A slip type expansion joint:

A slip type expansion joint is designed to accommodate movement caused by thermal expansion or contraction in piping systems. It allows sections of piping to slide relative to each other, which helps to reduce stress on the system and prevents potential damage.

The correct choice highlights the need for lubrication in slip type expansion joints. Lubrication is essential because it reduces friction between the sliding components, ensuring smooth operation and preventing wear over time. Without adequate lubrication, the joint may become stiff, leading to increased wear and the potential for failure due to binding.

In contrast, while it is true that slip type expansion joints can adjust for some misalignment, they are specifically not limited to low pressures and temperatures, which means they can handle various conditions when properly selected and maintained. Additionally, while these joints generally require minimal maintenance, they still demand some degree of oversight, particularly regarding lubrication, to ensure optimal performance.