What is the code for Control of External Corrosion on Underground or Submerged Metallic Piping Systems?

The correct choice for the code that addresses the Control of External Corrosion on Underground or Submerged Metallic Piping Systems is indeed identified as SPO169. This code provides specific guidelines and requirements for the prevention and control of corrosion in metallic piping systems, which is critical for ensuring their longevity and safety.

SPO169 covers various methods and practices that are necessary to protect the integrity of these systems against external corrosion, which is particularly relevant for piping systems that are buried underground or submerged in water. Implementing the guidelines outlined in this code helps in establishing effective cathodic protection techniques and maintenance strategies.

Other options do not pertain to the specific requirements for corrosion control in this context. SP001, for example, typically deals with the standard for the inspection of above-ground storage tanks rather than underground piping. SUR101 might be related to surface preparation or similar topics, while COR021 does not specifically address external corrosion on underground or submerged piping systems. Understanding the focus of SPO169 is crucial for individuals involved in the maintenance and safety of metallic piping systems to prevent costly failures due to corrosion.