Heléns manages more than 112,000 tons of steel products annually, dispersed over 21,000 different articles divided into 16 product groups. This makes us a full-range supplier that offers seamless, welded, hot-rolled or cold-drawn tubes, individually or in combination with each other, in a wide range of steel grades, in dimensions ranging from 4 x 1 to 3048 x 28 mm.
Heléns stocks a wide range of roller-polished and honed cylinder tubes. Our cylinder tubes have good even surface and narrow tolerances. For simple applications, we can offer a wide range of drawn cylinder tubes.
Honed/skived and roller burnished cylinder tubes
Material E355+SR (St 52 BK + S), EN 10305-2 (DIN 2393) tolerance ISO H8, Ra = max 0.4 mu.
Cold drawn cylinder tubes
RTU material E355C (St 52-3 BK), EN 10305-2 (DIN 2393), tolerance ISO H9/H10, Ra = max 0.8 my.
Heléns provides hollow section in both cold- and hot-formed designs in manufactured lengths of 5, 6, 7, 10 or 12 m.
Cold-formed hollow sections
Our hollow sections can be obtained in cold-formed tubes from the warehouse. The cold-formed hollow sections (KKR) are manufactured accordance with EN 10219 with quality S355J2H.
Hot- formed hollow sections
Hot-formed hollow sections can be delivered directly from the manufacturer or from one of our partners.
Welded cold-drawn precision steel tubes
Heléns offers a wide range of both welded and special 07 welded cold-drawn precision steel tubes.
Welded cold-drawn steel tubes
Manufactured in accordance with EN 10305-2 (DIN 2393). We stock drawn tubes with +C and thermal-treated +N finishes. Regular steel qualities are E195 and E235. The tubes are cold-drawn on the inside and outside. Thanks to the manufacturing process, the tubes have very good centricity and narrow tolerances in terms of outer diameter and material thickness. In accordance with the manufacturing standard EN 10305-2, permitted lengths for delivery are between 4 and 7 metres. We primarily stock lengths from 5 to 7 metres.
Welded cold-drawn precision steel tubes
Manufactured in material E195 normalised (NBK) for oil pipelines and hydraulic systems. External tolerances in accordance with EN 10305-2; internal material thickness tolerances in accordance with EN 10305-3. Internal weld seam max. 0.3 mm. OD 5–12 mm leak-tested through a helium leak test 35 bar. OD >12 mm leak-tested through eddy-current testing. Outside bright surface and lightly oiled. Delivered from the warehouse normally in 6,000 mm in size.
Welded line pipes
Welded line pipe tubes intended for pressure, manufactured in accordance with EN 10217-1 with quality P235TR1 or EN 10217-2, P23TGHTC1. Please refer to the standard specification for other information.
Welded precision steel tubes
Welded precision steel tubes have properties that provide excellent formability, weldability and coatability. They also have a high level of durability and surface quality. Together, these properties provide greater freedom for dimensioning and design, and thereby the possibility to create stylish and optimal constructions.
Round welded precision steel tubes
Our warehouse stock tubes are made from cold-rolled strips E220, S3 + CR2 or pickled hot-rolled strips E220, S2 + CR2. The tubes are stocked in manufactured lengths of 6,100 mm and are lightly oiled.
Square welded precision steel tubes
Our warehouse stock tubes are made from cold-rolled strips E220, S3 + CR2. The tubes are stocked in manufactured lengths of 6,100 mm and are lightly oiled.
Welded round construction tubes
Our welded construction tubes are characterized by high concentricity and a high degree of measuring accuracy.
Welded cold-formed circular structural tubes
Welded structural tubes manufactured in accordance with EN 10219-1 in quality S235JRH, particularly suitable for hot dipped galvanizing.
Seamless cold-drawn precision steel tubes
Seamless cold-drawn precision steel tubes in accordance with EN 10305-1 have narrow tolerances, good surface smoothness and specific durability properties. We stock tubes in E235 quality, which is a carbon steel with good welding and cutting properties. In accordance with EN 10305-1, permitted lengths for delivery are between 4 and 7 metres. We primarily stock lengths from 5 to 7 metres.
Seamless hydraulic pipeline tubes
Manufactured in accordance with EN 10305-4 (DIN 2391/C). Normalised, eddy current-controlled, phosphated or non-phosphated, oiled. These tubes are particularly suited for hydraulic and pneumatic systems. We stock these tubes in E235 quality as standard, but E355 can be offered in several different dimensions. The density of both phosphated and non-phosphated tubes is tested by eddy-current testing. The tubes are stocked in manufactured lengths of 6 000 mm. Certificate EN 10204/3.1 can be obtained at an additional cost. We only stock the bonderised variant of E355.
