rectangular
TRANSCRIPT
RECTANGULAR TANK CALCULATION
PROJECT NAME :CLIENT :DATE :
TANK DATA
Design Temperature =Height of Tank [millimeter] =Width of Tank [millimeter] =Length of Tank [millimeter] =Larger I
Density of Liquid =Specific Gravity of Water for Hydrotest =Corrosion Allowance =Modulus of elasticity (E) =Stress Value of Plate (S) =
Bottom Roof
B
L L
Stiffening Material
H.1 = 0.6.B : 54.3168 inc = 1.37965 mH.2 = 0.4.B : 36.2112 inc = 0.91976 m
H.1/L = 0.23 a = 0.001H.2/L = 0.15333333 a = 0.0005
h.1 = 54.3168h2 = 90.528
(kg/m3)
load (W) = (0.036.G.H2)/2 = 53.1056657 lb/incR.1 = 0.7 X W.1 = 37.173966
Required moment of inersia1.25 X R.1 = 46.4674575053
L3/E = 0.44
I (inersia ) = 20.400775475 in4 L6X6X9/16 = 22.1 in4
Required Plate Thickness
t = 2.45 L X a Pn/S Pn = 0.036 G (hn-1 + hn)/2
Pn1 = 0.98 0.000000071106
t = 0.1543 inc = 3.91884542 mm
Pn2 = 2.61 0.0000000948
t = 0.178153 inc = 4.52509291 mm
Rata tebal plat dinding = Req Plate Thickness + corrosion allowanceTebal plat = 0.18 inc = 4.52509291 mm
Tebal Plat dinding design = 6 mm = 0.2358 inc
Maximum Distance Between Stiffenings
H/L = 0.4 a = 0.004
l =
= 110.1878826 inc 2.79877222 m
Maximum jarak Stiffening Vertical = 2.5 m = 98.4225 inc
Required Section modulus of Area l/H
aPn/S =
aPn/S =
0.455Xt (1/a) (S/(0.036 G H)
H/l = 0.91978968 a = 0.017
Z = l X 0.036 X G X H3 X G/(16 X S) 2.58 inc3
Section modulus of the tank plate
Z = l t2/60.9121 inc3
Minimum Required section modulus of stiffenings
Z = 1.67 inc3
Bottom Plate When support by Beams
t = l1.254 (S/0.036 GH)
Number of beam = 4 , l = 0.8 m = 31.49 inc
t = 0.0043 inc = 0.10847191
Minimum Shell Thickness (t min)
a. Minimum shell thickness (t min) pelat sisi
t min =
= 3.73 mm
b. Minimum shell thickness (t min) pelat bawah
t min =
P sisi
= 5.90 mm
Tank Weight
Self Weight = 76.910Bar Weight = 97.5 Kg/m [bar = L 50 x 50 x 5 mm]
=Surface Area = Side + Cover + Bottom + ( rear and front)
= (12x2.7x2) + (12x2.4x1) + (12x2.4x1) + (12x2.4x1) + (2.4x2.7x2)
= 0.00Bar Length = Brazing Bar + Vertical Bar + Transvelsal Angel Bar
= (3.36x12) + (2.7x10) + (2.4x10)
= 0.06716Total Weight = Plate Weight + Bar Weight (Empty Weight)
= (164.16 x 76.91) + (91.32 x 97.5)= 6.55 kg
Fluid Weight = Total water capacity= ρ x total tank volume
= x= 0.00 kg
Total Full Tank Weight = Total Weight + Fluid Weight on Hydrotest= 6.55 + 0.00 = 6.55 kg
AssumptionPlate Thickness = 5.00 mmWeld Join Efficiency = 0.85 %
Self Weight = 76.91
Vertical Beam
Line load on beam Wind Loadw = (1/10^9) x r x H x L Wind Pressure
= 0.00000276 kgf/mm q ==
Maximum Moment Line Load
= 1/20 (W x H^2) w == 0 kgf.mm =
Required section modulus of beam Total Moment
= Mn =
= #VALUE! =
Kg/m2
m2
m2
[During Hydrotest]
1000 kg/m3 [12 x 2.7 x 2.4]m3
Kgf/m2
Mmax
Z0 Mmax/σb
mm3
Maximum Deflection= 0.157 x w x H^4 Modulus Maximum
120 x E x I Z0 =
= 1.8987E-01 mm =For Vertical Beam L Profile is suitable
Horizontal Beam
Line Load Due Static Pressurew = 1/10^9 x r x h1^2/8
= 0.32805 kgf/mm
w = 1/10^9 x r x h1 x h2/2= 0.8748 kgf/mm
Maximum Bending Moment
= w x I^2/12= - kgf.mm
= w x I^2/12= - kgf.mm
Required Section Modulus of Beam
=
= #VALUE!
