Heléns product-catalogue
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Cold drawn Precision steel tubes
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Heléns stock seamless, welded cold drawn or specially welded tube in normalized or cold drawn / hard delivery qualities.
The heat treated tubes are used in constructions where there is a demand on formability. In parts where the machinability is the most important thing the cold draw / hard tubes are used. The seamless and special tubes is also stocked in zinc coated condition and are then used in applications where corrosion resistance is important.
Seamless cold drawn precision steel tubes
Seamless cold drawn precision steel tubes acc. to EN 10305-1 (DIN 2391)
Technical info Seamless cold drawn precision steel tubes
Seamless cold drawn precision steel tubes manufactured according to EN 10305-1 (DIN 2391). Cold drawn / hard + C We stock a wide dimension range from Europe´s leading suppliers. Seamless precision tubes to EN 10305-1 have strict dimensional tolerance, good surface finish and special mechanical properties.
The material E235, is a carbon steel which is both easy to weld and to cut. In accordance with the norm, delivery lengths are permitted to vary between 4-7 m. However the majority of tubes in stock are in 5-7 m lenghts.
Welded cold drawn precision steel tubes
Welded cold drawn precision steel tubes acc. to EN 10305-2 (DIN 2393)
Welded cold drawn precision steel tubes manufactured according to EN 10305-2 (DIN 2393) We stock tubes in cold drawn hard +C and normalized +N variants. The most common steel quality in our stock is E235 but E195 i also available in some dimensions. The tubes are cold drawn over a mandril. Thanks to this method of production, the tubes have very good concentricity and tight tolerances for both outside diameter and wall thickness.
In accordance with EN 10305-2, delivery lengths are permitted to vary between 4-7 m, but majority of tubes in stock are however in 5-7 m lengths.
Seamless hydraulic tubes
Seamless cold drawn hydraulic tubes acc. to EN 10305-4 (DIN 2391/C)
Seamless cold drawn hydraulic tubes manufactured according to EN 10305-4 (DIN 2391/C) These tubes are used in hydraulic and pneumatic applications. We stock these tubes in E235 quality as standards, but E355 can be offered in a few dimensions, but only in phosphated finish. Both phosphated and nonphosphated tubes are tested for leakage using eddy current testing.
The tubes are stocked in fabrication lengths of 6000 mm. A certificate according to EN 10204/3.1 can be obtained at an extra charge.
Seamless zink coated hydraulic tubes
Seamless zinc coated cold drawn hydraulic tubes acc. to EN 10305-4 (DIN 2391/C)
Seamless zinc coated cold drawn hydraulic tubes manufactured according to EN 10305-4 (DIN 2391/C). The zinc coated hydraulic tubes are used in hydraulic and pneumatic applications. We stock these tubes in E235 and E355 qualities. The zinc layer can be offered in two thickness variants, min 12 my or min 25 my which is then either yellow chromated or CR + VI free thicklayer passivated.
In the near future the yellow chromated surface treatment will be substituted with CR + VI free thicklayer passivation due to increased environmental demands All variants are tested for leakage using eddy current testing. The tubes are stocked in fabrication lengths of 6000 mm. A certificate to EN 10204/3.1 can be obtained at an extra charge.
Special welded steel tubes
Special welded steel tubes, Special 07 and Zista 07
Special 07
Special welded precision tubes, in material E195 and normalized conditions, are suitable for fluid transfer applications, for instance oil pipes and water inlet pipes. Outside diameter tolerances according to EN 10305-2, wall thickness tolerances according to EN 10305-3. Inside welding seam max 0,3 mm. OD 5 - 12 mm are leak tested with helium at 35 bar pressure. OD > 12 mm are eddy current tested. The material is cold rolled and delivered from stock in lengths of normally 6000 mm.
Zista 07
Zista 07 are manufactured in the same way as Special 07 but are zinc coated and used in applications where there is a demand for corrosion resistance. The zinc layer can be offered in two thickness variants, min 12 my or min 25 my which is CR + VI free thicklayer passivated.
Measurement table EN 10305-1 and EN 10305-4
Measurement table EN 10305-2
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