Which of the following new welds does not need to be examined by magnetic particle or liquid penetrate methods?

Which of the following new welds does not need to be examined by magnetic particle or liquid penetrate methods?

• A. The reinforcing plate-to-shell welds
• B. Stress relieved assemblies
• C. The insert plate-to-shell welds
• D. The nozzle neck-to-shell welds

Answer: (C)

The reason the insert plate-to-shell welds do not require examination by magnetic particle or liquid penetrant methods is due to the nature of their installation and the industry codes governing these practices. Insert plate-to-shell welds are typically made under conditions where other inspections suffice, particularly if the welds meet specific criteria related to their geometry and location. In many cases, these welds are located in areas where the risk of defects is lower or where other inspection techniques, such as visual inspection, are deemed sufficient to ensure integrity. Additionally, the regulatory framework or the standards under which the tank was built may provide exemptions for certain types of welds based on their configuration and the surrounding structural elements. This context makes it clear that while other weld types—such as reinforcing plate-to-shell, stress relieved assemblies, and nozzle neck-to-shell welds—often present higher risks of stress concentrations and thus require more stringent non-destructive testing, insert plate-to-shell welds can be effectively monitored through less invasive means, provided they comply with the established standards.

The reason the insert plate-to-shell welds do not require examination by magnetic particle or liquid penetrant methods is due to the nature of their installation and the industry codes governing these practices. Insert plate-to-shell welds are typically made under conditions where other inspections suffice, particularly if the welds meet specific criteria related to their geometry and location.

In many cases, these welds are located in areas where the risk of defects is lower or where other inspection techniques, such as visual inspection, are deemed sufficient to ensure integrity. Additionally, the regulatory framework or the standards under which the tank was built may provide exemptions for certain types of welds based on their configuration and the surrounding structural elements.

This context makes it clear that while other weld types—such as reinforcing plate-to-shell, stress relieved assemblies, and nozzle neck-to-shell welds—often present higher risks of stress concentrations and thus require more stringent non-destructive testing, insert plate-to-shell welds can be effectively monitored through less invasive means, provided they comply with the established standards.