Learn how to put in a root with TIG. Most places require you to take and pass 2 or more processes. One petro-chem plant I had to take 5 test. 1)Tig root and 7018 FC on carbon, 2) Stainless, 3)5p+ root, 7018 out, 4)Tig out on chrome, 5)2" socket weld and pass all of them.