Welded steel pipes

Range

Production of HFW pipes from DN 3" (88.9 mm) to DN 12" (323.9 mm) for thicknesses from 2.9 mm to 12.7 mm in steel up to X70-L485, lengths from 6.0 to 13.3 m.

• water pipes: EN 10224;
• methane pipes / pipes for combustible fluids: ISO 3183 PSL1 / PSL2; API 5L PSL1 / PSL2;
• high pressure pipelines: EN 10217-1 / EN 10217-2 / EN 10217-3 (PED);
• structural pipes: EN 10219 (CPD-CPR);
• black, galvanized and coated pipes for plumbing applications: EN 10255;
• pipes according to standards: UNI, EN, ISO, DIN, ASTM, NF, BS;
• protection pipes, grommets pipes.

Supply of pipes DN <3 "(88.9 mm) and DN> 12" (323.9 mm) through qualified partners and checked by our technicians in our internal laboratories.

In-depth

The carbon steel pipes produced by RGS are made exclusively from killed and hot rolled steel strips suitably desulphurized and dephosphorised to ensure the best mechanical and technological performance.

Main characteristics of longitudinally welded carbon steel pipes:

• High mechanical resistance to stresses, both static and dynamic (water hammer, external overloading, unexpected ground collapse).
• Constance of mechanical features in time, even in presence of cyclic conditions of stress and tension (fatigue of the materials).
• Simple pipeline laying, due to the considerable flexion (thanks to the high elasticity module) meaning capacity to fit to trench profiles that are not perfectly straight and to the construction of bended sections with a large radius not needing the use of special accessories.
• The availability of pipes of single length up to 13.3 metres, with considerable economic advantages thanks to the lower necessary number of welded joints.
• Lower overall cost of the pipeline, at an equal working pressure, getting cheaper and cheaper the larger the diameter.
• Chance of using high grade steels with enhanced performance necessary for higher working pressures and so possibility of using lower wall thicknesses at a globally lower cost compared to other alternative materials.
• Chance of choosing coating solutions targeted and suitable for the use for which the pipeline is designed.
• Chance of applying, on the chosen coating, a further mechanical rock-shield protection in fibre glass reinforced cement, in order to have the pipeline been laid directly in the digging trench with no need to prepare a sand bed, sand which is not always easy to get in the nearby of work sites.

Carbon steel HFI-W pipes are no doubt the best choice of the market encompassing the production technologies and the application range for the following reasons:

• Steel is the material with the best performances in terms of resistance, resilience, flexibility, weldability, suitable for every requirement.
• High Frequency electro-welding with no filler material (HFIW) combines the advantages of the seamless pipes (continuity of the material at microscopic level) with the advantages of the welded pipes (raw material with uniform size and mechanic characteristics, thoroughly checked by the producers) at a lower cost (thanks to the higher productivity of the plant)
• Induction (HFI-W) used to obtain the best distribution and uniformity of the welding energy (with no wearing parts)
• Weld Annealing used to obtain a uniform metallographic structure, practically indistinguishable on the whole pipe
• Integrated control System on 100% of the production