The end pieces of flexible hose fittings such as nipple, coupling/sleeve (usage with union nut), nut, etc. can be manufactured from materials such as stainless steel, carbon steel, chrome coated, brass, chrome coated brass, etc. in conformity with TS EN standards as desired or stipulated by the standard. In the nonstandard application, the right material selection by user/manufacturer is important such as in the hose.

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

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.

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.

For situations in which we need more bending flexibility, hoses with Ω shaped corrugations are applied that for the sake of increasing number of convolutions per unit length without thickness reduction of the bellows plate, they benefit from a longer lifetime in bend loadings. This type of flexible hose tends to return to its initial form when released from loading and also they are appropriate for vacuum situation. Ω shaped corrugations are more pressure resistant as well