Alumina Ceramic Thermocouple Protection Tubes

• Feature: Long Time Materials
• Refractoriness (℃): 1770< Refractoriness< 2000
• Shape: Pipe
• Model NO.: 50/40mm x 1000mm
• Type: Heat-Resistant Material
• Material: Alumina Ceramic
• Transport Package: Wooden Box
• Specification: 10-170
• Trademark: QIJING
• Origin: Shandong
• HS Code: 6903900000
• Production Capacity: 50000

Product Description

    Qijing industrial ceramics are widely used in power, coal, metallurgy, chemical industry and other industries. As an abrasive material and corrosive medium.

     Alumina ceramic thermocouple protection tube .Thermocouple temperature measuring instrument is a commonly used temperature measuring element in industrial production. Among them, the key core parts are temperature measuring heating wire and insulating protective sleeve. Alumina ceramic insulating protective sleeve has good thermal conductivity and high temperature resistance. It is widely used in the production of thermocouples. It plays a key role in protecting the temperature measurement and thermal conductivity wires and increases the service life of thermocouples. The corundum protective sleeve has a sealed round head shape at one end and good compactness. It is generally used in conjunction with an insulating core to form an important temperature measuring element of a thermocouple
protection tube.





 
Our tubes can work as high temperature tubes.

According to temperature difference we uaually provide 95% alumina tubes and 99.7% alumina tubes for this usage

MAX working temperature: 95% alumina tube, 1550C;
99.7% alumina tubes, 1700C.
 
Two types: two ends open and one end closed

Standard sizes:
50/40mm x 1000mm
60/50mm x 1000mm
80/70mm x 1000mm
90/80mm x 1000mm
100/90mm x 1000mm.


>>>Physical Property:

Material		Alumina Content
Characteristic	Unit	AL99.7	AL99.5	AL99	AL95
Content		99.7%	99.5%	99%	95%
Color		Ivory white	Ivory white	Ivory white	Ivory white,
Density	g/cm	3.94	3.9	3.8	3.75
Straightness		2‰	2‰	2‰	2‰
Hardness	Mohs hardness	9	9	9	8.8
Water absorption		<=0.2	<=0.2	<=0.2	<=0.2
Flexural strength	(20ºC) Mpa	375	370	340	304
Compressive strength	(20ºC) Mpa	2300	2300	2210	1910
Thermal expansion coefficient	10/ºC	7.6	7.6	7.6	7.6
Dielectric strength	AC.kv/mn	10	10	10	10
Dielectric loss	<0.0001	<0.0001	0.0006	0.0004	0.001
Volume resistivity    (20ºC)    (300ºC)	Ω.cm3	>1014 2*1012	>1014 2*1012	>1014 4*1011	>1014 2*1011
Dielectric constant	25ºC@1HM	9.8	9.7	9.5	9.2
Thermal conductivity	W/m.k	35	35	34	20
Long-term use temperature	ºC	1700	1650	1600	1400

>>>SIze :
 

OD*ID (mm)	Model & length	OD*ID (mm)	Model & length	OD*ID (mm)	Model & length
2*1	Al2O3 99.5%  <=1500 mm	10*7	Al2O3 95% / Al2O3 99%/ Al2O3 99.5% <=2500 mm	19.05*14.3	Al2O3 95% / Al2O3 99%/ Al2O3 99.5% <=2500 mm
3*2		11.13*7.95		20*15
4*2.5		12*8		22.23*15.88
5*3		12.7*8.9		23.83*17.48
6.35*3.96	Al2O3 95% / Al2O3 99%/ Al2O3 99.5% <=2500 mm	14*10		25.4*19.05
7.95*4.78		15*10		26*20
8*5.5		15*11		28*22
9.53*6.35		16*12		30*23
10*6		17.48*12.7

 


Transport and installation precautions:

Matters needing attention for transportation and installation of ceramic pipe
1. The ceramic composite pipe has high hardness and good toughness, but it should be put gently in the process of transportation and installation to avoid serious collision, especially to avoid direct contact with metal instruments or impact on the ceramic layer on the end surface.

2. The qijing  bending pipe is installed with directivity. When the bending pipe is installed, the direction indicated by the arrow on the surface of the bending pipe should be consistent with the flow direction of the conveying medium.

3. When installing the pipe, the pipe should be aligned with the center line and level should be adjusted to make sure that both ends meet accurately.The displacement of both ends should be controlled within 1.0mm.

4. When the flexible pipe joint is used to connect and install the pipe, the inserted lengths of both ends of the flexible pipe joint shall be adjusted symmetrically.Since the thermal expansion coefficient of the composite pipe is about 1/3 of that of steel, the expansion clearance can be reduced by 3-5mm.

5. When using flange connection, the flange end shall be flush with the end of the composite pipe.

6. Due to the excellent welding performance of the composite pipe, the pipe connection can be conducted by welding. However, when welding, 45o-60o "V" type slope Angle is 2-4mm and gap is 0.8-1.2mm.





PACKING





FAQ:
Q: Are you trading company or manufacturer ?
A: We are factory.

Q: How long is your delivery time?
A: Generally it is 15 days if the mould sizes are in stock. or it is 25 days if the mould sizes are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the stock sample for free charge but do not pay the cost of freight.

Q: What is your terms of payment ?
A: For new customers, 100% T/T in advance. For  regular customers, 30% T/T in advance ,balance after received the B/L copy