codeware, inc. - hs eng · deficiencies summary warnings summary warnings for support skirt it is...
TRANSCRIPT
![Page 1: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/1.jpg)
Codeware, Inc.
Sarasota, FL, USA
www.codeware.com
COMPRESS Pressure Vessel Design Calculations
Item: Vessel No: Customer: Contract: Designer:
Date:
You can edit this page by selecting Cover Page settings... in the report menu.
![Page 2: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/2.jpg)
Deficiencies Summary
Warnings Summary
Warnings for Support SkirtIt is recommended that the skirt thickness be at least D/400 (warning)The Skirt/Legs/Saddles Stress Increase factor is 1.20 (Set Mode Options dialog on the Calculationpage). AISC ASD supplement No. 1 (Dec. 17, 2001) paragraph A5 removed the stress increasefactor of 1/3. For the specified building code the recommended stress increase factor is 1.00.(warning)
Warnings for Top Ellipsoidal HeadExternal design pressure varies across this chamber. (warning)Check the following component(s): (warning)Shell (warning)
1/43
![Page 3: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/3.jpg)
Pressure Summary
Pressure Summary for Chamber bounded by Bottom Ellipsoidal Head and Top EllipsoidalHead
IdentifierP
Design( kPa)
T
Design( °C)
MAWP( kPa)
MAP( kPa)
MAEP( kPa)
Te
external( °C)
MDMT( °C)
MDMTExemption
ImpactTested
Top Ellipsoidal Head 343.23 168 411.49 418.78 N/A 145 -196 Note 1 No
Straight Flange on Top Ellipsoidal Head 343.23 168 483.04 491.59 N/A 145 -196 Note 2 No
Shell 343.23 168 1,188.31 1,224.27 287.28 145 -196 Note 3 No
Straight Flange on Bottom Ellipsoidal Head 343.23 168 468.15 491.59 N/A 145 -196 Note 2 No
Bottom Ellipsoidal Head 343.23 168 391.39 418.78 N/A 145 -196 Note 1 No
Jacket closure (Ring #2 in Group) N/A N/A N/A N/A 245.17 145 N/A N/A No
Jacket closure N/A N/A N/A N/A 245.17 145 N/A N/A No
Chamber design MDMT is -15 °CChamber rated MDMT is -196 °C @ 391.39 kPaChamber MAWP was used in the MDMT determination
Chamber MAWP hot & corroded is 391.39 kPa @ 168 °C
Chamber MAP cold & new is 418.78 kPa @ 17 °C
This pressure chamber is not designed for external pressure.
Notes for MDMT Rating:
Note # Exemption Details
1. Material Rated MDMT per UHA-51(d)(1)(a) = -196 °C
2. Rated MDMT per UHA-51(d)(1)(a) = -196 °C
3. Impact test exempt per UHA-51(g)(coincident ratio = 0.3303)
Design notes are available on the Settings Summary page.
2/43
![Page 4: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/4.jpg)
Revision History
No. Date Operator Notes
0 5/16/2012 YUIL New vessel created ASME Section VIII Division 1 [COMPRESS 2012Build 7200]
3/43
![Page 5: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/5.jpg)
Settings Summary
COMPRESS 2012 Build 7200
Units: SI
Datum Line Location: -30.00 mm from bottom seam
Design
ASME Section VIII Division 1, 2010 Edition, A11 Addenda Metric
Design or Rating: Get Thickness from PressureMinimum thickness: 1.5 mm per UG-16(b)Design for cold shut down only: NoDesign for lethal service (full radiography required): NoDesign nozzles for: Design P onlyCorrosion weight loss: 100% of theoretical lossUG-23 Stress Increase: 1.20Skirt/legs stress increase: 1.2Minimum nozzle projection: 150.01 mmJuncture calculations for α > 30 only: NoPreheat P-No 1 Materials > 1.25" and <= 1.50" thick: YesUG-37(a) shell tr calculation considers longitudinal stress: NoButt welds are tapered per Figure UCS-66.3(a).
Hydro/Pneumatic Test
Shop Hydrotest Pressure: 1.3 times vessel MAWPTest liquid specific gravity: 1.00Maximum stress during test: 90% of yield
Required Marking - UG-116
UG-116(e) Radiography: RT1UG-116(f) Postweld heat treatment: None
Code Cases\Interpretations
Use Code Case 2547: NoApply interpretation VIII-1-83-66: YesApply interpretation VIII-1-86-175: YesApply interpretation VIII-1-83-115: Yes
4/43
![Page 6: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/6.jpg)
Apply interpretation VIII-1-01-37: YesNo UCS-66.1 MDMT reduction: NoNo UCS-68(c) MDMT reduction: NoDisallow UG-20(f) exemptions: No
UG-22 Loadings
UG-22(a) Internal or External Design Pressure : YesUG-22(b) Weight of the vessel and normal contents under operating or test conditions: YesUG-22(c) Superimposed static reactions from weight of attached equipment (external loads): YesUG-22(d)(2) Vessel supports such as lugs, rings, skirts, saddles and legs: YesUG-22(f) Wind reactions: YesUG-22(f) Seismic reactions: YesUG-22(j) Test pressure and coincident static head acting during the test: YesNote: UG-22(b),(c) and (f) loads only considered when supports are present.
5/43
![Page 7: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/7.jpg)
Thickness Summary
ComponentIdentifier
Material Diameter(mm)
Length(mm)
Nominal t(mm)
Design t(mm)
Total Corrosion(mm)
JointE
Load
Top Ellipsoidal Head SA-240 304L 2,800 ID 705.1 5.1* 4.25 0 1.00 Internal
Straight Flange on Top Ellipsoidal Head SA-240 304L 2,800 ID 30 6 4.26 0 1.00 Internal
Shell SA-240 304L 2,800 ID 2,840 15 13.47 0 1.00 External
Straight Flange on Bottom Ellipsoidal Head SA-240 304L 2,800 ID 30 6 4.45 0 1.00 Internal
Bottom Ellipsoidal Head SA-240 304L 2,800 ID 705.1 5.1* 4.5 0 1.00 Internal
Support Skirt SA-240 316L 2,800 ID 1,440 6 0.7 0 0.55 Seismic
Nominal t: Vessel wall nominal thickness
Design t: Required vessel thickness due to governing loading + corrosion
Joint E: Longitudinal seam joint efficiency
* Head minimum thickness after forming
Load
internal: Circumferential stress due to internal pressure governs
external: External pressure governs
Wind: Combined longitudinal stress of pressure + weight + wind governs
Seismic: Combined longitudinal stress of pressure + weight + seismic governs
6/43
![Page 8: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/8.jpg)
Weight Summary
ComponentWeight ( kg) Contributed by Vessel Elements
MetalNew*
Metal
Corroded* Insulation InsulationSupports Lining Piping
+ Liquid
Operating Liquid Test Liquid
New Corroded New CorrodedTop Ellipsoidal Head 384.1 384.1 0 0 0 0 0 0 3,055.7 3,055.7
Shell 3,024.1 3,024.1 0 0 0 0 9,211.3 9,211.3 17,472.7 17,472.7
Bottom Ellipsoidal Head 384.1 384.1 0 0 0 0 2,322.3 2,322.3 3,055.7 3,055.7
Support Skirt 611.4 611.4 0 0 0 0 0 0 0 0
Skirt Base Ring 319.8 319.8 0 0 0 0 0 0 0 0
TOTAL: 4,723.5 4,723.5 0 0 0 0 11,533.7 11,533.7 23,584.1 23,584.1
* Shells with attached nozzles have weight reduced by material cut out for opening.
