What should be paid attention to when choosing stainless steel metal hose

Stainless steel metal hoses is one type of our flexible metal hoses, I believe everyone is familiar with stainless steel metal hoses, because they are often used in Pipelines, and metal hose assembly plays a big role.What should be paid attention to when choosingstainless steel metal hose? 

1.Transport medium. If the guaranteed medium in the hose has acidic or alkaline chemical properties and is prone to chemical reactions, the material of each part of the hose should be reasonably selected according to the corrosion resistance of the hose material. Thermal shrinkage of stainless steel metal hoses, external vibrations and shocks, alternating working conditions, regular monitoring and short maintenance times, poor management, etc. can also affect the service life of hoses. Hesper’s PTFE lined braided metal hose, maybe a better choice.

2.The water hammer phenomenon is a pressure transient process caused by a sudden change in the active state of the medium and a change in the fluid momentum in the pipe. It is a special oscillation phenomenon caused by unstable activities in the Tube. The sharp rise and fall of the pressure wave traveling through the pipe creates a noise similar to a hammer hitting the pipe, hence the name water hammer. As the water flow moves, the effect on the bending of the pipe becomes more intense. Therefore, users should follow the requirements of operating procedures, such as slow heating, stable pressure, reducing instantaneous flow and pressure changes, and preventing water hammer. When you choose flexible metal hose, need to consider the pressure requests and compensatory range, Hesper can customize stainless steel metal hoses which the right thickness.

3.Corrosion. The active anions in the medium are easy to destroy the passivation film of the stainless steel. There are small corrosion holes on the base metal, which are the active centers of pitting corrosion. The surface potential of the metal in the etched hole is negative, and the surface potential of the metal outside the etched hole is positive, so the inside and outside of the hole constitute an active passive micro-galvanic corrosion cell. The battery has a large cathode and small anode area ratio structure, the anode current density is high, and the etching hole deepens quickly. The strength of the metal hose is reduced after corrosion, and it is easy to fail when it is subjected to internal pressure and tensile load. Therefore, metal hoses used in corrosive environments should select data in a targeted manner, increase protection measures, and improve corrosion resistance. We(Shandong Hesper) can give you suggestions for which flexible metal hoses is better for you.

4.Temperature, if metal hose is used at high temperature, according to the working pressure temperature correction coefficient of the metal hose at high temperature, reduce its rated working pressure to ensure the use under safe conditions. Our metal hose matal hoses’ material have many choices, like carbon steel, SUS 304, SUS316, SUS321, we can give you suggestion according to your temperature requests.

5.Fatigue failure, under dynamic working conditions, metal hoses often suffer from fatigue crack damage under the action of cyclic loads. This destruction is a normal failure. In order to prolong the service life, we should ensure that the design and selection of the hose are correct, the equipment is accurate, and the hose will not produce deformation and other additional stress.

If you want more details or not sure what material of metal hose you can choose, welcome to contact us.