UL 448 2007 消防服务用离心固定泵Centrifugal Stationary Pumps for Fire-Protection Service.pdf
文档页数：24文档大小：871.12KB文档格式：pdfUL448 Centrifugal Stationary Pumpsfor Fire-Protection ServiceUL COPYRIGHTED MATERIALNOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIALNOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULjune8,2007-ul448 Underwriters Laboratories Inc .( UL) 333 Pfingsten RoadNorthbrook .60062-2096UL Standard for Safety for Centrifugal Stationary Pumps for Fire-Protection Service ,UL 448Tenth Edition ,Dated June 8 .2007SUMMARY OF TOPICSThis New Edition of ANSI /UL448 includes the following changes : Change scope section to reference centrifugal pumps for fire protection serviceClarification of which devices are required to be supplied with each pump . Revise 7.2 to indicate that provisions for feet or a fabricated support ( base)are to beprovided by the pump manufacturer . Clarification of criteria related to the construction of the discharge head for a verticalturbine pump . Clarification of which metals are accepted as being corrosion resistant without furthertesting . Clarification that the term maximum working pressure denotes the maximum pressuredeveloped at the discharge flange...
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