Component
Weight ( kg) Contributed by Attachments
Body Flanges Nozzles &Flanges Packed
BedsLadders &Platforms
Trays TraySupports
Rings &Clips
VerticalLoads
New Corroded New Corroded
Top Ellipsoidal Head 0 0 0 0 0 0 0 0 0 0
Shell 0 0 0 0 0 0 0 0 227.3 1,083
Bottom Ellipsoidal Head 0 0 0 0 0 0 0 0 0 0
Support Skirt 0 0 0 0 0 0 0 0 0 0
TOTAL: 0 0 0 0 0 0 0 0 227.3 1,083
Vessel operating weight, Corroded: 17,567 kgVessel operating weight, New: 17,567 kgVessel empty weight, Corroded: 6,034 kgVessel empty weight, New: 6,034 kgVessel test weight, New: 29,618 kgVessel test weight, Corroded: 29,618 kg
Vessel center of gravity location - from datum - lift condition
Vessel Lift Weight, New: 6,034 kgCenter of Gravity: 1,033.9 mm
Vessel Capacity
Vessel Capacity** (New): 23,604 litersVessel Capacity** (Corroded): 23,604 liters**The vessel capacity does not include volume of nozzle, piping or other attachments.
7/43
![Page 9: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/9.jpg)
Hydrostatic Test
Shop test pressure determination for Chamber bounded by Bottom Ellipsoidal Head andTop Ellipsoidal Head based on MAWP per UG-99(b)
Shop hydrostatic test gauge pressure is 517.81 kPa at 17 °C (the chamber MAWP = 391.39 kPa)
The shop test is performed with the vessel in the horizontal position.
Identifier
Localtest
pressurekPa
TestliquidstaticheadkPa
UG-99(b)stressratio
UG-99(b)pressure
factor
Stressduring
testMPa
Allowabletest
stressMPa
Stressexcessive?
Top Ellipsoidal Head (1) 545.24 27.44 1.0177 1.30 134.707 154.8 No
Straight Flange on TopEllipsoidal Head 545.24 27.44 1.0177 1.30 127.496 154.8 No
Shell 545.24 27.44 1.0177 1.30 51.162 154.8 No
Straight Flange onBottom Ellipsoidal Head 545.24 27.44 1.0177 1.30 127.496 154.8 No
Bottom Ellipsoidal Head 545.24 27.44 1.0177 1.30 134.707 154.8 No
Notes:(1) Top Ellipsoidal Head limits the UG-99(b) stress ratio.(2) The zero degree angular position is assumed to be up, and the test liquid height is assumed tothe top-most flange.
The field test condition has not been investigated for the Chamber bounded by Bottom EllipsoidalHead and Top Ellipsoidal Head .
8/43
![Page 10: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/10.jpg)
Vacuum Summary
Component Line of SupportElevation
above Datum(mm)
Length Le(mm)
Top Ellipsoidal Head - 3,605.1 N/A
- 1/3 depth of Top Ellipsoidal Head 3,133.33 N/A
Straight Flange on Top Ellipsoidal Head Top - 2,900 553.33
Straight Flange on Top Ellipsoidal Head Bottom - 2,870 553.33
Shell Top - 2,870 2,500
- Jacket closure (Ring #2 in Group) 2,580 1,526.67
- Jacket closure 80 1,406.67
Shell Bottom - 30 2,500
Straight Flange on Bottom Ellipsoidal Head Top - 30 313.33
Straight Flange on Bottom Ellipsoidal Head Bottom - 0 313.33
- 1/3 depth of Bottom Ellipsoidal Head -233.33 N/A
Bottom Ellipsoidal Head - -705.1 N/A
Notes
For main components, the listed value of 'Le' is the largest unsupported length for the component.
For Rings, the listed value of 'Le' is Ls per UG-29.
9/43
![Page 11: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/11.jpg)
Shell
ASME Section VIII Division 1, 2010 Edition, A11 Addenda Metric
Component: CylinderMaterial specification: SA-240 304L (II-D Metric p. 82, ln. 20)Impact test exempt per UHA-51(g)(coincident ratio = 0.3303)
Internal design pressure: P = 343.23 kPa @ 168 °CExternal design pressure: Pe = 245.17 kPa @ 145 °C
Static liquid head:
Ps = 14.67 kPa (SG = 0.76, Hs = 1,970 mm,Operating head)
Pth = 27.44 kPa (SG = 1, Hs = 2,800 mm, Horizontal testhead)
Corrosion allowance Inner C = 0 mm Outer C = 0 mm
Design MDMT = -15 °C No impact test performedRated MDMT = -196 °C Material is not normalized
Material is not produced to Fine Grain PracticePWHT is not performed
Radiography: Longitudinal joint - Full UW-11(a) Type 1Top circumferential joint - Full UW-11(a) Type 1Bottom circumferential joint - Full UW-11(a) Type 1
Estimated weight New = 3,024.1 kg corr = 3,024.1 kgCapacity New = 17,487.36 liters corr = 17,487.36 liters
ID = 2,800 mmLengthLc
= 2,840 mm
t = 15 mm
Design thickness, (at 168 °C) UG-27(c)(1)
t = P*R / (S*E - 0.60*P) + Corrosion= 357.9*1,400 / (113,000*1.00 - 0.60*357.9) + 0= 4.44 mm
Maximum allowable working pressure, (at 168 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t) - Ps= 113,000*1.00*15 / (1,400 + 0.60*15) - 14.67= 1,188.31 kPa
10/43
![Page 12: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/12.jpg)
Maximum allowable pressure, (at 17 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t)= 115,000*1.00*15 / (1,400 + 0.60*15)= 1,224.27 kPa
External Pressure, (Corroded & at 145 °C) UG-28(c)
L / Do = 2,500 / 2,830 = 0.8834Do / t = 2,830 / 13.47 = 210.1281From table G: A = 0.000503From table HA-3Metric: B = 38.6372 MPa
Pa = 4*B / (3*(Do / t))= 4*38,637.18 / (3*(2,830 / 13.47))= 245.17 kPa
Design thickness for external pressure Pa = 245.17 kPa
ta = t + Corrosion = 13.47 + 0 = 13.47mm
Maximum Allowable External Pressure, (Corroded & at 145 °C) UG-28(c)
L / Do = 2,500 / 2,830 = 0.8834Do / t = 2,830 / 15 = 188.6667From table G: A = 0.000601From table HA-3Metric: B = 40.6505 MPa
Pa = 4*B / (3*(Do / t))= 4*40,650.49 / (3*(2,830 / 15))= 287.28 kPa
% Forming strain - UHA-44(a)(2)(a)
EFE = (50*t / Rf)*(1 - Rf / Ro)= (50*15 / 1,407.5)*(1 - 1,407.5 / ϒ⊆)= 0.5329%
External Pressure + Weight + Wind Loading Check (Bergman, ASME paper 54-A-104)
Pv = W / (2*π*Rm) + M / (π*Rm2)
= 98.03*4,718.5 / (2*π*1,407.5) + 10000*24,370.8 / (π*1,407.52)= 91.4812 N/cm
11/43
![Page 13: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/13.jpg)
α = Pv / (Pe*Do)= 100*91.4812 / (245.17*2,830)= 0.0132
n = 6
m = 1.23 / (L / Do)2
= 1.23 / (2,500 / 2,830)2
= 1.5762
Ratio Pe = (n2 - 1 + m + m*α) / (n2 - 1 + m)= (62 - 1 + 1.5762 + 1.5762*0.0132) / (62 - 1 + 1.5762)= 1.0006
Ratio Pe * Pe ≤ MAEP design cylinder thickness is satisfactory.
