Cathodic Protection DesignProject Name: Input DataPipe Outside Dimater Do36Corrosion Coating Thickness tcor0.025Pipe J oint Length Lj40Pipeline Total Length Ltot34121Design Life of Pipeline tf25Pipe Embedded Ratio Rembed0.33Anode Thickness tan2.402Anode Straight Length Lan_str15.354Anoded Tapered Length Lan_tpr0.00Constant "a" Factor for Pipeline [Ref.1, Table A-1] apl0.01Constant "b" Factor for Pipeline [Ref.1, Table A-1] bpl0.0003Constant "a" Factor for FJ C [Ref.1, Table A-2] afjc0.3Constant "b" Factor for FJ C [Ref.1, Table A-2] bfjc0.03Mean Current Density [Ref.1, Table 5-1] icm 0.062Anode Electro Chemcial Capacity - Seawater [Ref.2, Table 5] sea 12801Anode ElectroCapacity - Saline Mud [Ref.2, Table 5] mud 5501Anode Material Weight Density an 1653Driving Potential Edriving0.25Anode Resistivity -Seawater Rsea 0.656Anode Resistivity -Saline Mud Rmud 3.281Utilization Factor UF 0.8Ref.1 "DNV-RP-F103 Cathodic Protection of Submarine Pipelines by Glavanic Anodes", 2010, Det NorskeVeritasRef.2 "ISO -15589-2 Petroleum, Petrochemical and Natural Gas Industries - Cathodic Protection of Pipeline Transportation Systems" Part 2: Offshore PipelinesCathodic Protection DesignOutput DataMean Coating Breakdown [Ref.1, Sec 5.2.6] fcm+ + apl 0.5 bpl tf 0.033 + afjc 0.5 bfjc tf = fcm0.036Final Coating Breakdown[Ref.1, Sec 5.3.2] fcf+ + apl bpl tf 0.033 + afjc bfjc tf = fcf0.052Weight Required per Mile Wreq tfDo fcm icm UF + Rembed mud 1 Rembed sea= Wreq2634.36 Current Required per Mile Ireq Do fcf icm= Ireq14.47 Anode Inside Diameter Dia+ Do2 tcor= Dia36.05Anode Outside Diameter Doa+ + Do2 tcor2 tan= Doa40.85Anode Section Area Aan 4Doa2Dia2= Aan290.162Anode Surface Area per Anode Aaf + Doa2Dia2 Lan_str 0.9 = Aaf1669.292Anode Resistance Raf 0.315 + Rembed Rmud 1 Rembed RseaAaf= Raf0.14Final Anode Current Output per Anode IafEdrivingRaf= Iaf1.78Weight per Anode Wan Aan an UF + Lan_strLan_tpr= Wan340.32Anode Required per Mile (Based on Weight) Nan_1WreqWan= Nan_17.74 1Anode Required per Mile (Based on Current) Nan_2IreqIaf= Nan_28.15 1Cathodic Protection DesignAnode Spacing along the Pipeline Nan1max, Nan_1 Nan_2= Nan647.92Anode Spacing (J oing) Spacing floorNanLj= Spacing 16Required Number of Anodes NtotLtotLjSpacing= Ntot53.31Total Weight of Anodes Wtot Wan Ntot= Wtot18144.1