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Seamless precision and hydraulic line tubes

Seamless precision and hydraulic line tubes

Seamless precision steel tubes are produced by cold forming hot-rolled tubes (hollows) and are characterized by special features such as high dimensional accuracy and smooth surface.

Seamless hydraulic-pneumatic line tubes (HPL tubes) are seamless cold-finished precision steel tubes which are mainly used in hydraulically or pneumatically operated systems as lines and are therefore suitable for tumescent loads.

Seamless cold-drawn precision steel tubes

according to EN 10305-1

Application range

  • High dimensional accuracy for inner and outer diameter
  • Smooth surface for drawing technology
  • Increased strength values due to cold forming
  • Particularly limited wall thickness tolerances
  • Closely graded series of dimensions

Seamless hydraulic-pneumatic line tubes (HPL-tubes)

according to EN 10305-4

Application range

  • Lines in hydraulically or pneumatically operated systems
  • Assembly by releasable or non-detachable connections
  • Operational change of speed and pressure of the flowing medium
  • Threshold stress due to pressure surges due to speed changes
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