In the industrial automation systems, thermocouple, RTD temperature sensor, as has been widely used, but in some special occasions, such as chemical plants, smelters, thermal power plants, with ordinary thermocouple, RTD on extremely damaged. Therefore, In these cases it is necessary to use thermocouple, RTD special materials and structures.
Currently two kinds of wear resistant coating, a material hardness HRC58-62, temperature range 0-600 ℃; corrosion-resistant type coatings with good corrosion resistance, in addition to molten lithium, potassium, sodium, hydrofluoric acid, tris chlorine trifluoride, oxygen trifluoride high velocity liquid nitrogen, but it can resist almost all other chemical media, long-term use in the range of 0-250 ℃. If you want to make corrosion-resistant structure fixed thread, the thread can not be Working under pressure.
Seawater resistant alloy tube, a variety of chloride and hypochlorite, chlorine and wet oxidizing acid (including fuming nitric acid) and other corrosive alkali, intolerant purer reducing acid (sulfuric acid, hydrochloric acid), titanium tube test temperature range below 500 ℃.