Are craters acceptable in a completed groove weld according to AWS D1.1?

In the context of AWS D1.1, craters in a completed groove weld are not acceptable and must be removed. The presence of craters can indicate potential issues with the weld's integrity, such as susceptibility to cracking or other defects. A crater is a depression or void left at the end of a weld bead, which can compromise the strength and performance of the welded joint. AWS D1.1 emphasizes the importance of producing sound welds that meet specified quality standards, and any defect, including craters, could impact the structural reliability of the weld.

To ensure the weld quality is maintained, these craters should be addressed—either through proper welding techniques to avoid their formation or through removal if they do occur. The code provides guidelines and requirements to ensure the welded connections can withstand the intended service loads without failure. In summary, craters being unacceptable aligns with the fundamental principles of maintaining structural integrity in welded constructions as outlined in AWS D1.1.