External Pressure + Weight + Seismic Loading Check (Bergman, ASME paper 54-A-104)
Pv = (1 + VAccel)*W / (2*π*Rm) + M / (π*Rm2)
= 1.20*98.03*4,718.5 / (2*π*1,407.5) + 10000*36,317.8 / (π*1,407.52)= 121.1419 N/cm
α = Pv / (Pe*Do)= 100*121.1419 / (245.17*2,830)= 0.0175
n = 6
m = 1.23 / (L / Do)2
= 1.23 / (2,500 / 2,830)2
= 1.5762
Ratio Pe = (n2 - 1 + m + m*α) / (n2 - 1 + m)= (62 - 1 + 1.5762 + 1.5762*0.0175) / (62 - 1 + 1.5762)= 1.0008
Ratio Pe * Pe ≤ MAEP design cylinder thickness is satisfactory.
Design thickness = 13.47 mm
The governing condition is due to external pressure.
The cylinder thickness of 15 mm is adequate.
12/43
![Page 14: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/14.jpg)
Thickness Required Due to Pressure + External Loads
Condition Pressure P (kPa)
AllowableStressBeforeUG-23Stress
Increase (MPa)
Temperature (°C)
Corrosion C(mm) Load Req'd Thk Due
to Tension (mm)
Req'd Thk Dueto
Compression(mm)
St Sc
Operating, Hot & Corroded 343.23 113 44.18 168 0 Wind 1.78 1.7
Seismic 1.78 1.68
Operating, Hot & New 343.23 113 44.18 168 0 Wind 1.78 1.7
Seismic 1.78 1.68
Hot Shut Down, Corroded 0 113 44.18 168 0 Wind 0.01 0.17
Seismic 0 0.23
Hot Shut Down, New 0 113 44.18 168 0 Wind 0.01 0.17
Seismic 0 0.23
Empty, Corroded 0 115 63.58 21.11 0 Wind 0.01 0.12
Seismic 0.03 0.12
Empty, New 0 115 63.58 21.11 0 Wind 0.01 0.12
Seismic 0.03 0.12
Vacuum -245.17 115 47.17 145 0 Wind 3.02 3.19
Seismic 3.02 3.24
Hot Shut Down, Corroded,Weight & EccentricMoments Only
0 113 44.18 168 0 Weight 0.12 0.12
13/43
![Page 15: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/15.jpg)
Top Ellipsoidal Head
ASME Section VIII, Division 1, 2010 Edition, A11 Addenda Metric
Component: Ellipsoidal HeadMaterial Specification: SA-240 304L (II-D Metric p.82, ln. 20)Material Rated MDMT per UHA-51(d)(1)(a) = -196 °C
Internal design pressure: P = 343.23 kPa @ 168 °C
Static liquid head:
Ps= 0 kPa (SG=0.76, Hs=0 mm Operating head)Pth= 27.44 kPa (SG=1, Hs=2800 mm Horizontal test head)
Corrosion allowance: Inner C = 0 mm Outer C = 0 mm
Design MDMT = -15°C No impact test performedRated MDMT = -196°C Material is not normalized
Material is not produced to fine grain practicePWHT is not performedDo not Optimize MDMT / Find MAWP
Radiography: Category A joints - Full UW-11(a) Type 1 Head to shell seam - Full UW-11(a) Type 1
Estimatedweight*: new = 384.1 kg corr = 384.1 kg
Capacity*: new = 3,058.2 liters corr = 3,058.2 liters* includes straight flange
Inner diameter = 2800 mmMinimum head thickness = 5.1 mmHead ratio D/2h = 2 (new)Head ratio D/2h = 2 (corroded)Straight flange length Lsf = 30 mmNominal straight flange thickness tsf = 6 mmResults Summary
The governing condition is internal pressure.Minimum thickness per UG-16 = 1.5 mm + 0 mm = 1.5 mmDesign thickness due to internal pressure (t) = 4.25 mmMaximum allowable working pressure (MAWP) = 411.49 kPaMaximum allowable pressure (MAP) = 418.78 kPa
14/43
![Page 16: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/16.jpg)
Design thickness for internal pressure, (Corroded at 168 °C) UG-32(d)(1)
t = P*D / (2*S*E - 0.2*P) + Corrosion= 343.23*2,800 / (2*113,000.004*1 - 0.2*343.23) + 0= 4.25 mm
The head internal pressure design thickness is 4.25 mm.
Maximum allowable working pressure, (Corroded at 168 °C) UG-32(d)(1)
P = 2*S*E*t / (D + 0.2*t) - Ps= 2*113,000.004*1*5.1 / (2,800 +0.2*5.1) - 0= 411.49 kPa
The maximum allowable working pressure (MAWP) is 411.49 kPa.
Maximum allowable pressure, (New at 17 °C) UG-32(d)(1)
P = 2*S*E*t / (D + 0.2*t) - Ps= 2*114,999.995*1*5.1 / (2,800 +0.2*5.1) - 0= 418.78 kPa
The maximum allowable pressure (MAP) is 418.78 kPa.
% Forming strain - UHA-44(a)(2)(b)
EFE = (75*t / Rf)*(1 - Rf / Ro)= (75*6 / 479)*(1 - 479 / ϒ⊆)= 0.9395%
15/43
![Page 17: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/17.jpg)
Straight Flange on Top Ellipsoidal Head
ASME Section VIII Division 1, 2010 Edition, A11 Addenda Metric
Component: Straight FlangeMaterial specification: SA-240 304L (II-D Metric p. 82, ln. 20)Rated MDMT per UHA-51(d)(1)(a) = -196 °C
Internal design pressure: P = 343.23 kPa @ 168 °C
Static liquid head:
Ps = 0 kPa (SG = 0.76, Hs = 0 mm,Operating head)
Pth = 27.44 kPa (SG = 1, Hs = 2,800 mm, Horizontal testhead)
Corrosion allowance Inner C = 0 mm Outer C = 0 mm
Design MDMT = -15 °C No impact test performedRated MDMT = -196 °C Material is not normalized
Material is not produced to Fine Grain PracticePWHT is not performed
Radiography: Longitudinal joint - Full UW-11(a) Type 1Circumferential joint - Full UW-11(a) Type 1
Estimated weight New = 12.7 kg corr = 12.7 kgCapacity New = 184.73 liters corr = 184.73 liters
ID = 2,800 mmLengthLc
= 30 mm
t = 6 mm
Design thickness, (at 168 °C) UG-27(c)(1)
t = P*R / (S*E - 0.60*P) + Corrosion= 343.23*1,400 / (113,000*1.00 - 0.60*343.23) + 0= 4.26 mm
Maximum allowable working pressure, (at 168 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t) - Ps= 113,000*1.00*6 / (1,400 + 0.60*6) - 0= 483.04 kPa
16/43
![Page 18: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/18.jpg)
Maximum allowable pressure, (at 17 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t)= 115,000*1.00*6 / (1,400 + 0.60*6)= 491.59 kPa
% Forming strain - UHA-44(a)(2)(a)
EFE = (50*t / Rf)*(1 - Rf / Ro)= (50*6 / 1,403)*(1 - 1,403 / ϒ⊆)= 0.2138%
Design thickness = 4.26 mm
The governing condition is due to internal pressure.
