[1. EuroPipe - Mulheim Pipecoatings, UOE pipe manufacturing process, http://www.europipe.com/products/manufacturing-process/, Mülheim an der Ruhr, Germany, (2016). (Accessed 10/06/2016)]Search in Google Scholar
[2. Adlan-Wan, Nawang Wan, An experimental study on the springback in bending of w-shaped micro sheet-metal parts, MATEC Web of Conferences 21, 09015,pp 1-2, Les Ulis, France (2015).10.1051/matecconf/20152109015]Search in Google Scholar
[3. Tomasz Trzepiecinski, Effect of Computational Parameters on Springback Prediction by Numerical Simulation, Metals, MDPI, pp 1-2, Basel, Switzerland, (2017).10.3390/met7090380]Search in Google Scholar
[4. Jack Hu, John Duncan, Mechanics of the sheet metal forming, Technology and Engineering, Amsterdam, Netherlands (2002).]Search in Google Scholar
[5. Leonid Rudmann, Spravochnik constructora shtampov, Izd. Mashinostroenie, pp 202-204, Moskow, URSS (1988).]Search in Google Scholar
[6. Leonid Rudmann, Spravochnik constructora shtampov, Izd. Mashinostroenie, pp 19-20, Moskow, URSS (1988).]Search in Google Scholar
[7. G. Siempelkamp GmbH & Co. KG, Pipe manufacturing process, http://www.siempelkamp.com/fileadmin/media/Deutsch/Download/Bulletin/bulletin_2005_02.pdf , Krefeld, Germany (2016) (Accessed 12/08/2016)]Search in Google Scholar
[8. Autodesk, AutoCAD 2013 - student version, www.autodesk.com (2015).]Search in Google Scholar
[9. Standard Specification for High-Strength Low-Alloy Nickel, Copper, Phosphorus Steel H-Piles and Sheet Piling with Atmospheric Corrosion Resistance for Use in Marine Environments, ASTM A 36 high strength low alloy steel, https://www.astm.org/Standards/A690.htm,West Conshohocken, USA (2016). (Accessed 24/11/2016).]Search in Google Scholar
[10. Water cutting machine, Maxiem 1530, Data sheet, pp 5-6, South Kent, USA (2016).]Search in Google Scholar
[11. EuroPipe - Mulheim Pipecoatings, Large diameter pipes, http://www.europipe.com/products/large-diameter-pipes-line-pipes/, Mülheim an der Ruhr, Germany, (2017). (Accessed 10/12/2016)]Search in Google Scholar
[12. Corus Tubes, Tubes manufacturing, https://www.tatasteeleurope.com/en/products-and-services/long/tube/conveyance /install, London, United Kingdom (2015) (Accessed 12/04/2015)]Search in Google Scholar
[13. Dmitri Delistoian, Studiul numeric si experimental al tensiunilor reziduale din procesul de fabricatie a conductelor magistrale, Raportul de cercetare Nr. 3, Constnta Maritime University, pp 54-55, Constanta, Romania (2017).]Search in Google Scholar
[14. Society of Petrolium Engineers, Strenght of casing and tubing, http://petrowiki.org/Strength_of_casing_and_tubing, Richardson, Texas, USA (2015), (Accessed 25/05/2015).]Search in Google Scholar
[15. X60 steel, Metallurgical certificate Nr. 14/415842, Daewoo International Corporation, Seoul , South Korea (2014).]Search in Google Scholar
[16. Ion Tudose, Rezistenţa materialelor Ed. Didactică şi Pedagogică, pp 320-324, Bucureşti, Romania (1981).]Search in Google Scholar
[17. Ion Tudose, Rezistenţa materialelor Ed. Didactică şi Pedagogică, pp 120-125, Bucureşti, Romania (1981).]Search in Google Scholar