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What is a flexible metal hose?
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What is a flexible metal hose?

Views: 0     Author: Site Editor     Publish Time: 2021-10-07      Origin: Site

A flexible metal hose is an important component in the connecting pipeline of modern industrial equipment. A flexible metal hose is used as a wire and cable protection tube for wires, cables, automatic instrument signals, and civil shower hoses, with specifications ranging from 3mm to 150mm. A small-caliber flexible metal hose (inner diameter 3mm-25mm) is mainly used for sensor line protection of precision optical rulers and industrial sensor line protection.

Here is the content list:

Early used hose

The modern hose development process

Modern development




Early used hose

At the end of the seventeenth century, the Dutch brother's Van Del Gekin made a longitudinally stitched canvas hose, which is the early flexible metal hose, which was widely used in the fire fighting business at that time. Later, with the emergence of rubber in the international market and the development of its vulcanization process, hoses and flexible metal hoses armored with fabrics such as metal wires or hemp ropes came out. However, some high-temperature media such as steam and hot air in engineering corrosive media such as gasoline, kerosene, acid, alkali, etc., of course, cannot be transported by flexible metal hoses.


The modern hose development process

People gradually focused their attention on flexible metal hoses made of metal, changing the geometric shape of the metal tube to produce corresponding corrugations on the inner and outer surfaces. In this way, the flexible metal hose not only has the same flexibility as the hose, but also has high-temperature resistance, low-temperature resistance, aging resistance, and corrosion resistance. Thus, the corrugated flexible metal hose as the main body of the flexible metal hose was produced.

In 1855, Germany first issued a patent for manufacturing corrugated flexible metal hoses. It uses the principle of making jewelry at that time to make the corrugated flexible metal hose. Thirty years later, E·Levavas sure of France cooperated with H·Witzenmann of Germany to develop a new type of corrugated flexible metal hose. In August 1885, it obtained French and German patents. This is a spiral corrugated flexible metal hose that is wound on special equipment with a metal belt with a cross-section of s. The corrugated flexible metal hose is filled with a rubber belt, cotton fabric, or asbestos rope at the mouth of the adjacent two turns. To facilitate the sealing of the inner cavity of the corrugated flexible metal hose.

In 1894, the structure of this type of corrugated flexible metal hose was improved: People used two corrugated flexible metal hoses with different diameters to wind in opposite directions. In this way, the flexible metal hose metal belt achieves mutual balance under the force state, which overcomes the disadvantages of the self-developed corrugated flexible metal hose.

In 1929, another technological revolution was carried out in the structure of corrugated flexible metal hose, which completely solved the problem of the loss of sealing performance of corrugated flexible metal hose due to uneven changes in the grooves of the pad rubber band or asbestos rope during bending. This opened up a broad prospect for the development of corrugated flexible metal hoses. People use steel and copper-zinc alloy materials to make integral corrugated flexible metal hoses, that is, a corrugated pipe made of seamless or welded pipes. It relies on the elastic deformation of the corrugated sidewall of the flexible metal hose to maintain a certain degree of performance. The compressibility or stretchability at the same time ensures the reliable sealing of the flexible metal hose.


Modern development

Since the 1950s, double-layer, three-layer, and multi-layer corrugated flexible metal hose, especially the extremely thin-walled stainless steel corrugated flexible metal hose, have developed rapidly. To meet the application requirements, people use various flexible metal hose processes such as welding, electroforming, machining, hydraulic and mechanical spinning to manufacture corrugated flexible metal hoses. The smallest nominal diameter is 2 mm, and the largest nominal diameter can reach 400~500 mm. There are even giant corrugated flexible metal hoses with a diameter of 10 meters. The number of corrugations of the flexible metal hose is at least 1-2 and can reach hundreds, thousands, or even tens of thousands.


The flexible metal hose and Exhaust Flexible Pipe of Wuxi Xishan Huanyu Metal Hose Co., Ltd. will provide a detailed maintenance plan after you buy it. Contact our after-sales department, and professional engineers will provide you with a suitable maintenance method for your product.

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