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Guidelines for choice and application of hoses

During use technical hoses are exposed to a number of loads and must satisfy many requirements, for example:

  • resistance to the material flowing through them
  • pressure and/or vacuum-resistance
  • good flow properties
  • resistant to high and/or low temperatures
  • light and flexible 
  • resistant to weather influences and aging
  • strong and wear-resistant.

It is clear that no single hose type can satisfy all these requirements. So all specific operating conditions must be known to be able to assess which hose must be used.

What is to be mentioned when ordering hoses

Always fully mention the purpose of use, in particular:

  • which medium is to be transported
  • what is the concentration, and at what temperature
  • how high is the working pressure or the vacuum
  • what is the ambient temperature.


To avoid any mistakes always mention the inside diameter of the hose and remember that this must be equal to the external diameter of the tailpiece or connecting piece. Many hoses are provided with a mark, colour code or emblem. This facilitates application in practice and prevents mistakes with repeat orders.

Bending radius

Each hose has a certain minimum bending radius which is not to be exceeded. Kinks in too sharp bends cause fractures or leaks. Such damage can be prevented by supporting or guiding the hose. The information for the bending radii depends on factors including the inside diameter, the wall thickness, construction of the inlays and the materials used. The bending radii mentioned in this documentation concern a filled and pressurised standing hose.

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