Galvanized hydraulic pipeline tubes
Manufactured in accordance with EN 10305-4 (DIN 2391/C). Our stock of galvanised hydraulic pipeline tubes are normalised, eddy-current controlled, electrolytic zinc-coated (min 12 my or min 25 my) and VI-free thick-film passivated. These tubes are particularly suited for hydraulic and pneumatic systems. We stock E235 and E355 qualities. All hydraulic pipeline tubes are leak tested using eddy-current testing. The tubes are delivered with manufactured lengths of 6 000 mm.
The surface of ZistaPlex has very good forming properties, which means that common processing operations can be performed on ZistaPlex without damaging the surface. Threading in accordance with DIN and SAE can also be performed without removing the coating.
- Yellow goods machinery
- Agricultural machinery
- Cranes and overhead crane structures
- Wind power
- Oil platforms
- Trucks and buses
- Railway vehicles
- Terminal forklifts
- HPL tubes
- Cooling pipes for trucks and bus engines
- Fuel, gas and power steering lines
- Hydraulic line pipes for automotive applications
- End shaping
Seamless hot-rolled tubes
Tubes for construction and machining. Heléns has a complete stock of grades and dimensions to suit your production. In cooperation with leading suppliers, we can offer the best alternatives when it comes to quenched and tempered, case-hardened and bearing steel.
Seamless hot-rolled steel tubes
In accordance with EN 10210-1 for grade S355J2H and EN 10297-1 for grade E355+AR, which most closely matches SS 2172-03. The tubes are impact tested at –20 degrees, stamped with a batch number and delivered in manufactured lengths or fixed cut lengths. Tolerances in accordance with EN 10210-2. Certificate in accordance with EN 10204/3.1 can be provided upon request.
Boiler tubes & fittings
Helens offers a wide range of boilertubes & fittings. As part of the Van Leeuwen Group we have access to leading European manufacturer who provides necessary material demands, specifications and delivery time.
Boiler tubes & fittings - EN
Helens assortment of boilertubes & fittings includes seamless and welded. Tubes are stocked acc EN10216-2 in P235GH TC1/TC2. Fittings are stocked acc EN10253-2 Type A/B in P235GH and flanges acc EN1092-1 type 02-05-11 in P250GH. We also provide tubes & fittings in alloyed material such as 16Mo3, 13CrM09-10 and 13CRMo4-5. All material is provided with certificate EN10204 3.1.
Boiler tubes & fittings - ASTM
Helens offers tubes, fittings and flanges acc ASTM. Tubes are mainly seamless, material A106/B and A333/6. Fittings are stocked in A234/WPB and A420/WPL6. Flanges are stocked in A105 and A350/LF2. All material is provided with certificate EN10204 3.1.
Water pipeline tubes
Heléns offers a complete range of water pipeline tubes, fittings such as elbows, spools, reducers and tees. Thanks to our international network, we meet the necessary material requirements, specifications and delivery times. We also provide the market’s widest range of dimensions in our range of tubes, extending from 80 to 1,800 mm.
TUBES AND FITTINGS FOR WATER PIPELINES
The Heléns range includes commonly used standards such as EN 10224 and ISO 3183 with material quality characteristics of P235GH TC1, P235TR1, P355TR1, L235 and L355. The tubes are supplied in accordance with the standard EN10217-1 or EN10217-5 (material certificate in accordance with EN 10204-3) with protective plastic caps and with maximum diameter in tolerances of +/–3 mm. The tube range covers dimensions from 80 mm to 1,800 mm in combination with all types of couplings such as DIN/G, flange and sealing clamp. We also offer long-term stock-holding as required, as well as assistance with space for internal cement coating of field welds.
Tubes for machining. Heléns has a complete stock of grades and dimensions to suit your production. In cooperation with leading suppliers, we can offer the best alternatives when it comes to quenched and tempered, case-hardened and bearing steel.
Seamless hot-rolled hollow bars
Heléns has a wide range of hollow bars for machining, with good cutting properties. Our stock tubes are manufactured in accordance with ISO 2938 or EN 10294 with guaranteed clean turned sizes. Manufactured in accordance with EN 10294-1 in material E470. Guaranteed clean turned size after machining with external chucking applies to lengths up to 3 x OD, but maximum 200 mm. The tubes are stamped with the batch number. Certificate in accordance with EN 10204/3.1 can be provided upon request.