=
= #VALUE!
For Horizontal Beam L Profile 50 x 50 x 5 is suitableMaximum Deflection
d = w x I^4384 x E x I
= 1.99E+01 mm
Horizontal Beam 1
Static Loadw = 1/10^9 x r x h1^2/8
= 0.32805 kgf/mm
Maximum Moment
= w x I^2/12= 0 kgf.mm
Mmax
Mmax
Z0 Mmax/σb
mm3
Z0 Mmax/σb
mm3
Mmax
Required Modulus
=
= #VALUE!
For Cover Plate L Profile 65 x 65 x 6 is suitable
Deflectionδ = w x I^4
384 x E x I= #VALUE! mm
Horizontal Beam 2 (centre Beam)
Static Loadw = 1/10^9 x r x h2^2/8
= 0.8748 kgf/mm
Maximum Moment
= w x I^2 / 12= - kgf.mm
Required Section Modulus of Beam
=
= #VALUE!
For Cover Plate L Profile 50 x 50 x 5 is suitable
Stress Connection Between Bottom Plate and Vertical Stiffener
= 0.001659952
σB = 3.4((E x Qo)2 x w)^(1/3)= 7.839515621 kgf/mm
Summary
Plate ThicknessSide : 2.00 mmBottom : 5.00 mmCover : 2.00 mm
Beam L Profile 50 x 50 x 5 is adequated for stiffener
Z0 Mmax/σb
mm3
Mmax
Z0 Mmax/σb
mm3
Toϴ
Ambient2.30 m 90.528 inc2.40 m 94.464 inc6.00 m 236.16 inc
280.00 m31.00
0.0015875 m 0.062484 in 30,000,000.00 13,750.00 ( Using SA 285 C Material )
H.1
B H.2
#VALUE! b=805
#VALUE! b=805
[bar = L 50 x 50 x 5 mm]
Wind LoadWind Pressure
0.00 r=20090.9945
0.0737055 kgf/mm 0.0737055 h1=1620
Total Moment
859,184 kgf.mm -
During Hydrotest]
60 x √H
1/106 x q x h1/2
1/12 x w x I2
Modulus Maximum
1,205.87 0.00
#VALUE!
0.32805 r=1000 h1=1620
0.8748 r=1000 h1=1620h2=1080
#VALUE!
0.32805 r=1000 h1=1620
Mmax/1.5σb
mm3
0.8748 r=1000 h1=1620h2=1080
RECTANGULAR TANK CALCULATION
Project : PLTG SENIPAH 2 X 41 MW , KALIMANTAN TIMURClient : KPMOGDate : September 2012
Data Process :Volume : 250 bbl or 39.74 m3Vapor space : 25 bbl 3.95 m3
43.69 m3Liquid : Condensate , down stream SperaratorDensities : 39 lb/cuft
624.7 kg/cumTemperatur : 87.8 ⁰ F
31 ⁰ CPressure : atmosphericFilling rate : 11524.1 lb/hr 259 cuft/hrWithdrawal Rate : 2.6 GPM
Mechanical Design Data for calculationMinimum RequirementVolume : 44 m3 - Length L : 5.968 m 234.96 In - Wide : 2.498 98.33 In - Hight H : 2.990 117.72 In
44.57 M3Surface area bottom 14.91 m2Surface area shell 17.84 m2Weight liquid 44,000.00 kgH/L 0.501005α 0.006Liquid density : 1000 kg/m3Sg. as Water : 1Corrosion allowance 0 Bottom Plate ### kg/cm2Material : SA-36 Shell Plate Pr ### kg/cm2Modulus elastisity E : 30,000,000 Stress Value of plate S : 11600 psi Ration betwe 2
0.5UL 142 : 17.21 , Minimum Plate thicknessTanks of this type shall be constructed from steel not thinner than 0.093 inch (2.36 mm) if of carbon steel or0.071 inch (1.80 mm) if of stainless steel.
Use Bottom Plate : 6.00 mmUsed shell plate : 4.00 mm
STIFFENER17.1.1 Stiffening bars may be attached to the tank wall either by intermittent or continuous welding and may be placedon the inside or outside of the tank walls.Vertical Shell Stifener
W = 498.86
R1 = 0.3 X W 149.66 R2 = 0.7 X W 349.20
Momen enertia minimum I = 1.25 x R1 x L^3 /E 10.17
Beam as bottom Supportt = L /(1.254 x ( S /(0.036 x G x H))^.5) 3.58
17.1.2 Tie rods may be used inside of the tank.17.1.3 Baffles may be tack welded or continuously welded on the inside of the tank.
Ratio Vertikal / Horisontal 1.19714926329276
Factor β1
0.036 X G X H² /2
In⁴