"The term "Coded Welding", ''Code Welding'' or "Welding Codes" means that the person who says he or she is a "coded welder" has taken an exam in a welding process using a certain method. (Welder Approval Test)Think of it as a bit like learning to be a pilot. Once you have qualified as a pilot you then have to take type approval tests to be able to fly different types of aeroplane.

The same applies to welding codes. If you wanted to work for a company who installed stainless steel tubing in factories then you would probably train for a coding using TIG welding for stainless steel tube in an all postion 6G configuration. You need to consider 1.Process. 2.Material. 3.Thickness. 4.Type of joint.5.Position (Difficulty). Usually 1G is the easiest and 6G the hardest.

My own codings are in MIG and MMA(stick), Mid steel plate in the vertical up position."