What type of damage is considered rejectable during pipeline inspection?

• A. Surface discoloration
• B. Gouges, buckles, wrinkles, ripples, or ovalities
• C. Minor scratches
• D. Rust or corrosion

Answer: (B)

Gouges, buckles, wrinkles, ripples, or ovalities are considered rejectable damages during pipeline inspection because they can significantly compromise the structural integrity and safety of the pipeline. These types of defects are indicative of more severe issues related to the mechanical properties of the material and may lead to failures under operational stress, affecting the pipeline’s ability to safely transport substances.

Unlike surface discoloration or rust, which may not inherently affect the mechanical performance of the pipeline as critically, these specific types of damage can alter the thickness and uniformity of the pipe material, potentially leading to leaks or catastrophic failures. Acceptance criteria set forth in industry standards often explicitly classify these defects as unacceptable due to the associated risks they pose to the pipeline system's reliability and safety.