Which standard covers socket-type CPVC fittings, Schedule 80?

• A. ASTM F 439 Socket-type CPVC fittings, Schedule 80
• B. ASTM F 438 Socket-type CPVC fittings
• C. ASTM F 437 Standard for CPVC plastic pipe fittings
• D. ASME B16.11 Standard for forged fittings, socket-welding and threaded

Answer: (A)

The key idea here is that CPVC fittings come with standards that depend on both the connection type and the pipe’s pressure rating. For socket-type CPVC fittings that are used with Schedule 80 pipe, the standard that defines those fittings is the one that explicitly specifies Schedule 80 in its scope. That standard sets the dimensions, material quality, and performance requirements to ensure a proper fit and reliable joint for Schedule 80 CPVC pipe.

Knowing this helps you see why the other options don’t fit: some standards cover CPVC fittings in general or socket-type fittings without specifying a schedule, and one option is for metal fittings altogether. The Schedule 80 designation is what ties the standard specifically to higher-wall-thickness CPVC pipe, and the standard name that addresses socket-type CPVC fittings at Schedule 80 is ASTM F439.