Which code pertains to the Control of External Corrosion on Underground or Submerged Metallic Piping Systems?

The code that specifically pertains to the control of external corrosion on underground or submerged metallic piping systems is SP0169. This standard provides guidelines for the selection, design, installation, and maintenance of cathodic protection systems for buried and submerged metallic structures. It focuses on the prevention of corrosion that can occur due to soil and water conditions that affect buried infrastructure.

Understanding this code is crucial for ensuring the longevity and safety of piping systems, as it outlines best practices in cathodic protection to mitigate the impact of various environmental factors that contribute to corrosion. The emphasis on appropriate cathodic protection methods is vital for protecting assets that cannot be easily accessed for repairs or inspections.

In contrast, the other codes listed serve different purposes. For instance, RP0285 deals with the selection of coatings for buried pipelines, where it emphasizes coating performance rather than corrosion control directly. SP0176 involves the design, installation, and maintenance of cathodic protection systems but focuses more broadly on impressed current systems without the specific emphasis on underground piping. Lastly, SP0388 relates to the corrosion control of tanks and vessels that are above ground, rather than focusing on buried or submerged systems. Thus, SP0169 is the most relevant choice for controlling external corrosion on underground or