What is the purpose of handhole and manhole openings in boilers?

The purpose of handhole and manhole openings in boilers is to permit inspection, cleaning, and repairs. These openings provide access to various parts of the boiler, allowing operators and maintenance personnel to perform essential functions such as visual inspections, maintenance tasks, and cleaning of internal components. Regular inspections are vital to ensure the boiler operates efficiently and safely, as they help detect potential issues before they become serious problems.

While other options mention specific requirements or limitations regarding boilers, the primary and most critical function of handhole and manhole openings remains their role in facilitating maintenance and ensuring proper operation. Without these openings, it would be challenging to maintain the boiler's efficiency and safety standards. This makes the correct answer essential for understanding the operational and maintenance requirements of boiler systems.