Hollow bead (HB) will be considered unacceptable if the length of an individual indication exceeds what measurement?

The criterion for determining whether a hollow bead (HB) is acceptable or unacceptable in welding visual inspections is based on the length of individual indications. In this case, if the length of an individual hollow bead indication exceeds 1 inch, it is considered unacceptable. This standard is set to ensure the integrity and reliability of welded joints, as excessive hollow bead indications can lead to potential weaknesses in the welds. An indication that surpasses this length signifies a flaw that could compromise the structural integrity of the welded joint, making it critical for welders and inspectors to adhere to this guideline for maintaining safety and quality in pipeline construction and maintenance.