Gas Pipe SizingCalculate the Velocity of Gas in 6" Pipeline (Pipeline Rules of Thumb Handbook)MinMaxv=1440 * Z * Q * Twhere:v =velocity of gas, ft/sec530d2 * PZ =Compressibility0.940.94Q =Volume, MMSCFHT =Operating Temperatur, R660660d =Inside diameter of pipe , inches6.1936.193P =Operating Pressure, psia600600minimum velocity should be limited to about 3 - 10 ft/s refer to API RP 14 E if there are solid particlesmaksimum velocity should be limited to acceptable noise level (60 to 80 ft/s)Q =0.128792073MMSCFH3.0885389206MMSCFDMinimumQ =0.7727524379MMSCFH18.5312335238MMSCFDMaksimumHasil perhitungan diatas menunjukan bahwa pipa 6" dapat mengalirkan gas dengan kapasitas maksimum sebesar 37 MMSCFD dan minimum sebesar 3 MMSCFDSumur Makmur #25 berada pada satu area dengan sumur-sumur makmur 1, 2, 4, 6, 17 dan 23. Sumur-sumur tersebut mempunyai zona G-50 series yang kandungan gasnya sangat potensial dan apabila ke-6 sumur tersebut zona gasnya di produksikan, maka fasilitas 6" trunkline yang diajukan akan dapat menampung gas dari ke-6 sumur tersebut.

Cover B31.8Sheet No. :1of3LINE NO:121-6-GR-CCD-XXXREV:ALEGENT:Trunkline CalculationAFE NO:08-1318DATE:05-Dec-08TABLE OF CONTENTSHal.1GENERAL DATA22Pipe Thickness Calculation30Sheet No. :2of3LINE NO:121-6-GR-CCD-XXXREV:ALEGENT:Trunkline CalculationAFE NO:08-1318DATE:05-Dec-081.GENERAL DATADesign Code=ASME B31.8Design Pressure=1350 Psi (ANSI 600)Working Allowable Pressure=675 Psi (ANSI 300)Corrosion Allowance=1.6 mmSpesific Gravity=0.85Design Temperatur=200 F = 93.33 CMATERIAL=API 5L Gr B Sch 80Basic Quality Factor For longitudinal weld joints=0.85Radiography=SpotDiameter=NPS 6Sheet No. :3of3LINE NO:121-6-GR-CCD-XXXREV:ALEGENT:Trunkline CalculationAFE NO:08-1318DATE:05-Dec-082Thickness CalculationTo determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.3, Code for pipline transportation systems, use the following :tm=t + c1 - ut=Pi do2 Smys E F Twhere :tm=minimum required thicknesst=pressure design thickness, mmc=the sum of the mechanical allowancePi=internal design pressure, Psido=outside diameter of pipe, mmSmys=Basic allowable Stres forValueF=Design FactorE'=longitudinal weld joint factorY'=T=temperature derating factorPi =1350Psido =6.625inchc =0.063inch=0.0362inch(Accumalation corrosion for 5 years operation) NORSOK-M506S' =35000PsiE' =1F =0.72u =12.5%T =1(Less than 250 F)Pipe thickness caused by pressuret=0.177inchMinimum required thicknesstm =0.316inchSch 40 for NPS 6 = 0.280 inchSch 80 for NPS 6 = 0.432 inchConclusionWe choose Sch 80 NPS 6Sheet No. :4of4LINE NO:182-8-OP-XXX-001REV:ALEGENT:Piping CalculationAFE NO:07-1304DATE:12-Sep-083Hydrostatic Test Pressure (HT) & MAOPa.Hydrostatic Test Pressure(Pht)Pht=1.25 * Design Pressure(ASME B31.4)Pht=1.25 * 1350 = 1688 PsiPipe shall be tested not less than 1688 Psib.Maximum Allowable Operating Pressure (MAOP)MAOP=2 * t * S * E * 0.72do=2 * 0.275 * 35000 * 1 * 0.726.625=1881.6(O.K at design Pressure)

