Which of the following is essential for preventing pipeline corrosion?

Regular inspection and maintenance are indeed essential for preventing pipeline corrosion. This process involves routine checks for signs of wear, leaks, and corrosion within the pipeline system. Regular inspection allows for early detection of potential issues before they escalate into significant problems, thereby ensuring the integrity and longevity of the piping. Components such as cathodic protection systems, protective coatings, and proper operational practices can be monitored and maintained effectively through regular inspections, significantly mitigating the risk of corrosion.

In contrast, increasing water pressure can actually exacerbate the risk of leaks and can stress pipe materials, potentially leading to more corrosion. Limiting the use of water may help in other areas of conservation but does not address the prevention of corrosion in pipelines. Adding more chemicals may temporarily alter the water's chemistry but could also introduce new issues, such as chemical reactions that might lead to further corrosion, without ensuring a comprehensive approach to maintenance and inspection.