Rectangular Tank Calculation

Rectangular Tank Calculation Sheet

of 38

TANK CALCULATION SHEET

I. DESIGN PARAMETERS:

- Code Design : API 650 & Roark's Formulas

- Design pressure Full water + 5 kPag= 22.27 kPa

- Design temperature : 60- Operating pressure : ATM

- Operating temperature : 27- Corrosion Allowance C.A : 0 mm- Liquid Specific Gravity : 1.00- Joint Efficiency : 0.85 (For Shell)

: 1.00 (For Roof & Bottom)- Elastic Modulus E : 2.9*E+7 psi

= 199947962 kParetangular

MATERIAL SPECIFICATION: :- Shell, Roof & Bottom : SS 316L

- Allowable Stress 16700 psi= 115142 kPa

- Nozzle Neck : A 182 F 316L- Flange : A 182 F 316L- Pipe Fittings : A 312 TP 316L- Bolts & Nuts : A 193 Gr B8M / A 194 Gr 8M- Stiffeners : SS 316L

TANK GEOMETRY:- Height H : 1760 mm- Length L : 1219 mm- Width W : 1066 mm

Pd :

oC / AMB

oC

Sa :

Width (W)

Heigh

t (H)


of 38

II. DESIGNII.1 Side Wall Plate Calculation (Height x Length)II.1.1 Wall Thickness Calculation(As per Roark's Formulas 7Th Ed, Table 11.4 Case 1a)

Vertical length without reinforced a : 587 mmHorizontal length without reinforced b : 406 mm

Ratio, a/b : 1.44α = 0.0797β = 0.4658

Required thickness

= 3.86 mm

Adopted thickness 6.00 mmMaximum deflection

= 1.12 mm

< 1.12mm < 3mm

Therefore, adopted thickness is satisfactory

II.1.2 Top Edge Stiffener

= 0.39 kN/m

= 4.18 kN/m

Moment inertia required:

= 46.38

= 0.0046Moment inertia of used stiffener (Flat bar 65x6):

= 13.7 Therefore, Top edge stiffener is satisfactory

II.1.3 Horizontal StiffenerMoment inertia required:

= 494.69


= 13.7 Therefore, Horizontal stiffener is satisfactory

tr = Sqrt(β*Pd*b2)/Sa) + C.A

ta :

Ymax = α*Pd*b4/(E*ta3)

Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a

Jmin = R1*b4/(192*E*ta) mm4

cm4

Jx = Jy cm4


cm4

Jx = Jy cm4

Heigh

t (H)

a

b

Length (L)

a

b

Stiffeners

a

b

a

b


of 38

II.1.4 Vertical Stiffener

338.68 mm

Maximum bending moment:

= 0.07 kNmRequired section modulus:

= 5.78E-07

= 0.58Section modulus of used stiffener (Flat bar 65x6):

Z = 4.2 Therefore, Vertical stiffener is satisfactory

II.2 Side Wall Plate Calculation (Height x Width)II.2.1 Wall Thickness Calculation(As per Roark's Formulas 7Th Ed, Table 11.4 Case 1a)


Ratio, a/b : 1.65α = 0.0934β = 0.5301

Required thickness

= 3.60 mm


= 0.77 mm

< 0.77mm < 3mm



= 0.39 kN/m

= 4.18 kN/m


= 27.12


= 13.7

Maximum bending moment at Hy = 0.5773*amax =

Mmax = 0.0641*Pd*b*Hy2

Zr = Mmax/Sa mm3

cm3

cm3


ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4

Heigh

t (H)

ab

ab

Stiffeners

ab

ab

Width (W)


of 38

Therefore, Top edge stiffener is satisfactory


= 289.30




338.68 mm



= 5.05E-07



II.3 Roof Plate Calculation

Loads on roof plate:

- Roof area: = 1.299454- Live load: = 1.5 kPa- Roof weight: = 111 kg- Roof structure weight: = 116 kg- Roof Equipment weight: = 120 kg- Dead load: = 2.6 kPaTotal load on roof plate: = 4.1 kPa

Distance without reinforced in width a : 533 mmDistance without reinforced in length b : 609.5 mm

Ratio, a/b : 0.87α = 0.0332β = 0.2297

Required thickness:

= 1.75 mm

Adopted thickness 6.00 mmMaximum deflection:


cm4

Jx = Jy cm4



Zr = Mmax/Sa mm3

cm3

cm3

m2


ta :

Stiffeners

Widt

h (W

)

Length (L)

aa

bb


of 38

= 0.44 mm

< 0.44mm < 3mm


II.4 Bottom Plate Calculation


Ratio, a/b : 0.87α = 0.0332β = 0.2297

Required thickness:

