0012-7353 0012-7353 S0012-73532019000100355 10.15446/dyna.v86n208.70364 Ecuador Ecuador 00 03 2019 00 03 2019 86 208 355 361

[1] 2009 20 3 3 19-30 [2] 2015 19 77 77 160-5 [3] 2010 20 122-41 [4] 2006 7 [5] 1975 12-5 [6] 1998 34 271-5 [7] 1 9 [8] 2011 4 29-37 [9] 2010 85 2 2 123-30 [10] American Welding Society (AWS) 1999 [11] American Welding Society (AWS) 2009 [12] ASME 2009 [13] 2014 93 124-30 [14] 2010 46 6 6 493-8 [15] 1999 292 292-300 [16] 2007 Buenos Aires [17] [18] American Welding Society (AWS) 2007 [19] 2014 9 415 [20]