ul 1746-2007 鋼制地下儲罐外表面防腐蝕系統(tǒng)

1、UL COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL 1746ISBN 0-7629-1258-8External Corrosion Protection Systems for Steel Underground Storage Tankswww.bzfxw.comU

2、L COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL) 333 Pfingsten Road Northbrook, IL 60062-2096UL Standard for Safety for Extern

3、al Corrosion Protection Systems for Steel Underground Storage Tanks, UL 1746Third Edition, Dated January 17, 2007SUMMARY OF TOPICSThis new edition of UL 1746 is being issued to:1) Add polyurethane, polyurea to the constr

4、uction 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

5、.3) Revise the construction requirements to clarify the current requirements and eliminate potential inconsistencies between UL 58 and UL 1746 by deleting duplicate requirements.4) Include requirements for heating coils

6、and hot wells.5) Add an Indentation Test to the Part IV – Coated Tank requirements.6) Revise the test potential for the Holiday Tests.7) Clarify the test acceptance criteria for the Tank Examination and Holiday Tests for

7、 jacketed type tanks.8) Revise the Manufacturing and Production Leakage Test.9) Replace the term “clad” with the term “coated”.10) Clarify the test methods that use the solutions listed in Tables 21.1, 25.1, and 28.3 by

8、revising the title.11) Delete the term “base” from the term “base tank”.12) For composite and coated type tanks revise the Permeance/Cladding Dissolution Test title to Permeation/Coating Dissolution Test and correct the

9、references to these tests.13) For the permeation dissolution testing for jacketed type tanks provide consistent references to the Permeation/Jacket Dissolution Test.14) Revise the terminology in the standard to indicate

10、a steel tank protected by cathodes is a cathodically protected tank.15) Add the number of locations that the thickness of a composite material is to be measured during the Permeation/Coating Dissolution Test for composit