MS type high temperature anti-corrosion protection tube - Special protection tube - Temperature Measurement - Chongqing Instrument Materials Research Institute

The common limit temperature of stainless steel protection tube about 900 ℃; the use temperature of the non-metallic type corundum tube and high-aluminum tube is high, thermal shock-resistant is not satisfactory and air-tightness is easy to friable, scope of use are subject to certain restrictions. The developed corrosion-resistant, heat-resistant alloy protection tube series products can be used for special occasions, especially complex chemical production sector, while also for a number of large complete sets of equipment.

● Features
MS type thermocouple protection tube is a metal ceramic product refractory metal compound molybdenum disilicide matrix, which overcome Al2O3 protection tube disadvantages in thermal shock-resistant, air-tightness and mechanical; has characteristics of high temperature anti-corrosion, anti-oxidation, anti-air erosion, thermal stability and no phase change etc.; suitable for the oxidation, reduction, oxidation-reduction, neutral atmosphere, chemical corrosive gases and molten metal. This product has been widely used for temperature measurement in natural gas, fertilizer, metallurgy, refractory, ceramics, cement, petrochemical, coal chemical, carbon black, machinery and other industries with good effect.

● Heat-resistant and corrosion

Media	Atmosphere	CO2、SO2、NO2、N2、NO	Inert gas and CO	Wet hydrogen	dry hydrogen	NH3 （H2≤8％）	Cu、Al、 Sn、Pb	Ni
Ultimate-use temperature ℃	1600	1600	1500	1450	1350	1400	1000	1500
Medium	Zn	NaCl+BaCl2	NaCl+KCl+FeCl3	NaOH、K2CO3		thermal shock-resistant
Ultimate-use temperature ℃	940	1050	950	Not use		0℃ 1500 ℃ repeated cycle of 10 times not crack

● Size specifications and Tolerance

Prdouct code	Specifications and tolerance mm
MS	Outer diameter	Tolerance	Inner diameter	Tolerance	Length	Tolerance
	16	±1	9	±2	500~1000	±2
	18	±1	10	±2	500~1000	±2
	20	±1	12	±2	500~1000	±2
	22	±1	14	±2	500~900	±2
	25	±1	17	±2	500~1000	±2
	28	±1	20	±2	500~900	±2
	32	±1	22	±2	500~900	±2
Note: 1. the product hard and brittle, the process in transportation, installation and use should be to prevent the impact, touch and vibration; 2. vertical installation, particularly the use temperature>1300℃; 3. the product has a certain conductivity, the working end should be set corundum tube to prevent short circuits when thermocouple assembly.
Standard：Q／YCS73－1998（supply agreement for specifications not mentioned ）