2The Engineering Equipment and Materials Users Association. EEMUA 159-2003 Usersr Guide to the Inspection, Maintenance and Repair of Aboveground Vertical Cylindrical Steel Storage Tanks[S]. London: Information Handling Services, 2003.
3American Petroleum Institute. API RP 575-2005 Guidelines and Methods for Inspection of Existing Atmospheric and Low pressure Storage Tanks[S]. Washington: API Publishing Services, 2005.