What does the number 2 indicate on a spiral round gasket?

• A. Material type
• B. Size
• C. Temperature rating
• D. Pressure rating

Answer: (B)

The number 2 on a spiral round gasket typically indicates the size of the gasket. Gaskets are sized based on the dimensions they need to fit within the piping system, and this numerical indication helps in identifying the correct diameter or width for installation. Proper sizing is crucial for achieving an effective seal between pipe flanges, as a mismatch in size can lead to leaks or failures in the system.

In the context of gaskets, material type, temperature rating, and pressure rating refer to different aspects of the gasket's specifications and performance capabilities, which are not indicated by the numerical size designation. Understanding the relationship between gasket numbers and their sizes is vital for proper application in pipefitting.