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Precision tubes for hydraulic and pneumatic cylinders


EN 10305-1 Steel tubes for precision applications. Part 1: Seamless cold drawn tubes.
DIN 2391 Seamless precision steel tubes. Part 1: Dimensions. Part 2: TDC.

HPZ type – precision tubes for mechanical treatment
HP type – precision hydraulic tubes “ready to use”

Steel grades:

E355 according to EN 10305-1, St52 according to DIN 2391, St52-3 according to DIN 17100, 20 MnV6 according to EN 10294-1


– random lengths 3 m-6 m (HPZ type), 2 m-6 m (HP type)
– fixed lengths max 6 m


1 mm / 1000 mm – measured on the outside surface.

Tube ends

Plain, on request ends can be plugged with plastic caps.

Delivery condition

+SR (EN); BKS (DIN) – cold finished / stress relieve annealed
Other conditions upon agreement (+N / NBK, +C / BK)


– cast analysis
– tensile test
– visual test
– dimensional test
– NDT (eddy current test)
– other test upon agreement


Colour stencilling along whole tube length:
– producer’s logo
– size (inside diameter x wall whickness)
– steel
– heat no.
– standard no. (or according to customer’s specification)

Surface protection

Tubes are oiled.


Tubes are packed in round or hexagonal bundles with weight max 2 000 kg, fastened with steel strips.


According to EN 10204 3.1

Dimensions, tolerances and weight of HPZ tubes

Dimensions, tolerances and weight of HP tubes