AS AÇÕES DO VENTO

MEMORIAL DE CÁLCULO TANQUE TIER III

DADOS:

SOFTWARE DE CALCULO: AMETank 7.7

NORMA DE PROJETO: API 620

DIAMETRO INTERNO: 3820 mm

ALTURA DO CORPO: 8000 mm

TEMPERATURA MINIMA: 4 ºC

TEMPERATURA MAXIMA: 20 ºC

PRESSÃO DE OPERAÇÃO: 0,3 Kgf/cm ²

MATERIAL: ASTM A-36

TABLE OF CONTENTS

Summary of Design Data and Remarks 

Tank Design Parameters 

Roof Design 

Top Member Design 

Shell Design 

Bottom Design 

Site Ground Motion 

Seismic Design 

Wind Design Pressures 

Wind Design 

Anchorage Design 

Normal and Emergency Venting (API-2000) 

Capacities And Weight 

---

Back 

SUMMARY OF DESIGN DATA AND REMARKS

Overview
Job = 2014-12-10-23-44
Calculations Date = 10-Dec-2014
Manufacturing or Inspection Date =
Designer = Alan Cavalcante
Project =
Tag Number =
Plant = PURCHASER DESCRIPTION CITY AND STATE
Plant Location =
Site =
Design Basis = API-620 ()

Tank Nameplate Information

Pressure Combination Factor	N/A
Design Standard	API-620 ()
Appendicies Used	L, R
Roof	A36 : 0.25 in
Shell (1)	A36 : 0.3752 in
Shell (2)	A36 : 0.3752 in
Shell (3)	A36 : 0.3126 in
Shell (4)	A36 : 0.3126 in
Shell (5)	A36 : 0.25 in
Shell (6)	A36 : 0.25 in
Bottom	A36 : 0.25 in

Designer Remarks
Remarks or Comments

SHELL DESIGN
Shell Courses

Course #	Course Height (ft)	Material	Corrosion Allowance (in)	Joint Efficiency	Sd (lb/in^2)	Weight New (lbf)
1	4.9213	A36	0	0.7000	16000.0000	2965.8306
2	4.9213	A36	0	0.7000	16000.0000	2965.8306
3	4.9213	A36	0	0.7000	16000.0000	2470.9985
4	4.9213	A36	0	0.7000	16000.0000	2470.9985
5	4.9213	A36	0	0.7000	16000.0000	1976.1665
6	1.6404	A36	0	0.7000	16000.0000	658.7244

Shell Courses (continued)

Course #	Weight CA (lbf)	t-min Erection (in)	t-min Internal Pressure (in)	t-min Seismic (in)	t-min External Pressure (in)	t-actual (in)
1	2965.8306	0.1875	0.1050	0.0410	0	0.3752
2	2965.8306	0.1875	0.0906	0.0334	0	0.3752
3	2470.9985	0.1875	0.0763	0.0257	0	0.3126
4	2470.9985	0.1875	0.0620	0.0181	0	0.3126
5	1976.1665	0.1875	0.0477	0.0105	0	0.2500
6	658.7244	0.1875	0.0334	0.0027	0	0.2500

Back 

TANK DESIGN PARAMETERS
D (Tank diameter) = 12.5328 ft
DL_added (Added dead load) = 0 psf
E (Tank Joinf efficiency) = 0.7
H_shell (Shell height) = 26.2467 ft
Liq_max (Maximum liquid level) = 26.2467 ft
Liq_min (Minimum liquid level) = 0 ft
Lr (Minimum roof live load) = 20.0 psf
Pg (Design pressure) = 4.2641 psi
Pv (Design vaccum) = 0.0 psi
S (Snow load) = 0.0 psf
SG (Specific gravity of content) = 1
T (Design temperature) = 4 degf
T_max_op (Max operating temperature) = 20 degf
T_min (Min design temperature) = 30 degf
V (Design wind velocity) = 125.0 mile/hr
site_ground_motion_input_mode (Site Ground Motion Input Mode) = asce7 mapped ss and s1
water_density (Water Density) = 62.37 lbf/ft^3
wind_method (Wind Method) = api 620 method


Product density
product_density = water_density * SG = 0.0361 * 1 = 0.0361 lbf/in^3

Test pressure API-620 7.18.3.4
Pt = 1.25 * Pg = 1.25 * 4.2641 = 5.3301 psi

API 620 Appendix R applied.
API 620 Appendix L applied.

Back 

ROOF DESIGN
(Material) = A36
(Knuckle material) = A36
E (Joinf efficiency) = 0.7
Rc (Shell radius) = 6.2664 ft
Rs (Dish radius) = 10.0262 ft
c (Corrosion allowance) = 0 in
density_ins (Insulation Density) = 8 lbf/ft^3
t_act (Actual thickness) = 0.25 in
t_ins (Insulation thickness) = 0 in
t_knuckle (Knuckle actual thickness) = 0.25 in

Material density (density) = 0.2833 lbf/in^3
Maximum allowable tensile stress (Sts) = 16000.0 psi
As per API-620 Table 5-6, Erection Thickness (t_erection) = 0.1875 in

Corroded plates thickness
t_corr = t_act - c = 0.25 - 0 = 0.25 in

Geometry Calculations

Geometries

...