The thermometer casing failure cause analysis

Thermometer casing is isolated process medium, is advantageous for the protection and repair of a thermometer thermometer accessories. By analyzing to classify a thermometer casing failure reason, roughly: ( 1) Thermometer casing is impacted by the high velocity, load too much negative, stress over limit; ( 2) Thermometer casing processing defects itself, leading to stress concentration, easy to cause fracture; ( 3) Pipeline vibration, the thermometer casing fatigue damage; ( 4) When the fluid flows through the thermometer casing, induce thermometer casing vibration, namely the thermometer casing vortex shedding frequencies and fluid resonance frequency. The resonance phenomenon causes the thermometer casing damage faster, so that the fracture. In practice, often find the same batch, the same size, same insert depth of thermometer casing, a root may run 6 ~ 10 years or longer will not damage, while another may broken accident happened in a short time.