Oct. 22, 2020
As a Flexible Metal Conduit Braiding Supplier, share it with you.
1. Corrosion
The flexible metal conduit is generally made of stainless steel. The active
anions in the medium (such as chloride and sulfide ions) can easily damage the
passive film of stainless steel, and small corrosion holes appear on the base
metal, which are the active centers generated by pitting corrosion. The surface
potential of the metal inside the etch hole is relatively negative, and the
surface potential of the metal outside the etch hole is relatively positive, so
the inside and outside of the hole constitute an active-passive micro-galvanic
corrosion battery. The battery has a large cathode and small anode area ratio
structure. The current density is very large, and the corrosion hole deepens
quickly.
Flexible Metal Conduit Low Fire Hazard EU
2. Temperature
For flexible metal conduit s used at high temperatures, the working pressure
temperature correction coefficient of the Flexible metal conduit s at high
temperatures must be reduced to reduce their rated working pressure to ensure
safe use.
3. Fatigue failure
Under dynamic working conditions, flexible metal conduit s are often subject
to fatigue cracks under cyclic loading. Such damage is a normal failure. In
order to prolong the service life, it is necessary to ensure that the hose is
designed and selected correctly, the installation is accurate, and does not
cause additional stress such as twisting of the conduit.
4. Water hammer phenomenon
Water hammer phenomenon is a pressure transient process caused by the sudden
change of the medium flow state and the change of the fluid momentum in the
pipe. It is a special oscillation phenomenon caused by the unstable flow in the
pipe. When the rapidly rising and falling pressure wave is transmitted through
the pipeline, it will produce a kind of noise as if hitting the pipeline with a
hammer, so it is also called water hammer two blade one. When the water hammer
occurs, the impact force on the elbow section of the pipeline becomes stronger.
Therefore, the user should follow the requirements of the operating regulations,
such as slow heating, steady pressure, reduce the amount of instantaneous flow
and pressure changes, and avoid water hammer.
5. Conveying medium
If the conveying medium in the hose has chemical properties and is prone to electrochemical reactions, the material of each part
of the hose should be reasonably selected according to the corrosion resistance
parameter table of the hose material.
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