According to ASME/ANSI B16.5, flanges from plate materials can only be used for:

According to ASME/ANSI B16.5, flanges from plate materials can only be used for:

• A. Weld flanges
• B. Slip-on flanges
• C. Blind flanges
• D. Socket weld flanges

Answer: (C)

Flanges made from plate material are flat discs without the machined hub and bore features that many flange types need to mate with a piping system. According to ASME/ANSI B16.5, plate material flanges are generally used as blind flanges because their fabrication produces a simple disk with bolt holes and no bore to connect to a pipe. This makes them ideal for sealing the end of a run, rather than forming a joint that carries the pipe’s flow or requires a bore, hub, and precise alignment. The other flange types rely on a bore that interfaces with the pipe and, often, a hub or specific seating surface, which plate material alone cannot reliably provide. So, plate-material flanges are used primarily for blind service.

Flanges made from plate material are flat discs without the machined hub and bore features that many flange types need to mate with a piping system. According to ASME/ANSI B16.5, plate material flanges are generally used as blind flanges because their fabrication produces a simple disk with bolt holes and no bore to connect to a pipe. This makes them ideal for sealing the end of a run, rather than forming a joint that carries the pipe’s flow or requires a bore, hub, and precise alignment. The other flange types rely on a bore that interfaces with the pipe and, often, a hub or specific seating surface, which plate material alone cannot reliably provide. So, plate-material flanges are used primarily for blind service.