Listed Valves per NFPA 20

[QC1971]

Does NFPA 20 require that all valves be listed valves or just the valves that it specifically states the requirement of a listed valve?

 

[stookeyfpe]

Based on my review of NFPA 20, just the valves that are required to be listed. These are the suction and discharge isolation valves, automatic relief valve, discharge check valve or backlfow preventer, bypass isolation valve and hose valves on the pump test header.

If the pump uses a diesel driver, NFPA 30 does give the AHJ the latitude to require listed valves for the diesel fuel piping.

 

[firesystem]

i can not find 2pcs check valve 12inch diameter, flage end ANSI 150#,as specified on NFPA 20 (5.16.6). The body can be A216WCB but internal should be for seawater service.

 

[cdafd]

firesystem

Which edition of nfpa 20 are you looking at and what is the heading of the section