The cylinder thickness of 6 mm is adequate.
17/43
![Page 19: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/19.jpg)
Thickness Required Due to Pressure + External Loads
Condition Pressure P (kPa)
AllowableStressBeforeUG-23Stress
Increase (MPa)
Temperature (°C)
Corrosion C(mm) Load Req'd Thk Due
to Tension (mm)
Req'd Thk Dueto
Compression(mm)
St Sc
Operating, Hot & Corroded 343.23 113 37.46 168 0 Wind 1.77 1.77
Seismic 1.77 1.77
Operating, Hot & New 343.23 113 37.46 168 0 Wind 1.77 1.77
Seismic 1.77 1.77
Hot Shut Down, Corroded 0 113 37.46 168 0 Wind 0 0.01
Seismic 0.01 0.01
Hot Shut Down, New 0 113 37.46 168 0 Wind 0 0.01
Seismic 0.01 0.01
Empty, Corroded 0 115 51.95 21.11 0 Wind 0 0.01
Seismic 0.01 0.01
Empty, New 0 115 51.95 21.11 0 Wind 0 0.01
Seismic 0.01 0.01
Hot Shut Down, Corroded,Weight & EccentricMoments Only
0 113 37.46 168 0 Weight 0.01 0.01
18/43
![Page 20: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/20.jpg)
Straight Flange on Bottom Ellipsoidal Head
ASME Section VIII Division 1, 2010 Edition, A11 Addenda Metric
Component: Straight FlangeMaterial specification: SA-240 304L (II-D Metric p. 82, ln. 20)Rated MDMT per UHA-51(d)(1)(a) = -196 °C
Internal design pressure: P = 343.23 kPa @ 168 °C
Static liquid head:
Ps = 14.89 kPa (SG = 0.76, Hs = 2,000 mm,Operating head)
Pth = 27.44 kPa (SG = 1, Hs = 2,800 mm, Horizontal testhead)
Corrosion allowance Inner C = 0 mm Outer C = 0 mm
Design MDMT = -15 °C No impact test performedRated MDMT = -196 °C Material is not normalized
Material is not produced to Fine Grain PracticePWHT is not performed
Radiography: Longitudinal joint - Full UW-11(a) Type 1Circumferential joint - Full UW-11(a) Type 1
Estimated weight New = 12.7 kg corr = 12.7 kgCapacity New = 184.73 liters corr = 184.73 liters
ID = 2,800 mmLengthLc
= 30 mm
t = 6 mm
Design thickness, (at 168 °C) UG-27(c)(1)
t = P*R / (S*E - 0.60*P) + Corrosion= 358.13*1,400 / (113,000*1.00 - 0.60*358.13) + 0= 4.45 mm
Maximum allowable working pressure, (at 168 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t) - Ps= 113,000*1.00*6 / (1,400 + 0.60*6) - 14.89= 468.15 kPa
19/43
![Page 21: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/21.jpg)
Maximum allowable pressure, (at 17 °C) UG-27(c)(1)
P = S*E*t / (R + 0.60*t)= 115,000*1.00*6 / (1,400 + 0.60*6)= 491.59 kPa
% Forming strain - UHA-44(a)(2)(a)
EFE = (50*t / Rf)*(1 - Rf / Ro)= (50*6 / 1,403)*(1 - 1,403 / ϒ⊆)= 0.2138%
Design thickness = 4.45 mm
The governing condition is due to internal pressure.
The cylinder thickness of 6 mm is adequate.
20/43
![Page 22: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/22.jpg)
Thickness Required Due to Pressure + External Loads
Condition Pressure P (kPa)
AllowableStressBeforeUG-23Stress
Increase (MPa)
Temperature (°C)
Corrosion C(mm) Load Req'd Thk Due
to Tension (mm)
Req'd Thk Dueto
Compression(mm)
St Sc
Operating, Hot & Corroded 343.23 113 37.46 168 0 Wind 1.78 1.7
Seismic 1.78 1.68
Operating, Hot & New 343.23 113 37.46 168 0 Wind 1.78 1.7
Seismic 1.78 1.68
Hot Shut Down, Corroded 0 113 37.46 168 0 Wind 0.01 0.21
Seismic 0.01 0.27
Hot Shut Down, New 0 113 37.46 168 0 Wind 0.01 0.21
Seismic 0.01 0.27
Empty, Corroded 0 115 51.95 21.11 0 Wind 0.01 0.15
Seismic 0.04 0.15
Empty, New 0 115 51.95 21.11 0 Wind 0.01 0.15
Seismic 0.04 0.15
Hot Shut Down, Corroded,Weight & EccentricMoments Only
0 113 37.46 168 0 Weight 0.14 0.14
21/43
![Page 23: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/23.jpg)
Bottom Ellipsoidal Head
ASME Section VIII, Division 1, 2010 Edition, A11 Addenda Metric
Component: Ellipsoidal HeadMaterial Specification: SA-240 304L (II-D Metric p.82, ln. 20)Material Rated MDMT per UHA-51(d)(1)(a) = -196 °C
Internal design pressure: P = 343.23 kPa @ 168 °C
Static liquid head:
Ps= 20.11 kPa (SG=0.76, Hs=2700 mm Operating head)Pth= 27.44 kPa (SG=1, Hs=2800 mm Horizontal test head)
Corrosion allowance: Inner C = 0 mm Outer C = 0 mm
Design MDMT = -15°C No impact test performedRated MDMT = -196°C Material is not normalized
Material is not produced to fine grain practicePWHT is not performedDo not Optimize MDMT / Find MAWP
Radiography: Category A joints - Full UW-11(a) Type 1 Head to shell seam - Full UW-11(a) Type 1
Estimatedweight*: new = 384.1 kg corr = 384.1 kg
Capacity*: new = 3,058.2 liters corr = 3,058.2 liters* includes straight flange
Inner diameter = 2800 mmMinimum head thickness = 5.1 mmHead ratio D/2h = 2 (new)Head ratio D/2h = 2 (corroded)Straight flange length Lsf = 30 mmNominal straight flange thickness tsf = 6 mmResults Summary
The governing condition is internal pressure.Minimum thickness per UG-16 = 1.5 mm + 0 mm = 1.5 mmDesign thickness due to internal pressure (t) = 4.5 mmMaximum allowable working pressure (MAWP) = 391.39 kPaMaximum allowable pressure (MAP) = 418.78 kPa
22/43
![Page 24: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/24.jpg)
Design thickness for internal pressure, (Corroded at 168 °C) UG-32(d)(1)
t = P*D / (2*S*E - 0.2*P) + Corrosion= 363.34*2,800 / (2*113,000.004*1 - 0.2*363.34) + 0= 4.5 mm
The head internal pressure design thickness is 4.5 mm.
Maximum allowable working pressure, (Corroded at 168 °C) UG-32(d)(1)
P = 2*S*E*t / (D + 0.2*t) - Ps= 2*113,000.004*1*5.1 / (2,800 +0.2*5.1) - 20.11= 391.39 kPa
The maximum allowable working pressure (MAWP) is 391.39 kPa.
