MECHANICAL DESIGN CALCULATIONS FOR LOX BACKUP VAPORIZER LIKE TO LIKE SHELL REPLACEMENT OF LOX 110-EX-062 A/B PV Elite 2014 Licensee: DOHA PET. CONST. CO. LTD., QATAR FileName : VEN-28442-LOX-5-12-0001 Rev Internal Pressure Calculations : Step: 3 2:10p Dec 10,2014

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Element Thickness, Pressure, Diameter and Allowable Stress : | | Int. Press | Nominal | Total Corr| Element | Allowable | From| To | + Liq. Hd | Thickness | Allowance | Diameter | Stress(SE)| | | MPa | mm | mm | mm | MPa | --------------------------------------------------------------------------- 10| 20| 0.1214 | 8.0000 | ... | 2134.0 | 115.15 | 20| 60| 0.1214 | 12.000 | ... | 2134.0 | 97.875 | 60| 90| 0.1214 | 6.0000 | ... | 2134.0 | 97.875 | 90| 100| 0.1214 | 12.000 | ... | 2134.0 | 97.875 | 100| 120| 0.1214 | 8.0000 | ... | 2134.0 | 115.15 | Element Required Thickness and MAWP : | | Design | M.A.W.P. | M.A.P. | Minimum | Required | From| To | Pressure | Corroded | New & Cold | Thickness | Thickness | | | MPa | MPa | MPa | mm | mm | ---------------------------------------------------------------------------- 10| 20| 0.10342 | 0.63285 | 0.65079 | 6.00000 | 1.50000 | 20| 60| 0.10342 | 1.08778 | 1.10572 | 12.0000 | 1.50000 | 60| 90| 0.10342 | 0.53367 | 0.55161 | 6.00000 | 1.50000 | 90| 100| 0.10342 | 1.08778 | 1.10572 | 12.0000 | 1.50000 | 100| 120| 0.10342 | 0.63285 | 0.65079 | 6.00000 | 1.50000 | Minimum 0.103 0.552 MAWP: 0.103 MPa , limited by: DESIGN (user specified) Internal Pressure Calculation Results : ASME Code, Section VIII, Division 1, 2013 Elliptical Head From 10 To 20 SA-240 304L at 110 C Longitudinal Joint: Full Radiography per UW-11(a) Type 1 Circumferential Joint: Full Radiography per UW-11(a) Type 1 Material UNS Number: S30403 Required Thickness due to Internal Pressure [tr]: = (P*Do*Kcor)/(2*S*E+2*P*(Kcor-0.1)) per Appendix 1-4 (c) = (0.121*2134.0000*1.000)/(2*115.15*1.00+2*0.121*(1.000-0.1)) = 1.1235 + 0.0000 = 1.1235 mm Note: The thickness required was less than the Code Minimum, therefore the Code Minimum value of 1.5000 mm per UG-16 will be used. Max. Allowable Working Pressure at given Thickness, corroded [MAWP]: Less Operating Hydrostatic Head Pressure of 0.018 MPa = (2*S*E*t)/(Kcor*Do-2*t*(Kcor-0.1)) per Appendix 1-4 (c) = (2*115.15*1.00*6.0000)/(1.000*2134.0000-2*6.0000*(1.00-0.1)) = 0.651 - 0.018 = 0.633 MPa Maximum Allowable Pressure, New and Cold [MAPNC]:

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