MCC-NH Gas Fitters Practice Exam

What material is Polyamide classified as for gas piping?

1. Metal

2. Steel

3. Plastic

4. Ceramic

The correct answer is: Plastic

Polyamide is classified as a plastic material, which is significant for gas piping applications. This classification is essential because plastics like polyamide are used in various piping systems due to their resistance to corrosion and chemical degradation, lightweight nature, and ease of installation. Polymers, such as polyamide, provide flexibility and durability while maintaining structural integrity under pressure, making them suitable for transporting gas. In contrast, metal, steel, and ceramic are not applicable here as they encompass entirely different properties and uses. Metal and steel can rust or corrode, and they may require additional protective measures when used for gas transport. Ceramic materials may lack the necessary flexibility and strength required for gas piping needs, making plastic, specifically polyamide, the ideal choice in this context. This classification also informs safety standards and regulations that are crucial for sourcing materials for gas systems.