Regulations state that clearance between pipelines and underground structures must be at least what distance?

The regulation requiring a minimum clearance distance of 12 inches between pipelines and underground structures is rooted in safety and operational standards. This distance is designed to ensure that both pipelines and underground structures can function without interference from each other. Adequate clearance helps prevent physical damage during excavation or maintenance activities and allows for thermal expansion, ground movement, or vibration, which could occur from nearby traffic or machinery.

Moreover, maintaining a distance of 12 inches allows for easier access for inspections and repairs of both the pipeline and the underground structure. This is particularly important in mitigating corrosion risks, as it allows for better monitoring of the conditions around the pipeline, ensuring that any corrosion control measures can be effectively implemented.

While other distances might also be mentioned in various contexts, the specific requirement of 12 inches aligns with established industry practices and regulatory guidelines to promote safety and integrity in pipeline operations.