Flexible Metal Conduit
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What Working Conditions and Environments Should be Paid Attention to for Flexible Metal Conduits?

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

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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