. |
I.D. |
LENGTH |
6mm |
4mm |
600mm or 1000mm(COE) |
8mm |
5mm |
600mm or 1000mm(COE) |
10mm |
7mm |
600mm or 1000mm(COE) |
12mm |
8mm |
600mm or 1000mm(COE) |
15mm |
11mm |
600mm or 1000mm(COE) |
17mm |
13mm |
600mm or 1000mm(COE) |
20mm |
15mm |
600mm or 1000mm(COE) |
24mm |
18mm |
600mm or 1000mm(COE) |
26mm |
20mm |
600mm or 1000mm(COE) |
OUTER |
INTERNAL |
LENGTH |
HOLES |
3 mm |
1 mm |
50mm |
2 |
4 mm |
1 mm |
50mm |
2 or 4 |
4 mm |
0.6 mm |
50mm |
6 |
6 mm |
2 mm |
50mm |
2 or 4 |
8 mm |
3 mm |
50mm |
2 or 4 |
9mm |
3.5mm |
50mm |
2 |
10 mm |
4 mm |
50mm |
2 |
10.5mm |
3.5mm |
50mm |
4 |
12 mm |
4 mm |
50mm |
2 or 4 |
12 ¡Á 8(OVAL)mm |
4mm |
50mm |
2 |
14mm |
4mm |
50mm |
4 |
|
|
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