Metal hose is an important connecting component in engineering technology, which is composed of corrugated flexible pipe, net sleeve and joint.

As compensation element, sealing element, connecting element and shock absorber in various gas and liquid pipeline systems, as well as length, temperature, position and angle compensation system, it has been applied in aerospace, petrochemical industry, mine electronics, mechanical shipbuilding, medical and health, textile electronics, energy construction and other fields.

The structure of corrugated metal hose shows that the material of metal corrugated pipe is strip and pipe for two minutes. They can form annular corrugated pipe and spiral corrugated pipe. Only because the bellows formed by strip always have some length of brazing or welding laps and joints, these places often accumulate the residue of working media, and precipitate cleaning tests and mechanical impurities in working media to contaminate the inner cavity. Therefore, the reliability of its use is relatively poor. Ring bellows are tubes of special geometry whose outer edges of some annular diaphragms are tangent to some concave semi-circles facing the center and whose inner edges are tangent to some semi-circles of concave vest. Its billet is mainly made of pipes. This kind of bellows has the characteristics of large flexibility, good elasticity, simple manufacture and small rigidity. Suitable for making large and medium-sized metal hoses that can withstand general working pressure and require high flexibility. Helical bellows are tubes with special geometric shapes, in which the outer edge of a reed-shaped diaphragm is tangent to a reed-shaped concave semi-circular ring facing the center and the inner edge is tangent to a semi-circular ring of a reed-shaped concave vest. This kind of bellows has the characteristics of high strength, high rigidity and simple manufacture. It is suitable for making metal hoses with high, medium pressure, medium and small diameter, which require general flexibility and high strength.

The corrugated metal hose is mainly composed of corrugated pipe, net sleeve and joint. Bellows are the body of metal hoses, playing a flexible role; net sleeves play a role of strengthening and shielding; joints play a role of connecting. For different use requirements, they are connected in different ways: bellows, mesh sleeves and joints are joined by welding, called welding; mechanical clamping, called mechanical clamping; in addition, there is a combination of the two methods, called hybrid.