UL 21-2006 液化石油气软管标准.pdf

UL 21 sb1-55989-849-6 LP-Gas Hose This PDF Standard downloaded from . . OCTOBER 9 ,2006-UL 21 Underwriters Laboratories Inc .( UL) 333 Pfingsten Road Northbrook ,60062-2096 UL Standard for Safety for LP-Gas Hose ,UL 21 Ninth Edition ,Dated June 1 .1995 Revisions :This Standard contains revisions through and including October 9 ,2006 Summary of Topics Revision pages have been issued for the Standard for LP-Gas Hose ,UL 21 ,to revise the title page to reflect that the Standard is no longer ANSI approved . UL Standards for Safety are developed and maintained in the Standard Generalized Markup Language ( SGML).SGML- -an international standard ( 8879-1986 )--is a descriptive markup language that describes a document's structure and purpose ,rather than its physical appearance on a page .Due to formatting differences resulting from the use of UL's new electronic publishing system ,please note that additional pages ( onwhich no requirements have been changed )may be included revision pages due to relocation of existing text and reformatting of the Standard Text that has been changed in any manner marked with vertical line in the margin . The revisions dated Oct...