Who can approve an extension to the 10-hour maximum storage time for low hydrogen electrodes in auxiliary containers?

• A. The project manager
• B. The QA supervisor
• C. The supplier
• D. The engineer

Answer: (D)

Extending the storage time for moisture-sensitive low hydrogen electrodes is a technical control decision that affects weld quality. Because hydrogen content in the electrode can rise if it stays in storage longer than allowed, determining whether an extension is acceptable involves understanding material properties, storage conditions, and how they interact with the welding procedure. The engineer is the person responsible for the welding procedure, material handling specifications, and ensuring compliance with codes and project documents. They can evaluate the impact of the extension, verify that storage conditions (like temperature and humidity in the auxiliary container) still meet requirements, and authorize any changes to procedures or WPS.

The project manager focuses on schedule and coordination, not technical approval of storage limits. The QA supervisor enforces adherence to approved procedures but does not unilaterally authorize changes to storage times. The supplier provides guidelines for their products but does not grant project-specific extensions to storage time.

So, the extension to the 10-hour maximum storage time should be approved by the engineer, who has the technical authority to assess and authorize such changes.