Hydraulic Line Tubes (HPL) from Salzgitter Mannesmann Precision (SMP) are a high quality Seamless Cold Drawn precision tube predominantly for use
as pressure lines in hydraulically or pneumatically operated equipment though they can also be used for a wide range of other applications.
Size Range:
- Outside Diameter: 4mm to 80mm
- Wall thickness: 0.75mm to 12.50mm
- Technical standards: EN 10305-4 (Previously DIN 2391 and DIN 1630)
- Tolerances: According to table HPL Tubes
- Steel grades: E235 (ST37.4) and E355 (ST52.4)
- Delivery condition: +N (NBK) Normalised
- Design of wall thickness: DIN 2413-1 Load case I, II or III
Cold Workability:
The final heat treatment gives HPL tubing good cold workability such as bending & flaring. When bending is performed, the associated reduction
in wall thickness on the outer bend and out of roundness on the inner bend must be taken into consideration.
Weldability:
The tubes are weldable without preheating and post-weld heat in accordance with current procedures.
Corrosion protection:
All tubes are provided with corrosion protection:
HPL Tubes Black
- 2mm di <6mm: internal and external surface is lubricated
- di >6mm : internal and external surface phosphatized and lubricated or only lubricated
HPL Tubes Galvanised - Cr 6 free – high performance passivation
Externally galvanised tubes with a Zinc coating of 8 to 12 micron and subsequently passivated or chromated, plus temporary corrosion protection
(inhibitor containing mineral), resistance against white corrosion.
Other details as standard:
- In fix lengths as required
- Ends square cut, un-worked, tubes with OD < 8 mm resp. ID <= 4 mm also ends square cut, un-worked and sealed with plugs or caps
- ID <= 6 mm internal and external surface lubricated ( only for non-pinched off ends )
- ID >= 6 mm internal and external surface phosphated and lubricated resp. only lubricated ( only for non-pinched off ends )
- Tubes with inside diameter <= 4 mm sealed with plastic caps
- Tubes with inside diameter < 4 mm sealed with plastic plugs
- Eddy current tested acc. to DIN EN 10246, Part 3, class E3H
- Marking: continuously marked along a line parallel to the tube axis with manufacturer, steel grade, dimension ( OD and wall ) and test code
- Mill Test Certificate 3.1. acc. DIN EN 10204:2005
- Packed in seaworthy fumigated wooden boxes
