1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): VTSRStandard Number: UL 668Standard Title: Standard for Hose Valves for Fire-Protection ServiceEdition Date: April 28, 2004Edition Number: 10Section / Paragr
3、aph Reference: 11 and 12Subject: Inlets and OutletsDECISION:Valves may use grooved inlets in accordance with AWWA C600 or alternative threads on inlets andoutlets provided that the threads comply with a nationally recognized standard.11 Inlets Threads and Attachment Means11.1 A hose valve intended f
4、or use on a fire pump and a standpipe shall be fitted at the inlet end with oneof the following:a) fFemale pipe threads complying with ANSI/ASME B1.20.1, Pipe Threads, General Purpose(Inch)b) Grooved ends complying with the Standard for Grooved and Shouldered Joints, ANSI/AWWAC600c) Pipe threads com
5、plying with a national standard that applies where the valve is intended tobe installed.11.2 A hydrant hose valve shall be constructed to attach to hydrant barrels by use of two 3/4 inch (19.1mm) tap bolts, spaced horizontally 5-5/8 inches (143 mm) on centers. A hydrant hose valve shall bepermitted
6、to attach to hydrant barrels using a flange complying with a national standard that applies wherethe valve is to be installed.12 Outlet Nipples and Threads12.1 A hose valve outlet shall be threaded in accordance with the Standard for Fire Hose Connections,NFPA 1963, unless otherwise specifically ord
7、ered to fit existing equipment. The outlet end shall beprovided with at least four full threads. Outlets shall be permitted to use threads complying with aspecification where the valve is intended to be installed.12.2 The outer end of external (male) and internal (female) threads other than taper pi
8、pe threadsANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch) shall be terminated by the Higbee Cut tofacilitate coupling and to avoid crossing and mutilation of thread.12.3 A hose nipple shall be made of brass, bronze, or other equivalent corrosion resistant material.UL COPYRIGHTED MATERIAL NOT
9、 AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATIONALE FOR DECISION:The 10thedition of UL 668 requires inlets and outlets to comply with the standards referenced in sections11 and 12 respectively. This Certification Requirement Decision will allow for grooved inlets
10、andalternative thread types where the valve is used in areas with nationally recognized standards specifyingdifferent threading.Copyright 2015 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certificatio
11、n Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under A
12、merican National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 668 -2-
