Production Process

Home » Corporate » Production Process

Total control over the entire manufacturing cycle based on circular economy principles as well as on production waste recycling within the framework of our Zero Waste Project.

The facilities of the Pittini Group manufacture low carbon content steel for building and industrial applications from ferrous scraps that are used as raw materials by electric arc steel mills. The control of all manufacturing steps is an unquestionable advantage for the quality of finished products and ensures reliability to customers.

Our business includes the recycling of raw materials and production waste.

Steel Production of Pittini Goup

Steel Mills

The steelworks of the Pittini Group (based in Osoppo, Verona and Potenza) rely on electric arc furnace (EAF) technology, which melts charges mostly made of scrap, a recycled material (as opposed to the integral cycle). Ferrous scrap – mainly (70%) delivered to our facilities by train and constantly checked to rule out the presence of radioactive substances – ensures a low environmental impact manufacturing cycle. The billets obtained from continuous casting help feeding the rolling mills of the Group, thus enabling it to control the entire manufacturing cycle.

Wire Rod Rolling Mill

overview_vergellaPittini Group’s wire rod rolling mills are destined to the production of smooth (ø 5.5÷20 mm) and ribbed (ø 6÷16 mm) rods. Thanks to regular and farsighted investments, the rod rolling mill can rely on the most advanced technology. The billets supplied by the steel mill are subject to stringent quality checks. Subsequently, through the action of hot or cold charges, they are first homogeneously heated in the pre-heating furnace, and then rolled through a series of cages equipped with shaped oval and round cylinders, whose sequence is especially designed to optimise reduction on single passes according to the latest standards. In this way, rolled products can take the intended shapes, cross-sections and sizes, whereas the intended mechanical characteristics are obtained by controlled cooling. The high level of automation achieved at these facilities makes products more reliable and plants more efficient while reducing consumption and improving working conditions and safety of workers. Wire rods are further verticalised at the various Group facilities, where electro-welded meshes, electro-welded lattice girders, drawn products, rolled strips and welding wires are manufactured.

Bar Rolling Mill

overview_barreThe bar rolling mills of the Pittini Group are located in Osoppo and Potenza. Manufacturing processes are carefully controlled and plants are technologically advanced, which makes the two rolling mills an excellent example of efficiency and quality. The bar rolling mill produces round bars Ø 8÷40 mm. The pre-heating furnace can be charged with hot billets directly from the steel mill plate or with cold billets from stocks. Billets coming out of the furnace are fed by a roller conveyor to the roughing train, and then, at increasingly higher speeds, to rolling cages that reduce their cross-sections. Round bars are subject to thermal treatment in a water-based system (Thermex) to obtain the intended mechanical characteristics. Bundled bars with predetermined commercial lengths are made of high ductile steel, which is a crucial feature for constructions in earthquake-prone areas.

Jumbo Rolling Mill

overview_jumboOsoppo can rely on the first facility in the world for the production of Jumbo coils Ø 8÷25 mm. Also for Jumbo coils, following billet pre-heating and rolling through the various rolling cages (roughing train, intermediate mill, finishing train and BGV), round bars are subject to thermal treatment in a series of water boxes, which gradually reduce temperature in a controlled manner. Thereafter, round bars are fed to the winding machine, where they are orderly coiled. The final outcome is an ultra-compact HD no twisting coil, weighing 2.5 tons or 5,0tons. In this way, any axial twisting is eliminated and steel consistently keeps its mechanical characteristics thanks to the suppression of strain-hardening from differentiated cooling. Other advantages of Jumbo coils are: waste suppression during further processing and reduction of space requirement during transport and storage (height of about 90 cm). Jumbo coils are also made of high ductile steel, which is an indispensable requirement for constructions in earthquake-prone areas.

Electro-welded Products

overview_elettroThe 5 electro-welded mesh facilities and the electro-welded lattice girder facility of the Pittini Group are an example of efficiency combined to high quality. Also in this case, thanks to constant improvement in plants in terms of both productivity and safety, the Pittini Group can remain a leading manufacturer in this field. The Pittini Group manufactures a broad range of industrialised reinforcements, whose high quality standards are guaranteed by stringent checks made in the electro-welding departments and throughout the verticalised cycle from scraps to rods obtained from rolled billets. The building sector largely uses standard or made-to-measure zinc plated and/or moulded meshes that are designed to meet with utmost precision to design or site execution requirements, also thanks to the support of the Group engineering department in both phases.

Rolling and Drawing

overview_trafilWire rods are not only used by the electro-welding plants for meshes and lattice girders, but are also further verticalised at the two facilities belonging to SIAT S.p.A. to manufacture:

  • Gas-shielded and submersed arc welding wires to join ordinary or low allied steel;
  • Low carbon content drawn bars and coils;
  • Low carbon content rolled strips in reels.