Blueprint Reading for Welders Basic Lines, Views and Symbols

Learn how to read blueprints and understand the basic lines and views and welding symbols associated with drawings.

Blueprint interpretation

What you’ll learn

  • Learn to identify different types of lines and interpret orthographic/isometric/oblique projections.

Course Content

  • Welcome to the Course –> 8 lectures • 31min.

Blueprint Reading for Welders Basic Lines, Views and Symbols


  • If you are just starting out in the welding world, odds are that at some point in your career you will be required to read welding blueprints in order to complete your job. At the end of the course, you will better understand the basic lines and views associated with blueprint reading and know how you supervisor want the weld to be accomplished. These instructions often include which type of weld to be used, the size of the weld, how many similar welds need to be performed, and tell the welder which joint the weld should be made. You will go over the basic lines which includes object line, hidden lines, center lines, extension lines, dimension lines, leader lines, cutting plane lines, section lines, short break lines, long break lines and phantom lines. Reading welding blueprints can be very complicated and confusing on occasions. But after you have gained some experience in reading blueprints it will become second nature. As with all welding techniques, with some time and practice you will soon began to master the processes.

Blueprint interpretation

  • Identify the lines on blueprints
  • Identify the abbreviations used
  • Identify different views

Welding symbols

  • Identify various weld symbols
  • Identify different parts of the welding symbol
  • Learn specific instructions on how to make the weld
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