16 ENERGY AND POWER APPLICATIONS OCTG tubes are used in wells and oil & gas production plants; these tubes are produced and supplied in compliance with standards API5CT and ISO11960. ATA produces OCTG tubes using high frequency induction welding (HFW) without the addition of filler metals. Following welding: • diameters up to 3’’; are rolled in a hot stretch-reducing mill; • diameters over 3 ½’’; are normalized along the weld area or full body normalized. Arvedi tubes are produced in the following Group 1 steel grades: • H40 / K55 / J55 / N80 A particular steel grade is also available: “J55 upgradable”: developed in collaboration with Acciaieria Arvedi, suitable for upgrading to steel grades N80, L80 and P110. OCTG CASING AND TUBING ARVEDI line pipes are tubes destined for conveying pressurized fluids and are typically used in the civil and industrial oil & gas sectors. These pipes are supplied both bare and coated in polyethylene and are produced and supplied in accordance with standard API5L and ISO3183. LINE PIPE
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