Cover B31.3Sheet No. :1of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1333DATE:23-Feb-09TABLE OF CONTENTSHal.1GENERAL DATA22Pipe Thickness Calculation30Sheet No. :2of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1333DATE:23-Feb-091.GENERAL DATADesign Code=ASME B31.3Design Pressure=1350 Psi (ANSI 600)Working Allowable Pressure=675 Psi (ANSI 300)Corrosion Allowance=0.063 inchSpesific Gravity=0.85Design Temperatur=200 F = 93.33 CMATERIAL=A 106 Gr. B, SeamlessBasic Quality Factor For longitudinal weld joints=1Radiography=100%Diameter=NPS 3Sheet No. :3of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1333DATE:23-Feb-092Thickness CalculationTo determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.3, Code for pipline transportation systems, use the following :tm=t + c1 - ut=Pi do2 (S . E + Pi . Y)where :tm=minimum required thicknesst=pressure design thickness, mmc=the sum of the mechanical allowancePi=internal design pressure, Psido=outside diameter of pipe, mmS'=Basic allowable Stres forValueE'=longitudinal weld joint factorY'=Y'=coefficient having values ferritic steelsas follow0.4 up to and including 480C0.5 for 510C0.7 for 540C and aboveu=mill tolerancePi =1350Psido =3.5inchc =0.063inch=0.066inch2% of CO2 contentS' =20000PsiE' =1Y =0.4u =12.5%Pipe thickness caused by pressuret=0.115inchMinimum required thicknesstm =0.279inchSch 40 for NPS 3 = 0.216 inchSch 80 for NPS 3 = 0.300 inchConclusionWe choose Sch 80 NPS 3Sheet No. :4of4LINE NO:0REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1333DATE:23-Feb-092Diameter CalculationFlowline diameter from well to manifoldFlowline diameter from manifold to flare pitPipeline Rules of Thumb Handbook

General Data1GENERAL DATADesign Code=ASME B31.3Operating Pressure=1137 PsiWorking Allowable Pressure=1350 Psi (ANSI 600)Corrosion Allowance=0.063 inch = 1.6 mmSpesific Gravity=0.74Design Temperatur=200 F = 93.33 CMATERIAL=API 5L Gr 5 Sch 40Basic Quality Factor For longitudinal weld joints=1Radiography=SpotDiameter=NPS 4

Cover B31.4Sheet No. :1of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1306DATE:23-Feb-09TABLE OF CONTENTSHal.1GENERAL DATA22Pipe Thickness Calculation30Sheet No. :2of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1306DATE:23-Feb-091.GENERAL DATADesign Code=ASME B31.4Design Pressure=1350 Psi (ANSI 600)Working Allowable Pressure=675 Psi (ANSI 300)Corrosion Allowance=0.063 inchSpesific Gravity=0.85Design Temperatur=200 F = 93.33 CMATERIAL=API 5 L Gr.B, ERWBasic Quality Factor For longitudinal weld joints=1Radiography=100%Diameter=NPS 4Sheet No. :3of3LINE NO:REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1306DATE:23-Feb-092Thickness CalculationTo determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.4, Code for pipline transportation systems, use the following :tm = t + ct =Pi dowhere :1-u2 Smys E 0.72tm=minimum required thicknesst=pressure design thickness, mmu=mill tolerancesc=the sum of the mechanical allowancePi=internal design pressure, kPado=outside diameter of pipe, mmS'=Specific minimum yield strengthE'=longitudinal weld joint factorP=1350Psi0.5 for 510C0.7 for 540C and abovePi=1350Psido=4.5inchc=0.063inchS'=35000Psi (ASME B31.4 hal 12)E'=1(ASME B31.4 hal 12)Y'=0.40u=12.50%t =0.1205357143inch2 Smys E 0.72tm =0.209755102inchThickness 4" Sch 40 = 0.237 inchtm < tSch40The 4" Sch 40 thickness is acceptableSheet No. :4of4LINE NO:0REV:ALEGENT:Wellhead Flowline CalculationAFE NO:AFE 09-1306DATE:23-Feb-092Diameter CalculationFlowline diameter from well to manifoldFlowline diameter from manifold to flare pitPipeline Rules of Thumb Handbook

