Although metal hoses can be compressed and stretched, if they are not installed in the correct method, they will break quickly and reduce service life. The hose can be installed horizontally, vertically or obliquely. The most ideal state is vertical installation. At the same time, it should be avoided to be installed near the wheels. If necessary, a baffle can be installed.
Generally, metal hoses can be divided into three lengths: the first is the compression length, that is, the length when the hose is compressed to the limit position; the second is the installation length, which is the length of the hose when it is in the middle position of half of the maximum displacement; the third is the stretch length, the length of the hose when it is stretched to the maximum limit. When installing the hose, the hose should be in the middle position, which is the so-called installation length. When installed in this position, the hose can have two moving directions when it is subjected to an axial load. Otherwise, if it can only move in one direction, it will affect the strength of the metal hose and reduce its service life. In the actual installation process, considering that using a ruler to measure the length of the hose according to the calculation result and then installing it may affect the production efficiency, some manufacturers install the ruler directly on the hose, and cut the ruler off after installation.
From the structural point of view, metal hose has two kinds of blank materials: strip and pipe, which can be formed into annular metal hose and spiral metal hose. The annular metal hose is a special geometric shape tube in which the outer edges of several annular diaphragms are tangentially connected to several concave concentric semi-circles, and the inner edges are tangentially connected to several semi-circles of concave vests. This type of metal hose has the characteristics of high flexibility, good elasticity, simple manufacture and low rigidity. It is suitable for making large and medium diameter metal hoses that can withstand general working pressure and require high flexibility. The helical metal hose is a special geometrically shaped tubes that the outer edges of the spring-shaped diaphragm of a certain length are tangentially connected to the concave concentric semi-circle around the spring, and the inner edges are tangentially connected to the semi-circle of the spring-shaped concave vest. This type of corrugated pipe has the characteristics of high strength, high rigidity and simple manufacturing. It is suitable for making high and medium pressure, medium and small diameter metal hoses that require general flexibility and high strength.
