Client/Subject: AngloAmerican Page : 1 of 2

Site: Mogalakwena Rev : 01

System: Air Reciever - ILP3918 Contract No: MGM-ENG-PRJ-00003
Wall Thickness Calculation Discipline : Mechanical
Calculation Number: AGL-MGM-18-02-ENC-00001 Doc No: AGL-MGM-18-02-ENC-00001
Calculations by : S. Zikalala Date : 17/05/2023
Shell Thickness Under Internal Pressure
Source Description

ASME Sec VIII Div 1 UG-27 SHELL THICKNESS Material Matric

Design Pressure P = 1200 kPa
Dessign Temperature T = 60 °C
Shell Outer Diameter D = 1200 mm
Outer Radius of shell Ro = 600 mm
Measured Wall Thickness of Shell ts = 8 mm
Measured Wall Thickness of Dish td = 6.8 mm
ASME Sec.II Part D Table Max Allowable Stress for Shell Material A516 Gr 70 Ss 138000 kPa
1A/A1-M Max Allowable Stress for Dish Material A516 Gr 70 Sd 138000 kPa
Crown Radius L = 1820 mm
Knuckle Radius r = 375 mm
Joint Efficiency Dish Ed = 1.00
Joint Efficiency Shell Es = 1.00

Cicumferential Stress Minimum Required Thickness of Shell ts = 5.20 mm

Corrosion Allowance c = 1.50 mm
Thickness of Shell with corrosion allowance = 6.70 mm
Actual Thickness is: ta = 8 mm
Concluson: Thickness is sufficient

Allowable Pressure Allowable for Actual Thickness Pall = 1849.87 kPa

Conclusion: At the measured wall thickness the vessel shall not be operated above 1849kPa
Dish Thickness Under Internal Pressure
Source Description

ASME Sec VIII Div 1 UG-32 THICKNESS OF ELLIPSOIDAL DISH Td = 5.18 mm

Table 1-4.1 Factor K K = 1.00

Add Thinning Allowances 0.00 mm
Add Corrosion Allowances 1.50 mm
Nominal Thickness of Dish 6.68 mm
Actual Thickness is: 6.8 mm
Conclusion: Thickness is Sufficient

Allowable Pressure Allowable for Actual Thickness Pall = 1580.12 kPa

Conclusion: At the measured wall thickness the vessel shall not be operated above 1580kPa
 Client/Subject: AngloAmerican Page : 2 of 2
Site: Mogalakwena Rev : 01
System: Air Reciever - ILP3918 Contract No: MGM-ENG-PRJ-00003
Wall Thickness Calculation Discipline : Mechanical
Calculation Number: AGL-MGM-18-02-ENC-00001 Doc No: AGL-MGM-18-02-ENC-00001
Calculations by : S. Zikalala Date : 17/05/2023
Vessel Nozzle Under Internal Pressure
Source Description
DN450 MANHOLE AND INSPECTION OPENING Material Metric
Design Pressure P = 1200 kPa
Design Temperature T = 60 °C
Nozzle Diameter D = 457 mm
Nozzle OuterRadius R = 228.5 mm
Wall Thickness of Nozzle tN = TBC mm
ASME Sec.II Part D Table
1A/A1-M Max Allowable Stress for Nozzle Material A106 Gr B S = 118000 kPa
Joint Efficiency E = 1.00

ASME Sec VIII Div 1

Appendix 1-1(a) Calculated Thickness of Nozzle Neck t = 2.31 mm
Corrosion Allowance c = 0.00 mm
Required Nozzle Thickness with Corrosion Allowance ta = 2.31 mm
Concluson: The Manway nozzle neck thickness shall be no less then 2.31mm
DN100 NOZZLE OPENING Material Metric
Design Pressure P = 1200 kPa
Design Temperature T = 60 °C
Nozzle Diameter D = 60.3 mm
Nozzle Inner Radius R = 30.15 mm
Wall Thickness of Nozzle tN = 8.74 mm
ASME Sec.II Part D Table
1A/A1-M Max Allowable Stress for Nozzle Material A106 Gr B S = 118000 kPa
Joint Efficiency E = 1.00

ASME Sec VIII Div 1

Appendix 1-1(a) Calculated Thickness of Nozzle Neck t = 0.31 mm
Corrosion Allowance c = 1.50 mm
Thickness of Nozzle with Corrosion Allowance ta = 1.81 mm

ASME Sec VIII Div 1 UG-16 Minimum Thickness as per UG-16(b) t16b = 2.50 mm
Incuding Corrosion Allowance = 4.00 mm
Minimum Required Thickness at Nozzle Location tr = 10.32 mm
Required Vessel Thickness at Nozzle Location tb1 = 10.32
Minimum thickness as per Table UG-45
ASME Sec VIII Div 1 UG-45 tb3 = 5.27 mm
Incuding Corrosion Allowance = 6.77 mm

tb = 4.00 mm

Required Minimum Nozzle Neck

Wall Thickness with Corrosion Allowance tUG-45 = 4.00 mm
Concluson: The nozzle neck thickness shall be no less then 4mm
Check For Reinforcement Requirements
Source Description
DN100 OPENING
Opening Inner Diameter d = 42.82 mm
ASME Sec VIII Div 1 UG-37 Pressure Correction Factor F = 1 -
Vesssel Actual Thickness t = 8 mm
Required Thickness of Shell tr = 6.70 mm
Internal Projection Nozzle Thickness ti = 0 mm
Actual Nozzle Thickness (Assumed as SCH 40 for Calculation) TBC tn 8.74 mm
Required Thickness of nozzle trn = 4.00 mm
ASME Sec VIII Div 1
UG-41(a) Strength Reduction Factor fr 1 -
Strength Reduction Factor Nozzle Branching fr1 = 1 -
Strength Factor Sn/Sv fr2 = 0.86 -
Strenght factor for Pad/Nozzle fr3 = 0.86 -
Strenght factor for Pad fr4 = 1.00 -
Joint Efficiency at Opening E = 1 -
Inner projection of Nozzle h = 0 mm
Outer Weld Leg Height leg1 = 6.00 mm
Inner Weld Leg Height leg2 = 0.00 mm

Without Reinforcement Element

ASME Sec VIII Div 1
Fig. UG-37.1 Required Area A = 286.86 mm2

Area Available in Shell A1 = 55.70 mm2

Area Available in Outward Nozzle A2 = 162.12 mm2

Area Available in Inward Nozzle A3 = 0.00 mm2

Outward Nozzle Weld A41 = 30.78 mm2

Inward Nozzle Weld A43 = 0.00 mm2

Total Available area = 248.60 mm2
Conclusion Reinforment Pad is Required
With Reinforcement Element

Pad Allowable Max Stress A516 Gr 70 Sp = 138000 kPa

Reinforcement Pad Diameter Dp = 200 mm

Reinforcement Pad Thickness te = 6 mm

Area Available in Outward Nozzle A3 = 162.12174 mm2

Outward Nozzle Weld A41 = 30.782609 mm2

Outer Element Weld A42 = 36 mm2

Inward Nozzle Weld A43 = 0 mm2

Area Available in Reinforcement Element A5 = 838.2 mm2

Total Available area = 1122.80 mm2
Conclusion Reinforment Pad is Sufficient