Maximum allowable pressure, (New at 17 °C) UG-32(d)(1)
P = 2*S*E*t / (D + 0.2*t) - Ps= 2*114,999.995*1*5.1 / (2,800 +0.2*5.1) - 0= 418.78 kPa
The maximum allowable pressure (MAP) is 418.78 kPa.
% Forming strain - UHA-44(a)(2)(b)
EFE = (75*t / Rf)*(1 - Rf / Ro)= (75*6 / 479)*(1 - 479 / ϒ⊆)= 0.9395%
23/43
![Page 25: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/25.jpg)
Jacket closure
Stiffener ring calculations per UG-29(a)
Ring type: Flat barRing description: 12t*130wRing material: SA-285 C (II-D Metric p. 6, ln. 42)External pressure: 245.17 kPaRing is located: outside the vesselDistance from ring neutral axis to datum: 80 mmRing corrosion allowance: 0 mmDistance to previous support: 2,500 mmDistance to next support: 313.33 mm
L / Do = 2,500 / 2,830 = 0.8834Do / t = 2,830 / 13.47 = 210.1226From Table G: A = 0.000503
From Table HA-3 Metric: B = 38.638MPa
Pa = 4*B / (3*(Do / t))= 4*38.638 / (3*(2,830 / 13.47))= 0.2452 MPa
B = 0.75*P*Do / (t + As / Ls)= 0.75*245.17*2,830 / (13.47 + 1,560 / 1,406.67) / 1000= 35.7 MPa
From Table CS-2 Metric: A = 0.00036015 (ring, 145°C)From Table HA-3 Metric: A = 0.00045692 (shell, 145°C)
Is' = [Do2*Ls*(t + As / Ls)*A] / 10.9
= [2,8302*1,406.67*(13.47 + 1,560 / 1,406.67)*0.00045692] / 10.9 / 10000= 688.37 cm4
I' for the composite corroded shell-ring cross section is 788.13 cm4
As I' >= Is' a 12t*130w stiffener is adequate for an external pressure of 245.17 kPa.
Check the stiffener ring attachment welds per UG-30
Fillet weld is: Continuous both sides
24/43
![Page 26: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/26.jpg)
Fillet weld leg size: 6 mmVessel thickness at weld location, new: 15 mmVessel corrosion allowance at weld location: 0 mmStiffener thickness at weld location: 12 mm
Per UG-30(f)(1) the minimum attachment weld size is 6 mm
** The fillet weld size of 6 mm is not adequate per UG-30(f)(1). **
Radial pressure load, P*Ls = 245.17*1,406.67 / 100 = 3,448.67 N/cmRadial shear load, V = 0.01*P*Ls*Do = 0.01*245.17 / 1000*1,406.67*2,830 = 9,759.74 NFirst moment of area, Q = 34*2.28 = 77.5251 cm3
Weld shear flow, q = V*Q / I' = 960.0238 N/cmCombined weld load, fw = Sqr(3,448.67112 + 960.02382) = 3,579.8 N/cm
Allowable weld stress per UW-18(d) Sw = 0.55*S = 0.55*108 = 59.4 MPa
Fillet weld size required to resist radial pressure and shear
= fw*(dweld segment
+ dtoe
) / (Sw*dweld total
) + corrosion= 3,579.8*(25.4 + 0) / (10*59.4*50.8) + 0= 3.01 mm
The fillet weld size of 6 mm is adequate to resist radial pressure and shear.
25/43
![Page 27: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/27.jpg)
Jacket closure (Ring #2 in Group)
Stiffener ring calculations per UG-29(a)
Ring type: Flat barRing description: 12t*130wRing material: SA-285 C (II-D Metric p. 6, ln. 42)External pressure: 245.17 kPaRing is located: outside the vesselDistance from ring neutral axis to datum: 2,580 mmRing corrosion allowance: 0 mmDistance to previous support: 553.33 mmDistance to next support: 2,500 mm
L / Do = 2,500 / 2,830 = 0.8834Do / t = 2,830 / 13.47 = 210.1226From Table G: A = 0.000503
From Table HA-3 Metric: B = 38.638MPa
Pa = 4*B / (3*(Do / t))= 4*38.638 / (3*(2,830 / 13.47))= 0.2452 MPa
B = 0.75*P*Do / (t + As / Ls)= 0.75*245.17*2,830 / (13.47 + 1,560 / 1,526.67) / 1000= 35.915 MPa
From Table CS-2 Metric: A = 0.00036230 (ring, 145°C)From Table HA-3 Metric: A = 0.00046558 (shell, 145°C)
Is' = [Do2*Ls*(t + As / Ls)*A] / 10.9
= [2,8302*1,526.67*(13.47 + 1,560 / 1,526.67)*0.00046558] / 10.9 / 10000= 756.7 cm4
I' for the composite corroded shell-ring cross section is 788.13 cm4
As I' >= Is' a 12t*130w stiffener is adequate for an external pressure of 245.17 kPa.
Check the stiffener ring attachment welds per UG-30
Fillet weld is: Continuous both sides
26/43
![Page 28: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/28.jpg)
Fillet weld leg size: 6 mmVessel thickness at weld location, new: 15 mmVessel corrosion allowance at weld location: 0 mmStiffener thickness at weld location: 12 mm
Per UG-30(f)(1) the minimum attachment weld size is 6 mm
** The fillet weld size of 6 mm is not adequate per UG-30(f)(1). **
Radial pressure load, P*Ls = 245.17*1,526.67 / 100 = 3,742.87 N/cmRadial shear load, V = 0.01*P*Ls*Do = 0.01*245.17 / 1000*1,526.67*2,830 = 10,592.33 NFirst moment of area, Q = 34*2.28 = 77.5251 cm3
Weld shear flow, q = V*Q / I' = 1,041.922 N/cmCombined weld load, fw = Sqr(3,742.87062 + 1,041.92162) = 3,885.19 N/cm
Allowable weld stress per UW-18(d) Sw = 0.55*S = 0.55*108 = 59.4 MPa
Fillet weld size required to resist radial pressure and shear
= fw*(dweld segment
+ dtoe
) / (Sw*dweld total
) + corrosion= 3,885.19*(25.4 + 0) / (10*59.4*50.8) + 0= 3.27 mm
The fillet weld size of 6 mm is adequate to resist radial pressure and shear.
