Final answer:
A plastic metal composite pipe is engineered to be both light in weight like plastic and durable like steel, often featuring resistance to corrosion and potentially having good thermal conductivity.
Step-by-step explanation:
A plastic metal composition pipe is designed to be as light as plastic pipe, and has the durability of a steel pipe. When creating materials with composite properties, engineers aim to combine the favorable characteristics of different materials to enhance the functionality of the final product. The composition of a plastic metal pipework seeks to provide an advantageous mix of properties that include being light in weight, like plastic, while also maintaining the resistance to corrosion and the structural integrity of steel, potentially incorporating its good appearance, and depending on the metals used, it might also have a good conductivity for heat and, less commonly, for electricity.