Pipe Calculation

For Pipe 8 " Sch 30 of piping class 11025 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 106 Gr B = 8 inch = 30

= 7 mm (from Pipe Schedule) Tolerance Wall Thickness = 0.9 mm (need to refer ASTM) Nominal Outside Diameter, D = 219.1 mm Internal Design Pressure, P = 19.6 barg Design Temperature, T = 0.0 °C Corrosion Allowance, c = 3.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 1.55 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 5.4 mm SATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 8 " Sch 30 of piping class 11025 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 106 Gr B = 8 inch = 30

= 7 mm (from Pipe Schedule) Tolerance Wall Thickness = 0.9 mm (need to refer ASTM) Nominal Outside Diameter, D = 219.1 mm Internal Design Pressure, P = 29.4 barg 1.5 x Rating pressure (19.6 barg) Design Temperature, T = 0.0 °C Corrosion Allowance, c = 3.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 2.32 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 6.2 mm SATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20" Sch 30 of piping class 31013 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 106 Gr B = 20 inch = 30

= 12.7 mm (from Pipe Schedule) Tolerance Wall Thickness = 1.6 mm (need to refer ASTM) Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 50.5 barg Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 9.17 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 11.8 mm SATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20" Sch 30 of piping class 31013 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 106 Gr B = 20 inch = 30

= 12.7 mm (from Pipe Schedule) Tolerance Wall Thickness = 1.6 mm (need to refer ASTM) Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 75.8 barg 1.5 x Rating pressure (50.5 barg) Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 13.65 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 16.2 mm UNSATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20 " Sch 80 of piping class 61142 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 333 Gr 6 = 20 inch = 80

= 26.19 mm (from Pipe Schedule) Tolerance Wall Thickness = 3.3 mm (need to refer ASTM) Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 102.1 barg Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 18.27 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 22.5 mm SATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20 " Sch 80 of piping class 61142 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 333 Gr 6 = 20 inch = 80

= 26.19 mm (from Pipe Schedule) Tolerance Wall Thickness = 3.3 mm (need to refer ASTM) Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 153.2 barg 1.5 x Rating pressure (102.1 barg) Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa (from Appendix A-1 of ASME B31.3) Logitudinal Weld Efficiency, E = 1.00 (from Appendix A-1B of ASME B31.3) For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 (from table 304.1.1 of ASME B31.3) Pressure Design Thickness, t = PD/2(SE + PY) (from 304.1.2 Eq. (a) of ASME B31.3) = 27.01 mm Minimum Required Thickness, tm= t + c + Mill tolerance (from 304.1.1 Eq. (2) of ASME B31.3) = 31.3 mm UNSATISFACTORY Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20 " Sch 120 of piping class 91013 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 333 Gr 6 = 20 inch = 120

= 38.1 mm Tolerance Wall Thickness = 4.8 mm Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 153.2 barg Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa Logitudinal Weld Efficiency, E = 1.00 For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 Pressure Design Thickness, t = PD/2(SE + PY) = 27.02 mm Minimum Required Thickness, tm= t + c = 28.0 mm

(from Pipe Schedule) (need to refer ASTM)

(from Appendix A-1 of ASME B31.3) (from Appendix A-1B of ASME B31.3) (from table 304.1.1 of ASME B31.3) (from 304.1.2 Eq. (a) of ASME B31.3) (from 304.1.1 Eq. (2) of ASME B31.3) SATISFACTORY

Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

For Pipe 20 " Sch 120 of piping class 91013 DESIGN CODE: ASME B31.3 PROCESS PIPING - FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE Material Pipe size Pipe schedule Pipe Wall Thickness, tn

=A 333 Gr 6 = 20 inch = 120

= 38.1 mm Tolerance Wall Thickness = 4.8 mm Nominal Outside Diameter, D = 508.0 mm Internal Design Pressure, P = 229.8 barg Design Temperature, T = 0.0 °C Corrosion Allowance, c = 1.0 mm Basic Allowable Stress, S = 137.9 MPa Logitudinal Weld Efficiency, E = 1.00 For Longitudinal Weld Joints Value of Coefficient, Y (t < D/6) = 0.4 Pressure Design Thickness, t = PD/2(SE + PY) = 39.68 mm Minimum Required Thickness, tm= t + c = 40.7 mm

(from Pipe Schedule) (need to refer ASTM) 1.5 x Rating pressure (153.2 barg)

(from Appendix A-1 of ASME B31.3) (from Appendix A-1B of ASME B31.3) (from table 304.1.1 of ASME B31.3) (from 304.1.2 Eq. (a) of ASME B31.3) (from 304.1.1 Eq. (2) of ASME B31.3) UNSATISFACTORY

Can used PTS 31.38.01.11 (Appendix 14) for double checking (ASTM 106 Gr B and API Gr B only)

REFERENCE: API 570 PIPING INSPECTION CODE Actual Thickness, tactual

= Required Thickness, trequired = Wall Thickness, tinitial or tpervious= Year in Service Corrosion Rate, Cr Remaining Life

2.7 mm 2.44 mm

(from pressure design thickness calculation)

6.23 mm = 15 year(s) = (tinitial - tactual)/time(year) between or (tprevious - tactual)/time(year) between) = 0.24 mm/year = (tactual - trequired)/corrosion rate = 1.10 year(s)

(from 7.1.1 Remaining Life Calculations of API 570) (from 7.1.1 Remaining Life Calculations of API 570)

REFERENCE: API 570 PIPING INSPECTION CODE & API 579 FITNESS FOR SERVICE CALCULATION OF MAXIMUM ALLOWABLE WORKING PRESSURE FOR PIPING IN OPERATIONS Design Pressure, P = 1765 kPA Design Temperature, P = 80 °C Material = API 5L Gr B Pipe size = 12 inch Pipe schedule = STD Allowable Stress, S = 137900 kPA Nominal Outside Diameter, D= 323.9 mm Logitudinal Weld Efficiency, E= 1.00 (from Appendix A-1B of ASME B31.3) Actual Thickness, tactual = 2.70 mm Corrosion Rate, Cr = 0.24 mm/year Next Planned Inspection = 2 year(s) 2SEΤ/D MAWP = = 1481.6 kPA UNSATISFACTORY