27/43
![Page 29: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/29.jpg)
Skirt Base Ring
Base configuration: double base plateFoundation compressive strength: 11.432 MPaConcrete ultimate 28-day strength: 20.684 MPaAnchor bolt material: A 307-BAnchor bolt allowable stress, Sb: 102.97 MPaBolt circle, BC: 2,922 mmAnchor bolt corrosion allowance (applied to root radius): 0 mmAnchor bolt clearance: 16 mmBase plate material: A 285-CBase plate allowable stress, Sp: 137.895 MPaBase plate inner diameter, Di: 2,702 mmBase plate outer diameter, Do: 2,950 mmBase plate thickness, tb: 22 mmGusset separation, w: 80 mmGusset height, h: 212 mmGusset thickness, tg: 10 mmCompression ring width: 100 mmCompression ring thickness, tc: 16 mmInitial bolt preload: 0 % (0 MPa)Number of bolts, N: 8Bolt size and type: 24 mmBolt root area (corroded), Ab: 3.3826 cm2
Diameter of anchor bolt holes, db: 40 mm
28/43
![Page 30: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/30.jpg)
Load Vesselcondition
Base M(N-m)
W(kg)
Requiredbolt area
(cm2)
trBase(mm)
Foundationbearingstress(MPa)
tr compring
(mm)
trgusset(mm)
Wind operating, corroded 50,404.1 17,567.4 0 4.76 0.2255 0 0
Wind operating, new 50,404.1 17,567.4 0 4.76 0.2255 0 0
Wind empty, corroded 50,404.1 6,033.7 0.4066 4.61 0.2111 3.47 3.96
Wind empty, new 50,404.1 6,033.7 0.4066 4.61 0.2111 3.47 3.96
Seismic operating, corroded 81,214.3 17,567.4 0 5.48 0.2983 0 0
Seismic operating, new 81,214.3 17,567.4 0 5.48 0.2983 0 0
Seismic empty, corroded 32,392.8 6,033.7 0 3.3 0.1085 0 0
Seismic empty, new 32,392.8 6,033.7 0 3.3 0.1085 0 0
Anchor bolt load (governing)
P = -0.6*W / N + 4 * M / (N*BC)= -0.6*59,170.82 / 8 + 4 * 50,404.1 / (8*2.922)= 4,187.12 N
Required area per bolt = P / Sb = 0.4066 cm2
The area provided (3.3826 cm2) by the specified anchor bolt is adequate.
Foundation bearing stress (governing)
Ac = pi*(Do2 - Di
2) / 4 - N*pi*db2 / 4
= π*(2952 - 270.22) / 4 - 8*π*42 / 4= 10,908.36 cm2
Ic = π*(Do4 - Di
4) / 64= π*(2954 - 270.24) / 64= 1.1011E+08 cm4
fc = N*Ab*Preload / Ac + (1 + VAccel)*W / Ac + M / 2*Do / Ic= 8*3.3826*0 / (10,908.36) + (1 + 0.2)*172,277.34 / (100*10,908.36) + 81,214.3 / 2*2,950 /(10*1.1011E+08)= 0.298 MPa
As fc <= 11.432 MPa the base plate width is satisfactory.
Base plate required thickness (governing)
From Brownell & Young, Table 10.3:, l / b = 0.0659
29/43
![Page 31: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/31.jpg)
Mx = 0.0015*0.298*1,047.472 = 504 N
My = -0.4858*0.298*692 = -689.9 N
tr = (6*Mmax / Sp)0.5
= (6*689.91 / 137.895)0.5
= 5.48 mm
The base plate thickness is satisfactory.
Check the compression ring for bolt load (Jawad & Farr equation 12.13)
tcr = (3.91*F / (Sy*(2*b / w+w / (2*l)-db*(2 / w+1 / (2*l)))))0.5
= (3.91*1,190.06 / (206.822*(2*100 / 80+80 / (2*54.99)-40*(2 / 80+1 / (2*54.99)))))0.5
= 3.47 mm
The compression ring thickness is satisfactory.
Check gusset plate thickness (Bednar chapter 4.3)
Radius of gyration of gusset
r = 0.289*tg= 0.289*10= 2.89 mm
Cross sectional area of one gusset
Ag = tg*(b - 0.25*25.41)= 0.01*10*(69 - 0.25*25.41)= 6.265 cm2
Gusset allowable stress
Sa = 0.006895*(17000 - 0.485*(h / r)2)= 117.215 - 0.0033*(212 / 2.89)2
= 99.217 MPa
Gusset axial stress due to bolt load
Sg = F / (2 * Ag)= 1,190.06 / (100*2 * 6.265)= 0.95 MPa
The gusset plate thickness is satisfactory.
Check skirt thickness for bolt load reaction (Brownell & Young eq. 10.59)
30/43
![Page 32: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/32.jpg)
t = 1.76*(F*l / (Mb*hc*Ss))2 / 3*(ODs / 2)1 / 3
= 1.76*(1,190.06*55 / (1,104.27*250*172.5))2 / 3*(2,812 / 2)1 / 3
= 0.24 mm
The skirt thickness is satisfactory.
31/43
![Page 33: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/33.jpg)
Support Skirt
Material: SA-240 316L (II-D Metric p. 66, ln. 35)Design temperature, operating: 158 °CInner diameter at top, new: 2,800mmInner diameter at bottom, new: 2,800mmOverall length (includes base ring thickness): 1,440mmCorrosion allowance inside: 0 mmCorrosion allowance outside: 0 mmWeld joint efficiency top: 0.55Weld joint efficiency bottom: 0.8Nominal thickness, new: 6 mmSkirt is attached to: Bottom Ellipsoidal HeadSkirt attachment offset: 90 mm down from the top seam
Skirt design thickness, largest of the following + corrosion = 0.7 mm
The governing condition is due to earthquake, compressive stress at the base, operating &corroded.
The skirt thickness of 6 mm is adequate.
32/43
![Page 34: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/34.jpg)
LoadingVessel
Condition(Stress)
GoverningSkirt
Location
Temperature(°C)
AllowableStress(MPa)
CalculatedStress/E
(MPa)
Requiredthickness
(mm)
Wind operating, corroded (+) top 158 51.96 -1.16 0.13
Wind operating, corroded (-) bottom 158 51.96 4.56 0.53
Wind empty, corroded (+) bottom 17 138 0.9 0.04
Wind empty, corroded (-) bottom 17 61.77 2.42 0.23
Seismic operating, corroded (+) top 158 51.96 -2.06 0.24
Seismic operating, corroded (-) bottom 158 51.96 6.03 0.7
Seismic empty, corroded (+) top 17 61.77 -0.47 0.05
Seismic empty, corroded (-) bottom 17 61.77 2.14 0.21
Loading due to earthquake, operating & corroded
Tensile side
Required thickness, tensile stress at base:
t = -W / (π*D*St*E) + 4*M / (π*D2*St*E)= -169,141.34 / (π*2,806*51.96*1) + 4*1e3*81,214.3 / (π*2,8062*51.96*1)= 0.12 mm
Required thickness, tensile stress at the top:
t = -Wt / (π*Dt*St*E) + 4*Mt / (π*Dt2*St*E)
= -163,145.84 / (π*2,806*51.96*1) + 4*1e3*38,025.6 / (π*2,8062*51.96*1)= 0.24 mm
Compressive side
Required thickness, compressive stress at base:
t = (1 + VAccel)*W / (π*D*Sc*Ec) + 4*M / (π*D2*Sc*Ec)= (1 + 0.2)*169,141.34 / (π*2,806*51.96*1) + 4*1e3*81,214.3 / (π*2,8062*51.96*1)= 0.7 mm
Required thickness, compressive stress at the top:
t = (1 + VAccel)*Wt / (π*Dt*Sc*Ec) + 4*Mt / (π*Dt2*Sc*Ec)
= (1 + 0.2)*163,145.84 / (π*2,806*51.96*1) + 4*1e3*38,025.6 / (π*2,8062*51.96*1)= 0.55 mm
33/43
![Page 35: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/35.jpg)
Seismic Code
Method of seismic analysis: UBC 1997 ground supportedSeismic Zone: 2BSeismic Zone Factor (Table 16-I): Z = 0.2000R Factor (Table 16-P): R = 2.9000Soil profile: (Table 16-Q): SDImportance Factor: I = 1.2500Vertical Accelerations Considered: YesForce Multiplier: = 0.3333Minimum Weight Multiplier: = 0.2000
Vessel Characteristics
Vessel height: 16.7490 ft (5.11 m)Vessel Weight:Operating, Corroded: 38,729 lb (17,567 kg)
Empty, Corroded: 13,302 lb (6,034 kg)Vacuum, Corroded: 38,729 lb (17,567 kg)
Period of Vibration Calculation
Fundamental Period, T:Operating, Corroded: 0.020 sec (f = 49.4 Hz)
Empty, Corroded: 0.014 sec (f = 73.2 Hz)Vacuum, Corroded: 0.020 sec (f = 50.6 Hz)
The fundamental period of vibration T (above) is calculated using the Rayleigh method ofapproximation:
T = 2 * PI * Sqr( {Sum(Wi * yi2 )} / {g * Sum(Wi * yi )} ), where
Wi is the weight of the ith lumped mass, andyi is its deflection when the system is treated as a cantilever beam.
