Laserfiche WebLink
• API 653 In-Service Inspection Report <br /> for <br /> Pacific Ethanol HMT Inspection <br /> Tank No. T-6102 August 6,2013 <br /> Stockton, CA Page 15 of 46 <br /> 4.3.2 SHELL THICKNESS CALCULATIONS <br /> The minimum acceptable shell plate thickness for tanks with a diameter equal to or less <br /> than two hundred (200)feet is calculated as follows(ref. API 653, Para. 4.3.3.1): <br /> t min <br /> 2.6(H—1)DG <br /> = <br /> SE <br /> Where: <br /> S = See Table = Allowable Stress (psi) <br /> D = 30.00 ft. = Nominal Diameter of Tank(ft.) <br /> G = 1.00 = Highest Specific Gravity of Contents <br /> H= See Table = Product Height(ft.) <br /> E = See Table = Joint Efficiency <br /> • Course Product Allowable Average Required <br /> Joint <br /> Height Height Stress Thickness Thickness <br /> Course in. ft. Efficient si in. in. <br /> 1 48 36.00 0.70 23,600 0.257 0.165 <br /> 2 48 32.00 0.70 23,600 0.254 0.146 <br /> 3 48 28.00 0.70 26,000 0.188 0.116 <br /> 4 48 24.00 0.70 26,000 0.188 0.100 <br /> 5 48 20.00 0.70 26,000 0.191 0.100 <br /> 6 48 16.00 0.70 26,000 0.187 0.100 <br /> 7 48 12.00 0.70 26,000 0.188 0.100 <br /> 8 48 8.00 0.70 26,000 0.191 0.100 <br /> 9 48 4.00 0.70 26,000 0.190 0.100 <br /> Shell thickness calculations indicate the safe fill height of 36.0 feet can be utilized with <br /> product specific gravities up to 1.000. The hydrostatic test height can, therefore, utilize <br /> this maximum fill height (ref. API 653, Para. 4.3.3.2). These calculations do not take into <br /> account operational restrictions from such items as the high-level alarms or owner / <br /> operator-imposed safe fill restrictions. <br /> RECEIVE <br /> ,AUG 14 2014 <br /> APIRPTNE.DOT REV 2 2=8881r�102r(Rev 1) F—lqVIH0NMPRFAt0FVEALTH <br /> DEPARTMENT <br />