Tighter tolerances. Higher temperatures. Better precision control. If you manufacture MI cables for thermocouples, you’ve probably seen a rise in
demand for precision and reliability to meet tougher safety requirements for temperature, control and measurement engineering. Your choice of tube
material for the protective tube sheath will be critical – especially in corrosive environments and at elevated temperatures.
Whether for thermocouples, measurement, or heating, MI tubing is exposed to corrosive gases or liquid metals at high temperatures without cooling. Metal cladding is thus essential to protecting thermocouple wires from corrosion. Replacing the tubes can be time-consuming or dangerous since they’re often located in high-temperature zones or difficult-to-reach areas. To resist corrosion and creep and to secure structural stability, we provide a wide range of sheath materials to suit the insulation material being used.
If your MI tube is exposed to sulfurous atmospheres or comes into contact with molten copper or brass at temperatures up to 1,125°C, Alleima® 4C54 is an ideal material. If the cable is used for cracked ammonia (NH3) and hydrogen (H2) up to 1,100°C, Sanicro® 31HT is a good all-round tube.
Alleima® 7RE10 (TP 310H) also provides good protection against oxidation at temperatures up to 1,170°C (or Sanicro® 61 for higher temperatures). Alleima 253 MA offers the best anti-oxidation performance in temperatures up to 1,150°C and can often replace TP 310H. When carburization is a factor, or in atmospheres fluctuating between oxidizing and reduction processes, we suggest Alleima® 353 MA.