Seismic Shear Reports:
Operating, CorrodedEmpty, CorrodedVacuum, CorrodedBase Shear Calculations
34/43
![Page 36: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/36.jpg)
Seismic Shear Report: Operating, Corroded
Component Elevation of bottomabove base (mm)
Elastic modulus E(MPa)
Inertia I(m4)
Seismic shear atBottom (N)
Bending Moment atBottom (N-m)
Top Ellipsoidal Head 4,370 184,920.0 * 1,293 487.5
Shell 1,530 184,920.0 0.1314 26,654.7 36,317.8
Bottom Ellipsoidal Head (top) 1,440 184,920.0 * 27,147.6 38,739.2
Support Skirt 0 185,520.0 0.05206 30,148.5 81,214.3
*Moment of Inertia I varies over the length of the componentSeismic Shear Report: Empty, Corroded
Component Elevation of bottomabove base (mm)
Elastic modulus E(MPa)
Inertia I(m4)
Seismic shear atBottom (N)
Bending Moment atBottom (N-m)
Top Ellipsoidal Head 4,370 195,233.3 * 1,219.5 459.8
Shell 1,530 195,233.3 0.1314 9,615 16,962.9
Bottom Ellipsoidal Head (top) 1,440 195,233.3 * 9,661.8 17,830.4
Support Skirt 0 195,233.3 0.05206 10,354.9 32,392.8
*Moment of Inertia I varies over the length of the componentSeismic Shear Report: Vacuum, Corroded
Component Elevation of bottomabove base (mm)
Elastic modulus E(MPa)
Inertia I(m4)
Seismic shear atBottom (N)
Bending Moment atBottom (N-m)
Top Ellipsoidal Head 4,370 186,300.0 * 1,293 487.5
Shell 1,530 186,300.0 0.1314 26,654.7 36,317.8
Bottom Ellipsoidal Head (top) 1,440 186,300.0 * 27,147.6 38,739.2
Support Skirt 0 195,300.0 0.05206 30,148.5 81,214.3
*Moment of Inertia I varies over the length of the component
Vertical Acceleration Term, VAccel
Factor is applied to dead load.Compressive Side: = 1.0 + VAccel
35/43
![Page 37: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/37.jpg)
VAccel Term is:greater of (Force Mult * Base Shear / Weight) or (Min. Weight Mult.)
Force multiplier = 0.3333 Minimum Weight Multiplier = 0.2000
Condition Base Shear ( N) Weight ( kg) Force Mult * ShearWeight VAccel
Operating, Corroded 30,148.5 17,567.4 0.0583 0.2
Operating, New 30,148.5 17,567.4 0.0583 0.2
Empty, Corroded 10,354.9 6,033.7 0.0583 0.2
Empty, New 10,354.9 6,033.7 0.0583 0.2
Vacuum, Corroded 30,148.5 17,567.4 0.0583 0.2
Base Shear Calculations
Operating, CorrodedEmpty, CorrodedVacuum, Corroded
Base Shear Calculations: Operating, Corroded
Rigid structure per 1634.3, p2-21, since period of vibration = 0.020 < 0.06 .V = 0.70 * Ca * I * W / 1.40 = 0.70 * 0.2800 * 1.2500 * 38,729.4844 / 1.4 = 6,777.66 lb (3,074.29kg)
Base Shear Calculations: Empty, Corroded
Rigid structure per 1634.3, p2-21, since period of vibration = 0.014 < 0.06 .V = 0.70 * Ca * I * W / 1.40 = 0.70 * 0.2800 * 1.2500 * 13,302.1289 / 1.4 = 2,327.87 lb (1,055.91kg)
Base Shear Calculations: Vacuum, Corroded
Rigid structure per 1634.3, p2-21, since period of vibration = 0.020 < 0.06 .V = 0.70 * Ca * I * W / 1.40 = 0.70 * 0.2800 * 1.2500 * 38,729.4844 / 1.4 = 6,777.66 lb (3,074.29kg)
36/43
![Page 38: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/38.jpg)
Wind Code
Building Code: ASCE 7-05Elevation of base above grade: 0.9843 ft (0.3000 m)Increase effective outer diameter by: 1.9685 ft (0.6000 m) Wind Force Coefficient Cf: 0.7000
Basic Wind Speed:, V: 111.8468 mph (180.0000km/h)
Importance Factor:, I: 1.5000Exposure category: CWind Directionality Factor, Kd: 0.9500Topographic Factor, Kzt: 1.0000Enforce min. loading of 0.48 kPa: Yes
Vessel Characteristics
Vessel height, h: 16.7490 ft (5.1051 m)Vessel Minimum Diameter, b
Operating, Corroded: 9.2848 ft (2.8300 m)Empty, Corroded: 9.2848 ft (2.8300 m)
Fundamental Frequency, n1
Operating, Corroded: 49.4091 HzEmpty, Corroded: 73.2382 Hz
Vacuum, Corroded: 50.6065 Hz Damping coefficient, β
Operating, Corroded: 0.0245Empty, Corroded: 0.0200
Vacuum, Corroded: 0.0245
Table Lookup Values
2.4.1 Basic Load Combinations for Allowable Stress DesignThe following load combinations are considered in accordance with ASCE section 2.4.1:
5. D + P + Ps + W7. 0.6D + P + Ps + WWhereD = Dead loadP = Internal or external pressure loadPs = Static head loadW = Wind load
37/43
![Page 39: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/39.jpg)
Wind Deflection Reports:
Operating, CorrodedEmpty, CorrodedVacuum, CorrodedWind Pressure Calculations
Wind Deflection Report: Operating, Corroded
Component
Elevation ofbottomabove
base (mm)
EffectiveOD(m)
ElasticmodulusE (MPa)
InertiaI (m4)
Platformwind shear
atBottom (N)
Total windshear atBottom
(N)
bendingmoment at
Bottom(N-m)
Deflectionat top (mm)
Top Ellipsoidal Head 4,370 3.41 184,920.0 * 0 2,580 837.3 0.03
Shell 1,530 3.43 184,920.0 0.1314 0 13,970 24,370.8 0.02
Bottom Ellipsoidal Head(top) 1,440 3.41 184,920.0 * 0 14,327.9 25,644.2 0
Support Skirt 0 3.41 185,520.0 0.05206 0 20,060.9 50,404.1 0
*Moment of Inertia I varies over the length of the componentWind Deflection Report: Empty, Corroded
