Intro to Millwright Practice Exam 2025 - Free Millwright Skills Practice Questions and Study Guide

Metallic packing is specifically designed to be made from pliable metal, making it suitable for applications that require durability and resistance to high temperatures and pressures. This type of packing is often used in situations where traditional packing materials may not withstand the operational conditions, such as in industrial pumps and valves.

The pliability of metallic packing allows it to conform to the surfaces of the components it is sealing, ensuring a tight fit that prevents leaks. It can also withstand significant thermal and mechanical stress, making it ideal for heavy-duty applications.

Other packing types, like rubber, composite, and plastic, consist of non-metal materials that serve different purposes. Rubber packing generally offers flexibility and resistance to corrosive fluids but lacks the high-temperature stability of metallic options. Composite packing combines various materials to leverage the strengths of each but does not primarily use metal. Plastic packing is lightweight and resistant to corrosion but may not handle high-pressure environments as effectively as metallic packing.