Chimney Safety Institute of America (CSIA) Certification Practice Test

If a pipe connector has a diameter of less than 6 inches, what thickness of steel is required?

1. 24 gauge (0.024)

2. 26 gauge (0.019)

3. 22 gauge (0.029)

4. 16 gauge (0.056)

The correct answer is: 26 gauge (0.019)

The correct thickness of steel for a pipe connector with a diameter of less than 6 inches is indeed 26 gauge, which measures 0.019 inches. This thickness is typically specified in industry standards for smaller diameter piping systems, ensuring that the material is both lightweight and strong enough to handle the pressures and environmental conditions typically encountered in such applications. In this context, using 26 gauge steel might be preferred due to its balance of durability, weight, and cost-effectiveness for smaller diameter pipes. This enables the installation of connectors without unnecessary additional weight, while still maintaining sufficient structural integrity. When evaluating the other options, 24 gauge and 22 gauge, while thicker, may not be necessary for the strength requirements of pipes under 6 inches in diameter. They could add unnecessary weight and cost to the system. The thicker 16 gauge, while robust, is typically reserved for larger diameter pipes where additional strength is needed. In smaller applications, such heft is often not justified.