Component
Elevation ofbottomabove
base (mm)
EffectiveOD(m)
ElasticmodulusE (MPa)
InertiaI (m4)
Platformwind shear
atBottom (N)
Total windshear atBottom
(N)
bendingmoment at
Bottom(N-m)
Deflectionat top (mm)
Top Ellipsoidal Head 4,370 3.41 195,233.3 * 0 2,580 837.3 0.03
Shell 1,530 3.43 195,233.3 0.1314 0 13,970 24,370.8 0.02
Bottom Ellipsoidal Head(top) 1,440 3.41 195,233.3 * 0 14,327.9 25,644.2 0
Support Skirt 0 3.41 195,233.3 0.05206 0 20,060.9 50,404.1 0
*Moment of Inertia I varies over the length of the component
38/43
![Page 40: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/40.jpg)
Wind Deflection Report: Vacuum, Corroded
Component
Elevation ofbottomabove
base (mm)
EffectiveOD(m)
ElasticmodulusE (MPa)
InertiaI (m4)
Platformwind shear
atBottom (N)
Total windshear atBottom
(N)
bendingmoment at
Bottom(N-m)
Deflectionat top (mm)
Top Ellipsoidal Head 4,370 3.41 186,300.0 * 0 2,580 837.3 0.03
Shell 1,530 3.43 186,300.0 0.1314 0 13,970 24,370.8 0.02
Bottom Ellipsoidal Head(top) 1,440 3.41 186,300.0 * 0 14,327.9 25,644.2 0
Support Skirt 0 3.41 195,300.0 0.05206 0 20,060.9 50,404.1 0
*Moment of Inertia I varies over the length of the component
Wind Pressure (WP) Calculations
Gust Factor (G¯) Calculations
Kz = 2.01 * (Z/Zg)2/α
= 2.01 * (Z/274.3200)0.2105
qz = 0.613 * Kz * Kzt * Kd * V2 * I= 0.613 * Kz * 1.0000 * 0.9500 * 50.00002 * 1.5000= 2,183.8125 * Kz
WP = qz * G * Cf (Minimum 0.48 kPa)= qz * G * 0.7000 (Minimum 0.48 kPa)
Design Wind Pressures
HeightZ
(m)Kz qz
(kPa)
WP:Operating
(kPa)
WP:Empty(kPa)
WP:Hydrotest
New(kPa)
WP: HydrotestCorroded
(kPa)
WP:Vacuum
(kPa)
4.6 0.8489 1.8548 1.1668 1.1668 N.A. N.A. 1.1668
6.1 0.9019 1.9707 1.2397 1.2397 N.A. N.A. 1.2397Design Wind Force determined from: F = Pressure * Af , where Af is the projected area.
Gust Factor Calculations
Operating, CorrodedEmpty, CorrodedVacuum, Corroded
39/43
![Page 41: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/41.jpg)
Gust Factor Calculations: Operating, Corroded
Vessel is considered a rigid structure as n1 = 49.4091 Hz ≥ 1 Hz.
z¯ = max ( 0.60 * h , zmin )= max ( 0.60 * 16.7490 , 15.0000 )= 15.0000
Iz¯ = c * (33 / z¯)1/6
= 0.2000 * (33 / 15.0000)1/6
= 0.2281Lz¯ = l * (z¯ / 33)ep
= 500.0000 * (15.0000 / 33)0.2000
= 427.0566Q = Sqr(1 / (1 + 0.63 * ((b + h) / Lz¯)0.63))
= Sqr(1 / (1 + 0.63 * ((9.2848 + 16.7490) / 427.0566)0.63))= 0.9500
G = 0.925 * (1 + 1.7 * gQ * Iz¯ * Q) / (1 + 1.7 * gv * Iz¯)= 0.925 * (1 + 1.7 * 3.40* 0.2281 * 0.9500) / (1 + 1.7 * 3.40 * 0.2281)= 0.8987
Gust Factor Calculations: Empty, Corroded
Vessel is considered a rigid structure as n1 = 73.2382 Hz ≥ 1 Hz.
z¯ = max ( 0.60 * h , zmin )= max ( 0.60 * 16.7490 , 15.0000 )= 15.0000
Iz¯ = c * (33 / z¯)1/6
= 0.2000 * (33 / 15.0000)1/6
= 0.2281Lz¯ = l * (z¯ / 33)ep
= 500.0000 * (15.0000 / 33)0.2000
= 427.0566Q = Sqr(1 / (1 + 0.63 * ((b + h) / Lz¯)0.63))
= Sqr(1 / (1 + 0.63 * ((9.2848 + 16.7490) / 427.0566)0.63))= 0.9500
G = 0.925 * (1 + 1.7 * gQ * Iz¯ * Q) / (1 + 1.7 * gv * Iz¯)= 0.925 * (1 + 1.7 * 3.40* 0.2281 * 0.9500) / (1 + 1.7 * 3.40 * 0.2281)= 0.8987
40/43
![Page 42: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/42.jpg)
Gust Factor Calculations: Vacuum, Corroded
Vessel is considered a rigid structure as n1 = 50.6065 Hz ≥ 1 Hz.
z¯ = max ( 0.60 * h , zmin )= max ( 0.60 * 16.7490 , 15.0000 )= 15.0000
Iz¯ = c * (33 / z¯)1/6
= 0.2000 * (33 / 15.0000)1/6
= 0.2281Lz¯ = l * (z¯ / 33)ep
= 500.0000 * (15.0000 / 33)0.2000
= 427.0566Q = Sqr(1 / (1 + 0.63 * ((b + h) / Lz¯)0.63))
= Sqr(1 / (1 + 0.63 * ((9.2848 + 16.7490) / 427.0566)0.63))= 0.9500
G = 0.925 * (1 + 1.7 * gQ * Iz¯ * Q) / (1 + 1.7 * gv * Iz¯)= 0.925 * (1 + 1.7 * 3.40* 0.2281 * 0.9500) / (1 + 1.7 * 3.40 * 0.2281)= 0.8987
Table Lookup Values
α = 9.5000, zg = 274.3200 m [Table 6-2, page 78]c = 0.2000, l = 500.0000, ep = 0.2000 [Table 6-2, page 78]a¯ = 0.1538, b¯ = 0.6500 [Table 6-2, page 78]zmin = 15.0000 ft [Table 6-2, page 78]gQ = 3.40 [6.5.8.1 page 26]gv = 3.40 [6.5.8.1 page 26]
41/43
![Page 43: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/43.jpg)
Jacket wt
Load Orientation Vertical LoadElevation above datum: 1,250 mmDirection angle: 0.00 degreesDistance from center of vessel: 0 mmMagnitude of force: 1,083 kg
Present when operating: YesIncluded in vessel lift weight: YesPresent when vessel is empty: YesPresent during hydrotest: Yes
42/43
![Page 44: Codeware, Inc. - HS ENG · Deficiencies Summary Warnings Summary Warnings for Support Skirt It is recommended that the skirt thickness be at least D/400 (warning) The Skirt/Legs/Saddles](https://reader030.vdocuments.mx/reader030/viewer/2022011817/5e808999912c1b0a02470b4e/html5/thumbnails/44.jpg)
Liquid Level bounded by Ellipsoidal Head #2
Location from datum 2,000 mm
Operating Liquid Specific Gravity 0.76
43/43