API 650 Tank Design 1foot Method

07/29/2015 Rev: 0

API 650 Storage Tank

TANK [tag] SHELL PLATE DESIGN CALCULATION by ONE FOOT METHOD D = Normal tank diameter , in feet

7.00

H = depth of tank , in feet

6.00

Shell Plate Design :

2.1 meters 1.8 meters

FROM ( BOTTOM COURSE) PLATE TO (TOP COURSE) PLATE

SG = design Specific gravity of liquid Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For First Course (Bottom) A36 Plate ;

Provided thickness:

0.9 23,200 1.00

160 Mpa

24,900 0.1180

171 Mpa 3.00 mm

20mm

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

0.004

0.09 mm

tt = 2.6(D)(H-1)/St =

0.004

0.09 mm

0.122 7.00 6.00 1.00 23,200 1.00

3.090 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet = H = depth of tank , in feet = SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For Second Course A36 Plate

24,900 0.1180

Provided thickness:

18.000

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

0.004

0.10 mm

tt = 2.6(D)(H-1)/St =

0.004

0.09 mm

0.066 7.00 0 1.00 23,200 1.00 24,900 0.0625

1.68 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For Third Course A36 Plate

Provided thickness:

16.000

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

-0.001

-0.02 mm

tt = 2.6(D)(H-1)/St =

-0.001

-0.02 mm

0.062 7.00 0 1.00 23,200 1.00 24,900 0.0625

1.57 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance

Seth A. Duazo Nass Mechanical

Page 1 of 4

FileName: 277905726.xls WorkSheet: Tank tag

07/29/2015 Rev: 0

API 650 Storage Tank

TANK [tag] SHELL PLATE DESIGN CALCULATION by ONE FOOT METHOD D = Normal tank diameter , in feet

7.00

H = depth of tank , in feet

6.00

For Fourth Course A36 Plate

Provided thickness:

2.1 meters 1.8 meters

12.000

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

-0.001

-0.02 mm

tt = 2.6(D)(H-1)/St =

-0.001

-0.02 mm

0.062 7.00 26.3632 1.00 21,300 1.00 24,900 0.0625

1.57 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For Fifth Course A36 Plate

Provided thickness:

10mm

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

0.022

0.55 mm

tt = 2.6(D)(H-1)/St =

0.019

0.47 mm

0.081 7.00 19.754 1.00 21,300 1.00 24,900 0.0625

2.06 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For Sixth Course A36 Plate

Provided thickness:

8mm

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

0.014

0.37 mm

tt = 2.6(D)(H-1)/St =

0.014

0.35 mm

0.076 7.00 13.194 0.9 21,300 1.00 24,900 0.0625

1.94 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance For Seventh Course A36 Plate

Provided thickness:

8mm

As per API 5.6.3.2 In US Customary units;

td = 2.6(D)(H -1)(SG)/Sd =

0.010

0.26 mm

tt = 2.6(D)(H-1)/St =

0.009

0.23 mm

0.071 7.00 6.63 1 21,300 1.00 24,900 0.0625

1.81 mm

td = Minimum shell course thickness plus C.A, in inches = D = Normal tank diameter , in feet H = depth of tank , in feet SG = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress A36 Hydro Test CA = Corrosion Allowance Seth A. Duazo Nass Mechanical

Page 2 of 4

FileName: 277905726.xls WorkSheet: Tank tag

07/29/2015 Rev: 0

API 650 Storage Tank

TANK [tag] SHELL PLATE DESIGN CALCULATION by ONE FOOT METHOD D = Normal tank diameter , in feet

7.00

H = depth of tank , in feet

6.00

2.1 meters 1.8 meters

BOTTOM PLATE DESIGN: As per API 650 11th Ed. 2009 Add. 2 Sect. 5.4.1;

Minimum Nominal Thickness excluding corrosion allowance, Inch Corrosion Allowance for Bottom Plate Required Thickness of Bottom Plate Used bottom plate thickness Minimum Nominal Width, Inch Used bottom plate Width,in

0.25 0.125 0.25 0.375 70.866 78.74

6.35 3.18 6.35 10 1800.0 2000.0

mm mm mm mm mm mm

ANNULAR BOTTOM PLATE DESIGN: As per API 650 11th Ed. 2009 Add. 2 Sect. 5.5.2;

Minimum Annular plate Width shall be =

215 tb ( GH )

or a Minimum of Annular Plate width provided; in

28.62

727 mm

23.622

600 mm

0.5

29.92 Where: tb = Annular plate thickness, mm H = maximum Design Liquid level, Meter G = liquid Specific gravity

760 mm

HENCE, OK.

ROOF PLATE DESIGN: ( Non Frangible roof Tank) As per API 650 11th Ed. 2009 Add. 2 Sect. 5.10.2.2,

Minimum Nominal Thickness excluding corrosion allowance = Corrosion Allowance for Roof Plate, = Required Thickness of Roof Plate = Used roof plate thickness =

0.1875 0 0.1875 0.1875

5 0 5 5

mm mm mm mm

SHELL STABILITY CHECK; As per API 650 11th Ed. 2009 Add. 2 Sect. 5.9.7.1

The Maximum height for the unstiffined shell shall be calculated as follows: H1 = 600,000*(t)*(((t/D)^3)^0.5)*(120 /V)^2 = , ft

23.82 7.26 Meters Where; H1 = Vertical Distance in ft, betwwen the intermediate wind girder and the top angle of the shell or the top wind girder of an open top tank t = as built thickness, unless otherwise specified of the thinnest shell course (in Inches) D = Nominal Tank height, Ft V = Designed wind speed (3 sec gust)mph

Seth A. Duazo Nass Mechanical

Page 3 of 4

FileName: 277905726.xls WorkSheet: Tank tag

07/29/2015 Rev: 0

API 650 Storage Tank

TANK [tag] SHELL PLATE DESIGN CALCULATION by ONE FOOT METHOD D = Normal tank diameter , in feet

7.00

H = depth of tank , in feet

6.00

Equivalent stable height of shell at ' t ' min. HE = sum He He = W( ' t 'min / ' t 'actual)^2.5 As per API 650 11th Ed. 2009 Add. 2 Sect. V.8.1.4 (b) Course Width (M) t' min (mm) 1 1.995 20.00 2 1.995 16.00 3 1.995 15.00 4 2.0 12.00 5 2.0 10.00 6 2.0 8.00 7 2.0 8.00 Minimum Shell Thickness = 8mm Transformed shell height,

W' tr

Maximum height of unstiffined shell=

2.1 meters 1.8 meters

Wtr (Meter) 0.202 0.353 0.414 0.726 1.145 2.000 2.000

6.840

Meters

7.26 Meters

H1 > Wtr, hence intermediate wind girder is not required

Seth A. Duazo Nass Mechanical

Page 4 of 4

FileName: 277905726.xls WorkSheet: Tank tag