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): HMRZ, HMRZ2, HDLNStandard Number: UL 262Standard Title: Standard for Gate Valves for Fire-Protection ServiceEdition Date: February 26, 2004Edition Number: 8S
3、ection / Paragraph Reference: 7.5Subject: End ConnectionsDECISION:7.5 The dimensions of all flanges, flange pipe joints, grooves, and threaded body openings shall conformto the following standards, as applicable or to other national standards that apply where the valve isintended to be installed:a)
4、Fittings,348inches, (76.2 1219 mm) for Water and Other Liquids, Gray Iron and DuctileIron, ANSI/AWWA C110/A21.10.b) Rubber Gasket Joints for Ductile-Iron and Gray-Iron Pressure Pipe and Fittings, ANSI/AWWAC111/A21.11.c) Cast Iron Pipe Flanges and Flanged Fittings, Class 25, 125, 250, and 800, ANSI/A
5、SMEB16.1.d) Forged Steel Fittings, Socket Welding and Threaded, ANSI/ASME B16.11.e) Steel Pipe Flanges for Waterworks Service, 4 144 Inches (101.6 3657.6 mm), ANSI/AWWA C207, for valves having a maximum rated pressure of 175 psig (1206 kPa); PipeFlanges and Flanged Fittings, Steel Nickel Alloy and O
6、ther Special Alloys, ANSI/ASME B16.5,for valves having a maximum rated pressure greater than 175 psig (1206 kPa).RATIONALE FOR DECISION:The 8thedition of UL 262 requires end connections to comply with the standards referenced in section 7.5.This Certification Requirement Decision will allow for alte
7、rnative end connections where the valve is usedin a country with a nationally recognized standard. This is also consistent with requirements of UL 1091 Butterfly Valves For Fire Protection Service.Copyright 2015 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its obj
8、ectives, does not guarantee or warrant thecorrectness of Certification 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
9、. They do not represent formal interpretations of thestandard under American 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 incurUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
10、 FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULany 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 262 -2-
