Alumina Ceramic Tube for Insulation, Alumina Insulation Tube

• Material: Ceramics
• Function: Thermal Insulation
• Making Method: Machine Made
• Transport Package: Wooden Cases with Protective Material Inside
• Specification: as to customer′s request
• Trademark: SHIBO
• Model NO.: SHIBO-alumina tube
• Origin: China
• HS Code: 85471000
• Production Capacity: 100000PCS/Month

Product Description

Alumina insulation tube
Our company mainly supply alumina ceramic products, especially thermocouple protection tube, insulation tube, furnace tube type.  Due to different use temperature, it is divided into 99.7 porcelain(corundum), 99 porcelain (corundum), 95% porcelain (corundum), 85 porcelain (high aluminumi), 75 porcelain (mullite), chemical porcelain (40 aluminum), the above material which is the more content of alumina, the higher temperature can reach, the highest aluminum content of vertical use temperature 1710 degrees Celsius, and minimum of aluminum content of 1100 degrees Celsius.

Size of alumina insulation tube:

Shape	Round with Single hole								Round with double holes
OD	1	1.5	2	3	4	5	6	8	1	1.6	2	3
ID	0.5	0.6	1	2	2	3	4	5	0.2	0.3	0.5	0.7
Length	10~1600

 

Shape	Round with double holes					Round with four holes
OD	4	5	6	8	12	1.6	2.5	3	4	6	8	10	12
ID	1	1.2	1.5	2	4	0.35	0.5	0.5	0.8	1.5	2	2	3.5
Length	10~1600

Main performance

number	performance	unit		High corundum	corundum	High aluminum
1	Al2O3content	%		99.7	99.35	85
2	SiO2content	%		<0.1	-	-
3	density	g/cm^3		3.95	3.88	3.4
4	Water absorption	%		0	0.01	0.2
5	Pressure at normal temperature	MPa		450	350	200
6	20ºC leak rate	Torr/L.sec		<10^-11	<10^-11	<10^-11
7	High temperature bending	mm		1700ºC allowed 0.2	1600ºC allowed 0.2	1400ºC allowed 0.2
8	High temperature adhesive			1700ºC         no adhesive	1600ºC        no adhesive	1400ºC         no adhesive
9	20-1000ºC the coefficient of thermal expansion	mm10^-6/ºC.m		8.6	8.2	8.2
10	Thermal conductivity	W/m.R		35	34	17
11	Electrical insulation strength	KV/mm		20	20	15
12	20ºC direct insulation resistance	Ohm/cm		10^14	10^14	10^14
13	High temperature insulation resistance	1000ºC MΩ		≥0.08	≥0.08	≥0.08
		1300ºC MΩ		≥0.02	≥0.02	≥0.02
14	Thermal shock resistance			1550ºC 6 times  no crack	1550ºC 6 times no crack	1300ºC 3 times  no crack
15	Max working temperature	ºC		1800	1750	1350
16	Suggested working temperature	ºC	1650-1700		1600-1650	1290
17	Mohs hardness		9		9	4.5
18	Refractoriness		2040		2030	1850

 
Application:
 
As thermocouple protection tube, it is widely used in high-grade measuring device, also it is used in solar industry, chemical industry and variouls heat treatment process and equipment, scientific analysis instruments.

Photos of our factory

Why choose SHIBO?
1) leading producer, more than 20 years producing experience
2) factory direct sales, low price in the market
3) the whole production line from powder to finished products, top and steady quality assured
4)fast delivery and best sale service