Flexible Metal Conduit
Metal Conduit
Zhejiang Flexible Technology Co., Ltd.
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What are the main factors determining the corrosion resistance of Flexible Metal Conduits?

Oct. 30, 2019

  As a Flexible Conduit Factory, there is some information to share with you.

  Pipe installation stress

  In complex piping systems, there are often difficulties due to space position conditions, resulting in installation difficulties: the formed pipe can not be loaded; bending over, coming over, making up the installed pipe will inevitably produce local Cold correction. Depending on the pipe diameter and the specific conditions on site, the amount of cold correction ranges from a few millimeters to tens of millimeters, and some hundreds of millimeters. Practice has proved that the larger the amount, the higher the internal stress, and the installation stress of these residues in the pipeline system is undoubtedly extremely invisible.

  A section of the bearing lubricant pipe in a certain type of engine has many fracture accidents in actual operation, which is caused by excessive installation stress.

  Because it can be bent at will and the internal stress generated by bending under the rated bending radius is very small, it can bring great convenience to the installation work and also guarantee the safe operation of the pipeline system. This is the main reason why certain piping systems must use Flexible Metal Conduits.

Flexible Metal Conduits

Flexible Metal Conduits

  Compensation pipe position

  Due to the need to load and unload the mold, the movable cylinder on the vulcanizer will move in the upward and downward directions. After the copper serpentine tube reciprocates many times, fatigue fracture occurs, although it can be used after repair, but the parking repair will cause time loss. Although the rubber tube has good softness and strong anti-fatigue ability, it is also a weak link in terms of pressure, temperature resistance and anti-aging. It can not be continued after several months of use. The good overall performance of the metal hose is fully reflected here. In the general industrial field, in addition to pressure and temperature, there are often harsh conditions such as fatigue, corrosion, vibration, pressure, impact, etc. Under such circumstances, it is most suitable to compensate the positional movement of the pipeline. It’s gone.

  Absorbing vibration

  In a giant building, the air conditioning in the hall is provided by a 6FWB unit fixed in the basement. The vibration of the unit passes through the bridge connecting the pipe and is transmitted to the ground hall, with a noise value of 45dB. In such an environment, people always feel a sense of discomfort. After the design is improved, the metal hose is connected in series on the connecting pipe, which not only absorbs some of the noise generated by the vibration of the unit, but also the noise generated by the fluid pulsation in the pipe system is absorbed. At this time, the noise in the ground hall The value is only 33dB, which greatly improves the environment inside the hall.

  The corrosion resistance of Flexible Stainless Steel Conduitdepends on the content of chromium. When the amount of chromium added is 10.5%, the atmospheric corrosion resistance of steel is significantly increased, but when the chromium content is higher, although the corrosion resistance can be improved, But not obvious. The reason is that when chromium is used to alloy steel, the type of surface oxide is changed to a surface oxide similar to that formed on pure chromium metal. This tightly adhering chromium-rich oxide protects the surface from further oxidation. This oxide layer is extremely thin, through which you can see the natural luster of the stainless steel surface, giving the stainless steel a unique surface. Moreover, if the surface layer is damaged, the exposed steel surface will react with the atmosphere to repair itself, and the "passivation film" is reformed to continue the protection.