If they are certified, welders have taken a test that uses x-ray to determine if they are a good welder. You could have your own welds tested....might ease you

If they are certified, welders have taken a test that uses x-ray to determine if they are a good welder. You could have your own welds tested....might ease your mind a bit. https://goo.gl/jrECSv https://goo.gl/jrECSv