Metal hoses are important connecting components in engineering skills, composed of corrugated flexible pipes, mesh sleeves, and joints. As compensation elements, sealing elements, connecting elements, and shock-absorbing elements in various gas and infusion pipeline systems, as well as length, temperature, orientation, and viewpoint compensation systems, it is used in various fields such as aerospace, petrochemicals, mining electronics, machinery and shipbuilding, medical and health, light textile electronics, and power construction. The latest national standard for metal hoses is the General Technical Conditions for Corrugated Metal Hoses.


The metal hose is made of austenitic stainless steel materials or according to user requirements. It has excellent flexibility, corrosion resistance, high temperature resistance (-235 ¡æ~+450 ¡æ), and high pressure resistance (up to 32MPa). It can be connected in any direction in the pipeline to compensate for temperature and absorb oscillations, reduce noise, change the direction of medium transportation, eliminate mechanical displacement between pipelines or between pipelines and equipment, etc. The double flange metal corrugated hose is particularly suitable for flexible joints of various pumps, valves, etc. with displacement and oscillation.

The history of skill research on corrugated metal hoses. Since the Germans created and produced the first corrugated metal hose in the world, after more than a hundred years of development, metal hoses have been widely used in industrial sectors such as aviation, aerospace, nuclear energy, shipbuilding, and modern construction industry due to their reliable sealing, pressure resistance, high and low temperature resistance, corrosion resistance, and flexibility. They have become essential components in modern pipeline systems. With the rapid development of modern industry, the use of metal hoses is becoming increasingly widespread, and the requirements for metal hoses are also advancing. The discussion of metal hose skills is bound to deepen, and the development of metal hoses can be roughly divided into the following stages.

At the beginning, people used animal skins to sew together a tubular structure to adapt to the needs of production struggles. After a relatively long period of time, by the end of the 1970s, the Dutch brothers Van der Gaygin made longitudinally stitched canvas hoses, which were widely used in firefighting affairs at that time. Later, with the emergence of rubber in the world market and the development of its vulcanization process, rubber hoses and hoses made of fabrics such as metal wire or hemp rope were introduced. However, in engineering, some high-temperature media such as steam and hot air; Low temperature media such as liquid hydrogen, liquid oxygen, and liquid helium; Corrosive media such as gasoline, kerosene, acid, alkali, etc., cannot be transported using rubber hoses. Especially under high temperature conditions, its safety and reliability are even more difficult to ensure.

Therefore, people gradually focus their attention on the metal tube, which has several shapes that cause corresponding ripples on its surface, inside, and outside. In this way, it not only has the same flexibility as the rubber hose, but also has the functions of high temperature resistance, low temperature resistance, aging resistance, and corrosion resistance. So, as the main body of the metal hose, the metal corrugated pipe happened like this.