Welding and brazing is always performed in accordance with a procedure. In the simplest of cases, the procedure may exist only in the mind of the welder such as an experienced farmer repairing his equipment. However, in the majority of cases, especially for structures, pressure vessels, piping, etc., a written procedure is required before work. In most cases, the written procedure must be "qualified", i.e. be tested on mockup coupons to prove its effectiveness before being applied to a real product. In all cases, qualified or not, the variables affecting the procedure must be considered and addressed in the procedure.
This course uses the organization concepts of ASME Section IX, Welding and Brazing Qualifications, to introduce some processes and variables that should be considered when planning a welding or brazing procedure. A description is provided of some of the many welding and brazing processes. Variables discussed, including some examples of each, are joint type/weld type, base material, filler material, position, preheat and interpass temperature, post weld heat treatment, shielding gas, electrical characteristics, and technique.
This course provides an excellent introduction to engineers and craftsmen who deal with welding and brazing procedures as a peripheral duty, perhaps reviewing and accepting contractor procedures, and want to more fluently "speak the language". This course is also an excellent introduction for those who will need to be more deeply involved in preparing welding and brazing procedures as a starting point for further study.