COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

American Biodiesel nA%j Silo S-1 Stockton,CA g ^?= Out of Service Inspection 5.0 Calculations 5.1 Minimum Thickness Calculations - One Foot Method The minimum acceptable shell plate thickness for tank with a diameter equal to or less than 200 feet is calculated as follows: 2.6(H—1)DG train — SE Reference API-653, 3rd Edition,Addendum 1, September 2003, Paragraph 4.3.3.1 D H S Minimum t.,,, Course Tank Product Allowable E G Actual Required Height Diameter Height Stress Joint Specific Thickness Thickness Course (ft.) (ft.) (ft.) (psi) Efficiency Gravity (in.) (in.) Result 3 10 14 10 26,000 0.70 1.00 0.219 0.100 PASS 2 8 14 18 23,600 0.70 1.00 0.227 0.100 PASS 1 Cone 10 14 28 23,600 0.70 1.00 0.227 0.100 PASS Per API-653 4.3.3.1, the minimum allowable shell plate thickness shall not be less than 0.100 inches. Using the shell thickness measurements obtained during this inspection, the shell thickness calculations indicate that the maximum fill height of 28.00 feet can be utilized with product specific gravity up to 1.00. Please note that these calculations do not take into consideration operational restrictions imposed by such items as a floating roof, overflow lines, high level alarm or vents and seals. These items will need to be taken into consideration when calculating the actual safe fill height. 5.2 Allowable Hydrostatic Test Height H — St Etmin + 1 Ht 2.6D Reference API-653, 3rd Edition,Addendum 1, September 2003, Paragraph 4.3.3.2 Ht D St tm,„ Calculated Tank Allowable E Required Hydrotest Diameter Hydrostatic Joint Thickness Height Course (ft.) Stress Efficiency (in.) (ft.) 3 14 27,000 0.70 0.100 52.92 2 14 26,000 0.70 0.100 51.00 1 Cone 14 26,000 0.70 0.100 51.00 Report Date Petroleum&Refractory, Inc. Page 8 of 21 March 6,2007 TankReporter 13.91