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): EAZXStandard Number: UL 651BEdition Date: August 29, 2007Edition Number: 2Section / Paragraph Reference: Table 11.1 and Table 13.1Subject: Crush load value a
3、nd mandrel diameter value for 2-1/2 trade sizeDECISION:Table 11.1Load for crush testTrade size (Metric designator) Load for a 6-inch (152-mm) specimenPercentagealbf N1/2 16 70 950 42253/4 21 70 750 33361 27 70 650 28901-1/4 35 75 500 22241-1/2 41 75 400 17802 53 75 300 13342-1/2 63 75 b 400 b 17803
4、78 75 500 22243-1/2 91 75 b b4 103 75 350 15575 129 b b b6 155 b b baThe number in this column is the percentage of its original length to which the minor axis of the loaded specimen can bereduced by the load and still be in compliance with the requirements.bTo be developedUL COPYRIGHTED MATERIAL NO
5、T AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 13.1Moisture penetration mandrel diameterTrade size (Metric designator) Mandrel diameter,inches mm1/2 16 6.5 1653/4 21 8.5 2161 27 13.0 3301-1/4 25 16.0 4061-1/2 41 18.0 4572 53 22.2 5642-1/2 6 63 155 63 a 22.1 a 56
6、136 78 155 a aaTo be developedRATIONALE FOR DECISION:Crush load values were developed for the 2-1/2 trade size High-density PE conduit based on anevaluation of the conduit.Mandrel diameter values were developed for the 2-1/2 trade size High-density PE conduit based on anevaluation of the conduit.Cop
7、yright 2011 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, 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 t
8、he opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. 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 Certifi
9、cation 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 651B -2-
