Which statement is true about wet versus dry Class A welds according to AWS D1.1?

Which statement is true about wet versus dry Class A welds according to AWS D1.1?

• A. They must be wet only
• B. They must be dry only
• C. They can be either wet or dry
• D. They cannot be designed for design stresses

Answer: (C)

The main idea here is that AWS D1.1 allows flexibility for Class A welds: they can be made or evaluated in either a wet or a dry condition. The code does not require Class A welds to be welded or tested strictly in one environment; as long as the procedure is qualified and the weld meets the specified acceptance criteria, either condition is acceptable. That’s why the statement that they can be either wet or dry is the correct choice. It isn’t true that they must be wet only or dry only, and design stresses aren’t barred for Class A welds—the design and evaluation follow normal structural requirements when specified.

The main idea here is that AWS D1.1 allows flexibility for Class A welds: they can be made or evaluated in either a wet or a dry condition. The code does not require Class A welds to be welded or tested strictly in one environment; as long as the procedure is qualified and the weld meets the specified acceptance criteria, either condition is acceptable. That’s why the statement that they can be either wet or dry is the correct choice. It isn’t true that they must be wet only or dry only, and design stresses aren’t barred for Class A welds—the design and evaluation follow normal structural requirements when specified.