Tenaris seamless steel pipe production is based on the Electric Arc Furnace, Ladle Furnace, Vacuum Degassing and Continuous Casting process.

The Electric Arc Furnace is charged by selected scrap and different percentage of pig iron, sponge iron (DRI) and Hot bricket iron (HBI).

Operation runs automatically melting the solid charge using electric power boosted by oxygen and gas burners reaching temperatures up to 1650°C.

Once the slag is separated , the liquid steel is poured into a ladle, where ferroalloys are added.

In order to obtain the customer specified chemical composition and temperature, the ladle is treated in the Ladle Furnace and after that in some cases going to the Vacuum Degassing station before casting in the Continuous casting Machine (CC).

In the CC , the liquid steel is cast into steel round bars with diameters ranging from 145 to 395 mm. These bars are conditioned and preapared to be sent to the mills.

Once the bars enter the mill, they are cut in shorter sections called billets. The billets are loaded into the rotary furnace, where they will be heated up to a temperature of around 1300º C.

After the billet leaves the rotary furnace, it is pierced in the piercing mill resulting in a pipe called pierced material. The pierced material then passes through the continuous rolling mill to reduce and stretch its wall thickness, resulting in another pipe called continuous shell. The last rolling step takes place at the stretch reducing mill, where the pipe's final diameter and wall thickness are achieved.

Once the specified sizes are set and, according to customer requirements, the pipe is subject to heat treatment to achieve the physical and mechanical properties required by the customer.

Finally, pipes are inspected (through non-destructive tests) and threaded in order to be delivered to the end customer.