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): EGHXStandard Number: UL 1316Edition Date: January 7, 1994Edition Number: 2Section / Paragraph Reference: Section 14 - Physical Properties of Materials TestsS
3、ubject: Assessment of Alternate Glass FibersDECISION:Add a clarification under General Sub-Section 14.1 as follows:14.1.2 In cases where alternate glass fibers (rovings or mattes) are requested to be used within a FRPmatrix that has previously been evaluated in accordance with all applicable require
4、ments in UL1316, thefollowing steps in 14.1.2.1 to 14.1.2.4 for a comparative analysis shall be used to determine equivalencyand/or the need for additional testing:14.1.2.1. Basic material information (generic type & class, physical properties, dimensions, etc.) shall beobtained from the manufacture
5、r on the original and alternate component fiber for comparison. If the fibermaterials are in the same generic family with similar properties & dimensions, continue to 14.1.2.2,otherwise, full testing per UL1316 Sec 14 for short & long term material properties is required.14.1.2.2 Separate production
6、 samples of the complete FRP matrix using the same resin, but with originaland alternate glass fibers, shall be evaluated for glass content comparison per the UL 746A Sec 43 AshContent Test. If the glass content of the alternate FRP is within +/- 5% of the original FRP, continue to14.1.2.3, otherwis
7、e, full testing per UL1316 Sec 14 for short & long term material properties is required.14.1.2.3 Separate production samples of the FRP matrix using the same resin, but with original andalternate glass fibers, shall be evaluated for flexural strength comparison per the UL 1316 Par 14.3.1Physical Pro
8、perties Tests for ASTM D790 Flexural Strength, except 10 samples for each set of materialsbeing compared shall be tested in the as-received and after boiling (in DI water for 24 hrs) conditions.14.1.2.3.4. If the flexural modulus strength results comparing the original and alternate(s) of both befor
9、e& after retention value averages are statistically similar (using a “difference of means” calculation with a0.10 alpha significants level), the alternate glass fiber is accepted as an equivalent without additionaltesting, otherwise, full testing per UL 1316 Sec 14 for short & long term material pro
10、perties is required.RATIONALE FOR DECISION:Since UL1316 Sec 14 is intended to evaluate the completed FRP matrix (resin & fibers) and not individualcomponents, the identified analysis sequence and associated test methods have been consistentlyapplied by UL in order to determine the equivalence of alt
11、ernate glass fibers.The fiber comparison (material type, dimensions and content) is an initial equivalence measure of theoriginal vs alternate fibers within the same FRP matrix. The ASTM D790 Flexural Strength Test of physicalproperties and Difference of Means statistical analysis of both as-receive
12、d and after boiling has been theUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULbest way to compare different fibers based on established and accepted industry practice. The highernumber of test samples improves the statistical calculations, a
13、nd the sample boiling simulates expectedsoftening of the resin in the matrix related to liquid exposures over time.If both the construction and performance measures meet the high level of equivalence, and since theglass is highly resistant to chemical change and the previously tested resins have not
14、 changed, additionaltests are not necessary. This CRD does not apply to alternate resins.Copyright 2012 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
15、 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 American National Standards Institute (A
16、NSI) 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 1316 -2-
