What is the minimum circular handhole size?

The minimum circular handhole size is determined by industry standards and regulations that ensure safe and efficient access for maintenance and inspection of equipment. A handhole of a certain diameter must allow personnel to enter and exit comfortably, as well as provide adequate space for tools and equipment used for maintenance tasks.

In this context, 380mm is the correct minimum size for a circular handhole. This dimension ensures sufficient access while minimizing the risk of accidents or injury during operations. Moreover, following standard sizing helps maintain uniformity in equipment design, facilitating the training of personnel and ensuring compliance with safety regulations.

Understanding why the size is standardized also involves recognizing the balance between accessibility and structural integrity; a handhole that is too small may hinder maintenance work, while one that is excessively large could compromise the strength of the vessel or equipment housing.