Flexible hoses provide ease of installation and use, as well as corrosion resistance. They can convey fluids such as natural gas and hot/cold water. Stainless steel hoses are manufactured in compliance with the standards of TSE and EN ISO and undergo specific tests. Manufacturers receive certification for products that pass these tests, and customers are advised to pay attention to these certifications.

Flexible hoses are made of a thin stainless steel band formed as a tube , seamed by longitudinal welding and finally corrugated with convoluted profiles . It means that each corrugation is perpendicular to the pipe centerline and its movement is independent from other corrugations . We call them &#;low pitch&#; when corrugations are positioned too close to each other and &#;high pitch&#; when they are a little bit farther from each other

Under the previous title, we stated that the word of &#;quality&#; does not have the same meaning with &#;qualified&#; as we use in daily life and it is rather related to the elements contained in the metal itself. In other words, it refers to material types which come into existence when the elements such as chromium, nickel, molybdenum, etc. in the raw material are available in varying ratios.

If it is going to be dispatched immediately after coiling and packing, then the “hose” becomes a product, e.g. solar flex hoses. On the other hand, if it is going to be delivered as a “ flexible hose assembly” it must pass through at least one of the stations mentioned below. During these processes, the semi-finished products are subjected to one or several leakage tests. In other words, each product will have been tested at least times in total without any exceptions.

Flexibility of a metal flexible hose is result of its convolutions bending. A flexible hose life time depends on its bending stiffness, working temperature, corrosive condition, pressure and applied vibrations. Braid doesn&#;t affect hose flexibility so much, but a flexible hose which is exposed to excessive tension, might over elongate and consequently the corrugations might get opened up. For higher pressures two braid layers are applied and for vacuum or extremely low pressure situations a corrugated hose without any braid might be used