Metal hoses used at high temperatures should be calibrated based on the calibration coefficient of their working pressure and temperature at high temperatures, and their additional working pressure should be reduced to ensure their safe use.

The metal hose material is stainless steel, and the reactive anions (such as sulfur and chloride ions) that generally exist in the medium are prone to passivation film on stainless steel. In small corrosion holes of base metals, they are the active centers for pitting corrosion. The surface potential of the corroded hole metal is negative, and the surface potential of the corroded hole metal is external, external, and internal. Under passivation conditions, a micro galvanic corrosion battery is formed in an active state. The battery with a large cathode anode area has a smaller ratio and a smaller anode current structure. NT has a high density and corrodes pores quickly.

Under dynamic working conditions, metal hoses are often damaged by fatigue cracks under cyclic loading effects. This kind of damage is a normal problem. In order to extend the service life, the hose should be properly planned, installed correctly, and free from deformation and other additional stresses.

Water hammer is a pressure transient process caused by sudden changes in the activity of the medium and changes in the momentum of the fluid inside the pipeline. It is a special vibration phenomenon caused by unstable activities inside the pipe. The pressure wave that rises and falls sharply through the pipeline is similar to the noise caused by hitting the pipeline with a hammer.

When water hits, the impact on the curved section of the pipeline is greater. Therefore, users should comply with the requirements of the operating procedures, such as slow heating, stable voltage, instantaneous flow rate and pressure changes during descent, to prevent water shock.