Metal hoses consist of corrugated pipes, wire mesh sleeves, and joints.
The corrugated pipe is the main body of the metal hose, which plays a flexible role, the steel wire mesh sleeve plays a role in pressure bearing and protection, and the joint plays a role in connection.
Bellows are cylindrical thin-walled shells with transverse corrugations that can elongate or contract under axial tension or pressure. If a transverse force is applied to them that generates a bending moment, corresponding displacement can be obtained along the axial plane. Bellows are thin-walled tubes that are welded seamlessly or longitudinally, and are formed by mechanical rolling or hydraulic bending. The entire process should be a continuous process. Bellows can be divided into spiral or annular corrugations according to their shape. Spiral corrugated tubes are formed by the continuous spiral of corrugations with a constant pitch in a right-handed thread, while annular corrugated tubes are composed of many single corrugations with equal spacing. Compared with circular corrugated pipes, spiral corrugated pipes have higher pressure bearing capacity, greater stiffness, and poorer flexibility.
The material of ripple is generally austenitic stainless steel, which has the following characteristics:
1.It can withstand the corrosiveness of internal flow medium and external environment.
2.It can work for a long time at medium temperature and ambient temperature.
3.It has good processing technology (mainly referring to weldability and formability).
The steel wire mesh sleeve is woven from several intersecting strands of metal wires or strips of metal in a certain order at a specified angle, and is fitted onto the outer surface of the metal corrugated pipe.
Wire mesh covers not only share the cost The flexible hose is subjected to static loads in both axial and radial directions, while also ensuring the safe and reliable operation of the metal hose under the pressure generated by fluid flow along the pipeline. At the same time, it can also ensure that the corrugated part of the hose is not directly subjected to mechanical damage such as relative friction and impact.
Therefore, corrugated metal flexible hoses can be manufactured with single-layer, double-layer, or three-layer steel wire mesh sleeves according to different usage conditions. The material of the steel wire mesh sleeve is generally the same as that of the corrugated pipe, or it can be made of different materials, mainly considering anti-corrosion and economy.
A joint is a component that connects a metal hose to other fittings and equipment, ensuring the normal operation of the medium in the pipeline system.
There can be various forms of joints, generally divided into four categories: threaded connections, flange connections, quick insert connections, and welded connections.
