This work presents the uncertainty evaluation associated with the measurement of linear parameters that define the weld geometry, specifically the width, using a profile projector, in order to meet the current technical standards. The following steps were proposed and implemented: identification of linear parameters that define the weld geometry; identification and study of variables that affect the measurement of these parameters; the adoption of the mathematical model to estimate the uncertainty; planning and execution of experiments for data collection, calculation of uncertainty and, finally, analysis and discussion of the results. Through the results analysis it was concluded that the weld in overhead position produces the lowest front bead width values and the vertical weld produces the largest width values. The expanded uncertainty values were between 0.016 mm and 0.075 mm for all measurements, and the overhead position showed, on average, the highest values.
 Soldagem & Brasagem, “Historia da Soldagem,” 2012. http://soldagemebrasagem.blogspot.com.br/2012_03_22_archive.html
 P. J. Modenesi, P. V. Marques and D. B. Santos, “Introdução à Metalurgia da Soldagem,” Belo Horizonte, Brasil, 2012, p. 209. http://demet.eng.ufmg.br/wp-content/uploads/2012/10/metalurgia.pdf
 A. R. Valdés, E. M. Díaz Cédre, A. C. Crespo and A. Piratelli Filho, “Incerteza na Medição dos Parametros Geométricos do Cordão de Solda,” Soldagem e Inspeção, Vol. 16, No. 1, 2011, pp. 62-70. http://dx.doi.org/10.1590/S0104-92242011000100008
 C. M. D. Starling, P. J. Modenesi and T. M. D. Borba, “Caracterização do Cordão na Soldagem FCAW com um Arame Tubular (“MetalCored”),” Soldagem e Inspeção, São Paulo, Vol. 16, No. 3, 2011, pp. 285-300.
 R. A. Valdés, A. C. Crespo, A. Piratelli-Filho and E. M. Díaz Cedre, “Aplicación de Criterios Metrológicos a la Evaluacióndel Recargue por Soldadura,” São Luís, Maranhão, Brasil, CONEM, 2012, p. 10.
 J. S. Kim, L. S. Kim, J. H. Lee and S. M. Jung, “An Experimental Study on the Prediction of Back-Bead Geometry in Pipeline Using the GMA Welding Process,” International Scientific Journal, Vol. 49, No. 1, 2011, pp. 53-61.