Laserfiche WebLink
• API 653 In-Service Inspection Report <br /> for <br /> Pacific Ethanol HMT Inspection <br /> Tank No. T-6101 August 6,2013 <br /> Stockton, CA Page 17 of 44 <br /> 4.3.4 SHELL EXTERNAL INSPECTION <br /> The external inspection interval shall be the lesser of 5 years or RCA/4N (API 653, Para. <br /> 6.3.2.1): <br /> RCA = it.,-tmin <br /> N = tprev- fact/Y <br /> 1VT= tact- tmin/4N <br /> Where: <br /> RCA= See Table = Difference between the measured shell thickness <br /> and the minimum required thickness in inches. <br /> N = See Table = Shell corrosion rate in inches per year <br /> Y= Years in service 6 <br /> 10 = See Table = Inspection interval for the next External Visual <br /> Inspection, in years(not exceeding 5 years) <br /> • Previous Current Minimum Next <br /> Thickness Measured Material Required Corrosion External Visual <br /> Course (in.) Average Loss Thickness RCA Rate Inspection <br /> No. (tw+ )* Thickness (in.) (in.) (in.) (in./yr) (years) <br /> (in.) 0.0 (M (Ir) <br /> t,r <br /> 1 0.250 0.255 0.000 0.116 0.139 0.0000 5 <br /> 2 0.250 0.255 0.000 0.102 0.154 1 0.0000 5 <br /> 3 0.187 0.187 0.001 0.100 0.087 0.0000 5 <br /> 4 0.187 0.188 0.001 0.100 0.087 0.0000 5 <br /> 5 0.187 0.191 0.000 0.100 0.091 0.0000 5 <br /> 6 0.187 0.187 0.000 0.100 0.086 0.0002 5 <br /> 7 0.187 0.189 0.000 0.100 0.088 0.0000 5 <br /> 8 0.187 0.187 0.002 0.100 0.086 0.0002 5 <br /> 9 0.187 0.192 0.000 0.100 0.091 0.0000 5 <br /> * = Original thickness data provided by client to facilitate corrosion rate calculations. <br /> REGE� <br /> APIRPTNEAOT REV 2 23262868/Tfi101r(2) 1 3 .1 14 <br /> ENVIRONMEN'l4a ri",h H <br /> DEPARTMP-:(J <br />