ANSI B16.11 applies to which components?

• A. Plastic piping systems
• B. Flanged connections only
• C. Electrical conduit fittings
• D. Forged steel fittings

Answer: (D)

ANSI B16.11 focuses on forged fittings used in piping systems, defining dimensions, tolerances, and pressure ratings for ends that are threaded, socket-weld, or butt-weld. The fittings covered are forged steel (and alloy/stainless steel) items like elbows, tees, reducers, couplings, unions, and nipples. This is why forged steel fittings are the correct choice. Plastic piping uses different standards, electrical conduit fittings are governed by other codes, and flanged connections are typically covered by other standards such as B16.5 rather than B16.11, which specifically targets forged fittings.