= 4.06 mm


= 1.00 mm

< 1mm < 4mm



Ymax 1/2 ta


ta :


Ymax 1/2 ta

a

b

a

b

Stiffeners

a

b

a

b

Width

(W)

Length (L)


of 38


of 38













Pd :

oC / AMB

oC

Sa :

Width (W)

Heigh

t (H)


of 38


of 38



Ratio, a/b : 1.07α = 0.0504β = 0.3185

Required thickness

= 5.13 mm


= 1.82 mm

< 1.82mm < 4mm



= 0.49 kN/m

= 5.25 kN/m


= 240.32

= 0.0240Moment inertia of used stiffener (angle 65x65x6):



= 2563.43




ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4


cm4

Jx = Jy cm4

Heig

ht (H

)

a

b

Length (L)

a

b

Stiffeners

a

b

a

b


of 38


of 38


384.87 mm



= 1.26E-06

= 1.26Section modulus of used stiffener (angle 65x65x6):




Ratio, a/b : 1.21α = 0.0624β = 0.38

Required thickness

= 4.96 mm


= 1.37 mm

< 1.37mm < 4mm



= 0.49 kN/m

= 5.25 kN/m


= 146.71





Zr = Mmax/Sa mm3

cm3

cm3


ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4

Heigh

t (H)

a

b

a

b

Stiffeners

a

b

a

b

Width (W)


of 38


= 1564.91




384.87 mm



= 1.12E-06






Distance without reinforced in width a : 1100 mmDistance without reinforced in length b : 700 mm

Ratio, a/b : 1.57α = 0.0886β = 0.5076

Required thickness:

= 2.29 mm


= 1.19 mm

<


cm4

Jx = Jy cm4



Zr = Mmax/Sa mm3

cm3

cm3

m2


ta :


Ymax 1/2 ta

Stiffeners

Widt

h (W

)

Length (L)

aa

bb


of 38

1.19mm < 3mm Therefore, adopted thickness is satisfactory


of 38



Ratio, a/b : 0.88α = 0.0341β = 0.2341

Required thickness:

= 4.40 mm


= 1.23 mm

< 1.23mm < 4mm



ta :


Ymax 1/2 ta

a

b

a

b

Stiffeners

a

b

a

b

Width

(W)

Length (L)


of 38


of 38













Pd :

oC / AMB

oC

Sa :

Width (W)

Heigh

t (H)


of 38


of 38



Ratio, a/b : 1.05α = 0.0487β = 0.3096

Required thickness

= 5.15 mm


= 1.88 mm

< 1.88mm < 4mm



= 0.49 kN/m

= 5.25 kN/m


= 257.95




= 2751.49




ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4


cm4

Jx = Jy cm4

Heig

ht (H

)

a

b

Length (L)

a

b

Stiffeners

a

b

a

b


of 38


of 38


384.87 mm



= 1.29E-06





Ratio, a/b : 1.07α = 0.0504β = 0.3185

Required thickness

= 5.16 mm


= 1.85 mm

< 1.85mm < 4mm



= 0.49 kN/m

= 5.25 kN/m


= 244.64





Zr = Mmax/Sa mm3

cm3

cm3


ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4

Heigh

t (H)

a

b

a

b

Stiffeners

a

b

a

b

Width (W)


of 38


= 2609.51




384.87 mm



= 1.27E-06







Ratio, a/b : 1.75α = 0.0989β = 0.5559

Required thickness:

= 2.40 mm


= 1.39 mm

<


cm4

Jx = Jy cm4



Zr = Mmax/Sa mm3

cm3

cm3

m2


ta :


Ymax 1/2 ta

Stiffeners

Widt

h (W

)

Length (L)

aa

bb


of 38

1.39mm < 3mm Therefore, adopted thickness is satisfactory


of 38



Ratio, a/b : 0.99α = 0.0435β = 0.283

Required thickness:

= 4.93 mm


= 1.68 mm

< 1.68mm < 4mm



ta :


Ymax 1/2 ta

a

b

a

b

Stiffeners

a

b

a

b

Width

(W)

Length (L)


of 38


of 38













Pd :

oC / AMB

oC

Sa :

Width (W)

Heigh

t (H)


of 38


Vertical length without reinforced a : 500.0 mmHorizontal length without reinforced b : 525 mm

