Chongqing Duchina Temperature Instrument Co., Ltd.
Main products:Single Core Armor Thermocouple,Temperature Sensors For Heat Meters,Atmosphere Extension Wire,Bimetal Thermometer,Thermal Resistance
Products
Contact Us
  • Contact Person : Ms. HU Emily
  • Company Name : Chongqing Duchina Temperature Instrument Co., Ltd.
  • Tel : 86-23-68215733
  • Fax : 86-23-68219865
  • Address : Chongqing,Beibei,290 Fengshixing Road
  • Country/Region : China
  • Zip : 400711

one end closed Ceramic Round Single Bore Alumina Tubes

one end closed Ceramic Round Single Bore Alumina Tubes
Product Detailed
1.Super purity 2.Resistance to chemical corrosion 3.Good airproof capability 4.Good grind-resist capability

1. Product details

 

Alumina Protection ceramic Tubes

Maximum temperature range 3200F

Fair shock resistance, preheating recommended

Resists chemicals, will not contaminate platinum

Impervious to gasses at high temperature

Design

Unglazed. Admissible tolerance of the wall thickness is in compliance with DIN 40680 Part 1, 

degree of accuracy: Fine, with the following specifications: A straight rod, diameter 0.8 

x (d1-2s), must be able to be inserted to the bottom of the sheath tube. The rounded bottom of the 

sheath tube uniformly becomes the cylindrical section of the sheath tube.

Thermal shock resistance: 

The sheath tube is inserted with the closed end into a 40 mm internal diameter tube furnace at constant

rate.The furnace is heated to the maximum permissible continuous temperature of the sheath tube. 

The sheath tube must not come in contact with the tube furnace, therefore a vertical setup of the tube 

furnaceis recommended. After a minimum of 20 minutes holding time, the sheath tube is removed at 

the same rate and is hung freely in order to cool in calm air.

 

Dimensional stability

The sheath tube is horizontally clamped into the tube furnace used for thermal shock resistance testing 

and is then heated to themaximum permissible continuous temperature. This procedure lasts for 30 

minutes.

 

Gas tightness

The sheath tube is exposed to an inner overpressure of 2 bar, and then submersed in water for one 

minute. Note, The tests should be conducted in the above mentioned order. The thermal shock resistance tests and 

dimensional stability tests can be conducted simultaneously .

 



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