What must be done to unprotected lines that are buried or grouted?

Unprotected lines that are buried or grouted must be removed from service to ensure safety and compliance with regulations. When these lines lack adequate protection, they risk deteriorating due to environmental factors such as moisture or soil erosion, potentially leading to leaks, contamination, or catastrophic failures.

The removal from service serves as a critical step in maintaining safety standards and preventing incidents that could endanger both personnel and the surrounding environment. Other options such as insulating, painting, or reinforcing do not adequately address the underlying issue of providing necessary protection for the lines, which is why the focus on removal is the most effective and responsible action. Removing these unprotected lines from service not only mitigates risk but also provides an opportunity for replacement or re-installation with proper protective measures, ensuring long-term viability and compliance with fuel code standards.