Ratio, a/b : 0.95α = 0.0401β = 0.2652

Required thickness

= 3.95 mm


= 1.74 mm

< 1.74mm < 3mm



= 0.37 kN/m

= 3.94 kN/m


= 121.80




= 1299.20




ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4


cm4

Jx = Jy cm4

Heigh

t (H)

a

b

Length (L)

a

b

Stiffeners

a

b

a

b


of 38


288.65 mm



= 6.00E-07





Ratio, a/b : 1.20α = 0.0616β = 0.3762

Required thickness

= 3.74 mm


= 1.06 mm

< 1.06mm < 3mm



= 0.37 kN/m

= 3.94 kN/m


= 48.32


= 13.7



Zr = Mmax/Sa mm3

cm3

cm3


ta :


Ymax 1/2 ta

R1 = 0.03*Pd*a

R2 = 0.32*Pd*a


cm4

Jx = Jy cm4

Heigh

t (H)

ab

ab

Stiffeners

ab

ab

Width (W)


of 38

Therefore, Top edge stiffener is satisfactory


= 515.46




288.65 mm



= 4.76E-07







Ratio, a/b : 1.79α = 0.1011β = 0.5662

Required thickness:

= 2.70 mm



cm4

Jx = Jy cm4



Zr = Mmax/Sa mm3

cm3

cm3

m2


ta :

Stiffeners

Widt

h (W

)

Length (L)

aa

bb


of 38

= 1.70 mm

< 1.7mm < 3mm




Ratio, a/b : 1.19α = 0.0607β = 0.3718

Required thickness:

= 4.68 mm


= 1.11 mm

< 1.11mm < 4mm



Ymax 1/2 ta


ta :


Ymax 1/2 ta

a

b

a

b

Stiffeners

a

b

a

b

Width

(W)

Length (L)


of 38

THANG LONG

ITEM NO. NAMET-6601 CORROSION INHIBITOR TANK 2.22 1219 1066 1760T-6603 POUR POINT DEPRESSANT TANK 12.02 5600 1100 2000T-6605 BACK UP CHEMICAL TANK 2.22 1219 1066 1760T-6607 DEMULSIFIER TANK 2.22 1219 1066 1760

DONG DOT-6621 CORROSION INHIBITOR TANK 2.22 1219 1066 1760T-6622 POUR POINT DEPRESSANT TANK 13.93 5700 1250 2000T-6623 DEMULSIFIER TANK 2.22 1219 1066 1760T-6624 H2S SCAVENGER TANK 5.13 2100 1250 2000T-6629 BACK UP CHEMICAL TANK 2.22 1219 1066 1760T-6636 SCALE INHIBITOR TANK 2.22 1219 1066 1760

DESIGN CAPACITY (m3)

LENGTH (mm)

WIDTH (mm)

HEIGHT (mm)

HEIGHT X LENGTH HEIGHT X WIDTH ROOF PLATE BOTTOM PLATE

6 587 406 6 587 355 6 533 609.5 8 533 609.58 667 700 8 667 550 6 1100 700 8 550 7006 587 406 6 587 355 6 533 609.5 8 533 609.56 587 406 6 587 355 6 533 609.5 8 533 609.5

6 587 406 6 587 355 6 533 609.5 8 533 609.58 667 712.5 8 667 625 6 1250 712.5 8 625 712.56 587 406 6 587 355 6 533 609.5 8 533 609.56 500 525 6 500 417 6 1250 700 8 625 7006 587 406 6 587 355 6 533 609.5 8 533 609.56 587 406 6 587 355 6 533 609.5 8 533 609.5

t (mm)

a (mm)

b(mm)

t (mm)

a(mm)

b(mm)

t (mm)

a (mm)

b(mm)

t (mm)

a (mm)

b (mm)

mw nozz accessary dry

4 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 0.994 10 4 3 2 9 3 10 753 1160 2344 766 63 20 20 144 3357 0.914 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 0.7814 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 1.02

4 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 0.994 10 4 3 2 9 3 10 753 1160 2513 776 63 20 20 148 3541 0.914 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 1.025 5 5 4 2 4 3 5 390 1160 913 195 63 20 20 77 1289 0.9984 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 0.784 4 4 4 3 3 3 3 390 1160 517 119 63 20 20 53 792 1.3

A(L) (mm2)

A(U) (mm2)

binh(kg)

tang cung(kg)

Base frame

specificgravity

operating

2 1980 2772 301310.85 9873.5 13231 15379

2 1562 2354 30132 2040 2832 3013

2 1980 2772 301312.63 11493.3 15034 17471

2 2040 2832 30134.6 4590.8 5879 64222 1560 2352 30132 2600 3392 3013

capacityworking

luu chat(kg)

hydrotest

Rectangular Tank Calculation

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