Subsea pipelines are the lifelines of offshore energy and they transport vital resources across the seafloor under extreme conditions. Installation requires precise planning, advanced engineering and specialized equipment to ensure stability and safety. Once operational they need regular inspections, repairs and preventive maintenance to protect against corrosion, leaks and structural damage. The reliability of these systems is critical for reducing downtime, meeting energy demands and maintaining compliance with international safety standards. Advances in underwater technology improve efficiency, resilience and shape the future of subsea energy transport.