What I would like to do is give you some pointers based on some of the failures and successes we have gone through to qualify ourselves. (For specifics go to the rebar welding qualification in section-6 of the AWS D1.4 code for Structural Welding Reinforcing Steel). I’ll describe some basics of what is required for a company and a welder to get qualified to weld rebar. Unlike the structural welding certification which is relatively simple. Rebar welding and qualifier testing requirements can be confusing and difficult which can make it easy to make a mistake when designing a rebar welding qualifier, or testing. If you put some thought to it and look ahead at what you might be required to weld you can save yourself time and money by doing it right once.
There are three processes described in the code; SMAW-shielded metal arc welding, GMAW- gas metal arc welding and FCAW- flux cored arc welding. The process we use for rebar is SMAW (stick welding) so for this paper I will be referencing SMAW.
Qualifying under the AWS D1.4 code there are two primary areas you need to focus on: