UL 1746-2007 钢制地下储罐外表面防腐蚀系统.pdf

UL1746 isbn0-7629-1258-8 External Corrosion Protection Systems for Steel Underground Storage Tanks UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 17 ,2007-UL 1746 Underwriters Laboratories Inc .( UL) 333 Pfingsten Road Northbrook .IL 60062-2096 UL Standard for Safety for External Corrosion Protection Systems for Steel Underground Storage Tanks UL1746 Third Edition ,Dated January 17 ,2007 SUMMARY OF TOPICS This new edition of UL 1746 is being issued to : 1 )Add polyurethane ,polyurea to the construction materials list for jacketed systems . 2 )Add increased internal fluid exposure times for the Resistance to External and Internal Fluids Test for jacketed type tanks constructed of polyurethane and polyurea materials . 3 )Revisethe construction requirements to clarify the current requirements and eliminate potential inconsistencies between UL 58 and UL 1746 by deleting duplicate requirements . 4 )Includerequirements for heating coils and hot wells 5 )Addan Indentation Test to the Part / -Coated ...