Which standard defines socket-type CPVC plastic pipe fittings?

Which standard defines socket-type CPVC plastic pipe fittings?

• A. ASME B16.3
• B. ASTM F 439
• C. ASTM F 438
• D. NFPA 251

Answer: (B)

ASTM F439 is the standard that defines socket-type CPVC plastic pipe fittings. It specifies the requirements for CPVC solvent-weld fittings designed to receive the CPVC pipe in a socket joint, covering aspects like dimensions, materials, and performance under normal use with both hot and cold water systems. This ensures the fittings consistently mate with CPVC pipe and provide reliable, leak-free joints when installed with solvent cement. The other standards map to different categories—ASME B16.3 is for threaded metal pipe fittings, NFPA 251 covers fire resistance testing for building construction, and the remaining CPVC-related standard does not define socket-type fittings—so they don’t govern socket-type CPVC fittings.

ASTM F439 is the standard that defines socket-type CPVC plastic pipe fittings. It specifies the requirements for CPVC solvent-weld fittings designed to receive the CPVC pipe in a socket joint, covering aspects like dimensions, materials, and performance under normal use with both hot and cold water systems. This ensures the fittings consistently mate with CPVC pipe and provide reliable, leak-free joints when installed with solvent cement. The other standards map to different categories—ASME B16.3 is for threaded metal pipe fittings, NFPA 251 covers fire resistance testing for building construction, and the remaining CPVC-related standard does not define socket-type fittings—so they don’t govern socket-type CPVC fittings.