ANSI B31.3To determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.3, Code for pipline transportation systems, use the following :tm = t + c + ut =Pi do2 (S . E + Pi . Y)where :tm=minimum required thicknesst=pressure design thickness, mmc=the sum of the mechanical allowancePi=internal design pressure, kPado=outside diameter of pipe, mmS'=Basic allowable Stres forValueE'=longitudinal weld joint factorY'=coefficient having values ferritic steelsas follow0.4 up to and including 480C0.5 for 510C0.7 for 540C and abovePi =1350Psido =3.5inchc =0.02inchS' =16700PsiE' =1Y' =0.4u =12.5%tt =Pi do=0.137inch2 (S . E + Pi . Y)tm =0.174inchsch 40 for NPS 4 = 0.237and the calculation = 0.242 it shows that sch 40 is not adequateDesign thickness calculation indicates that Schedule 80 is appropriate

ANSI B31.4To determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.4, Code for pipline transportation systems, use the following :tm = t + cat =Pi dowhere :1-a2 Smys E 0.72tm=minimum required thicknesst=pressure design thickness, mma=mill tolerancese=erosion allowancec=the sum of the mechanical allowancePi=internal design pressure, kPado=outside diameter of pipe, mmS'=Specific minimum yield strengthE'=longitudinal weld joint factorY'=coefficient having values ferritic steelsas follow0.4 up to and including 480C0.5 for 510C0.7 for 540C and abovePi=1350Psido=3.5inchc=0.063inche=0.02inchS'=35000Psi (ASME B31.4 hal 12)E'=1(ASME B31.4 hal 12)Y'=0.40a=12.50%t =Pi do=0.09375inch2 Smys E 0.72tm =0.202inchThickness 4" Sch 80 = 0.337 inchThickness 4" Sch 40 = 0.237 inchThickness calculation = 0.184 inchtm < tSch40The 4" Sch 40 thickness is acceptable

ANSI B31.8To determine allowable internal working pressure for this wellhead flowline in accordance with ANSI B31.8, Code for Gas Trnamission and distribution piping systems, use the following :tm = t + ct =Pi dowhere :1-u2 Smys E F Ttm=minimum required thicknesst=pressure design thickness, mma=mill tolerancese=erosion allowancec=the sum of the mechanical allowancePi=internal design pressure, kPado=outside diameter of pipe, mmS'=Specific minimum yield strengthE'=longitudinal weld joint factorF=design factorT=temperature derating factorPi=1350Psido=6.25inchc=0.063inch=0.0362inch(Accumalation corrosion for 5 years operation) NORSOK-M506e=inchS'=20000PsiE'=1F=0.72T=1a=12.50%t =Pi do=0.29296875inch2 Smys E 0.72tm =0.4481928571inchThickness 4" Sch 80 = 0.337 inchThickness 4" Sch 40 = 0.237 inchThickness calculation = 0.184 inchtm < tSch40The 4" Sch 40 thickness is acceptable

API RP 14ETo determine internal diameter pipe for Walio pipeline in accordance with API RP 14 E (Multiphase Flow)Gas Flowrate :35.9 Mscfd=35900MscfdOperating Pressure :260PsiS1 :0.8581Sg :0.65Fluid Flowrate :200000BFPDVe=c=12409SlP + 2.7 RSgPA=9.35 + (RTZ/21.25P)198.7P + RTZVeWhere:Ve:Fluid erosional velocity, feet/secondc:empirical constant, Solid-free Fluids 100 for continuous service,125 for intermittent serviceS1:liquid specific gravitySg:gas specific gravity:Gas or liquid mixture density at flowing pressure and temperature, lbs/ft3A:minimum pipe cross sectional flow areaR:gas/liquid ratio, ft/barrel at standard conditions.0.1795scfd/bfpdT:operating temperatur, RZ:gas compressibility factorVe=100A=9.3677.313869555113.673=13.6726529296=0.685=137.0200475542inch2D=13.2116551302inchThis calculation describe that NPS 14 is appropriate

Sheet1