UL 393 PDF

Indicating Pressure Gauges for Fire-Protection Service

UL 393

1 Scope

1.1 These requirements cover indicating pressure gauges of the elastic element type intended for use with sprinkler or standpipe equipment for fire-protection service.

1.2 These requirements cover gauges of trade sizes 3-1/2 to 4-1/2 inches (90 to 115 mm), inclusive.

1.3 The gauges covered by these requirements are intended for installation and use according to the following Standards of the National Fire Protection Association:

a)    Standard for Installation of Sprinkler Systems, NFPA 13;

b)    Standard for Installation of Standpipe and Hose Systems, NFPA 14;

c)    Standard for Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24; and

d)    Standard for Installation of Stationary Fire Pumps for Fire Protection, NFPA 20.

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Indicating Pressure Gauges for Fire-Protection Service, UL 393, are included in these revisions:

1. Additional dial pressure range for Table 7.1