New York Low Pressure Boiler COF Practice

What is the initial step for preparing a weld?

1. Apply filler metal

2. Clean

3. Leave surfaces as is

4. Heat the metal

The correct answer is: Clean

The initial step for preparing a weld is to clean the surfaces that will be joined. Proper cleaning is crucial because contaminants such as rust, oil, grease, paint, or oxidation can affect the quality of the weld. If these impurities are not removed, they can lead to poor adhesion, increased likelihood of defects, and overall weak joints, which could ultimately compromise the integrity of the welded structure. Cleaning the surfaces ensures that the filler metal can properly bond to the base materials, leading to a stronger and more reliable weld. Once the surfaces are clean, further steps such as applying filler metal, heating the metal, or other preparatory actions can be effectively accomplished, but they all rely on the initial cleanliness of the surfaces being welded.