When evaluating the minimum acceptance criteria for undercut during the visual inspection of tubing welds, it is important to adhere to standard industry practices. Undercut is a groove that can form near the weld toe due to excessive welding speed or incorrect techniques, and it can adversely affect the strength and durability of a weld.
The given multiple-choice options are:
- a. 1/32 in (0.8 mm)
- b. 1/64 in (0.4 mm)
- c. no undercut allowed
- d. 1/16 in (1.6 mm)
Among these options, industry standards and best practices generally dictate that the minimum acceptance criteria for undercut should often be stringent to ensure the weld’s integrity and performance. This means that no visible undercut should be permissible, especially for high-precision and critical applications.
Therefore, the correct answer is:
- c. no undercut allowed
