UL 1777-2009 Standard for Safety for Chimney Liners.pdf
文档页数：62文档大小：1021.81KB文档格式：pdfUL UL1777 ⑧ Underwriters Laboratories Inc . Standard for SafetyChimney Linersjuly3,2009-ul1777 Underwriters Laboratories Inc .( UL) 333 Pfingsten RoadNorthbrook .IL 60062-2096UL Standard for Safety for Chimney Liners ,UL 1777Fourth Edition .Dated November 9 ,2007Revisions :This Standard contains revisions through and including July 3 ,2009Summary of TopicsThese revisions of ANSI /UL1777 include changes to the strength requirements :specifying thatLoading Test for Metallic Chimney Liners ,Section 23 ,does not apply to corrugated liners ; reducing loading tests of liners for gas-fueled appliances from 200 to 100 pounds ;andspecifying that a liner intended for venting gas-fueled only appliances is not subject to thesweep test .1.5 has also been added to show that cement and refractory liners are to be testedto temperatures suitable for solid-fuelsText that has been changed in any manner is marked with a vertical line in the margin .Changes inrequirements are marked with a vertical line in the margin and are followed by an effective date noteindicating the date of publication or the date on which the changed requirement bees effective . The requirements...
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