Oct. 22, 2019
As a Flexible Conduit Factory, there is some information
to share with you. Although metal hoses can be stretched and stretched, they can
break quickly and reduce their service life if they are not installed in the
correct position. The hose can be installed horizontally or vertically or
diagonally. Ideally, it should be installed vertically, and should be installed
near the wheel. If necessary, a baffle can be added.
Flexible Metal Conduit
The Flexible Metal Conduit can generally be divided into
three lengths: the first is the compression length, which is the length when the
hose is compressed to a defined position; the second is the installation length,
which is halfway between the defined displacements. The length of the hose; the
third is the stretched length and the hose is stretched to a defined length.
When installing the hose, the hose should be in the middle position, the
so-called installation length. In this position, the hose can have two moving
directions when subjected to axial load. Otherwise, if it can only move in one
direction, it will affect the strength of the metal hose and reduce the service
life.
In the actual installation process, considering the use of the ruler to
calculate the length of the hose and then installing it may affect the
production efficiency. Some manufacturers install the ruler directly on the
hose, and cut off the ruler after installation.
1. When selecting a metal hose, please use a metal hose with a loose flange
at one end for easy installation.
2. The surface of the metal hose should be protected during the welding
work at the construction site to prevent welding slag and arc ignition from
burning the metal hose.
3. It is strictly forbidden to twist the metal hose.
4. It should not be bent along the root of the metal hose, and there should
be no dead bends.
5. The medium to be passed shall not be corrosive to the material of the
bellows. The chloride ion content in the medium shall be ≤25PPM.
6. Strict installation and installation of the correct installation
method.
7. It is strictly forbidden to mechanically damage the flange sealing
surface.
The structural form of the Metallic Conduits connection is
roughly divided into a spiral type and a flange type:
1. Thread type: The joint of metal hose with a diameter of less than 50 mm
is mainly threaded when subjected to high working pressure. After tightening the
thread, the inner and outer taper faces on the two joints Close cooperation to
achieve sealing. The cone angle is generally 60 degrees and is also useful for
74 degrees. The structure is well sealed, but it is necessary to ensure the
concentricity of the two docking parts during installation. In order to solve
the problems of repeated disassembly, assembly and difficulty in concentricity
often seen in actual engineering, the joint can also be designed as a
combination of a tapered surface and a ball head.
2. Flange type: The joint of the metal hose with a diameter of 25 mm or
more is mainly flanged under the condition of normal working pressure, and it is
sealed in the form of a gutter. The looper flange, which can be rotated in the
radial direction or in the axial direction, is connected to the two bodies by
the tension of the fastening bolt. The structure has good sealing performance,
but the processing is difficult, and the sealing surface is easily damaged. In
the case where quick unloading is required, the hole through which the fastening
bolt passes can be cut out to form a quick release flange.
