Why prequalified welding procedures are exempt from testing

Prequalified joints provide values for groove angles and allowed deviations (tolerances). Tolerances allow for wider groove angles but not narrower. To get a narrower angle the root opening must be increased .

One of the advantages of using prequalified welding procedures is that you can save a lot of time and money because they are exempt from testing.  This means you don’t need to perform any destructive or nondestructive testing.  You simply follow the requirements of AWS D1.1 and you can write a prequalified welding procedure and […]