What is the wall thickness for IPS callout size 6"-9"?

For IPS (Iron PipeSize) callout sizes, wall thickness is specified based on the nominal pipe size. In the case of sizes from 6 inches to 9 inches, the nominal wall thickness is standardized to ensure compatibility with fittings and fixtures, as well as maintaining structural integrity and safe pressure ratings.

The correct answer identifies a wall thickness of 5/8 inch, which aligns with the specifications set for IPS sizes within that range. This thickness is crucial for pipes operating under certain temperatures and pressure conditions, as it provides sufficient strength and durability while minimizing weight.

In contrast, the other options suggest wall thicknesses that are either too thick or too thin for this specific range, which could compromise the pipe's function or safety standards. Understanding these measurements is vital for proper installations and applications in plumbing and industrial systems.