Five elements for selecting metal bellows in stainless steel bellows:
1： Size, nominal diameter of hose, type and size of joint, length of hose.
2： Pressure, actual working pressure of the hose, selected nominal pressure PN ≥ working pressure P.
3： The chemical properties of the medium input into the hose determine the material of each component of the hose according to the corrosion resistance table.
4： Temperature, working temperature and range of the medium inside the hose, and ambient temperature during hose operation. When the temperature is high, it is necessary to determine the allowable high pressure at the working temperature according to the temperature correction factor, in order to determine the correct pressure level for selection.
5： According to the condition of the hose during use, refer to the correct installation method of the hose, the length calculation of various movement states of the hose, and factors such as the small bending radius of the hose, correctly select the length of the hose, and install it correctly.
Description of metal bellows for metal hoses:
1: The working pressure PN is greater than or equal to the working pressure P, and the PN value meets the standard pressure rating. At this time, the indicated value is 10 times the standard pressure value (in MPa).
2: The main dimensions of the two end joint can be indicated in parentheses after the joint code. When the two ends are flange connected, the flange standard number can be indicated in parentheses after the code. For stainless steel corrugated pipes, metal hoses, and stainless steel compensators, when B is added after the standard number, it indicates that the material is stainless steel. When not specified, it indicates that the material is carbon steel. When the two ends are threaded, the specific code and size of the thread can be indicated in parentheses after the joint code.
3: The various components of the hose are made of materials such as pipe body 0Cr18Ni9 (SUS304), mesh sleeve ICr18Ni9Ti, connecting pipe, ball head or horn mouth made of stainless steel, and loose nut made of carbon steel. When there are different requirements, please indicate them in the purchase contract.