Cálculo de Espessura de Tanque

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<p>TANK CACULATION</p><p>API 650 11th June 2007</p><p>TPHCM 15 Nov 2022</p><p>1 DATA DESIGN</p><p>Design Code API 650 11th June 2007</p><p>Type Of Tank Vertical tank</p><p>Type Of Bottom Flat</p><p>Type Of Roof Cone roof</p><p>Stored Liquid Water</p><p>Specific gravity of the Liquid G = 1</p><p>Tank Internal Diameter D = 3990 mm</p><p>Height Of Tank Shell Ht = 10000 mm</p><p>Design Liquid Level Ht = 10000 mm</p><p>Normal Fill Level H = 9650 mm</p><p>Hydrostatic Fluid Level H = 9650 mm</p><p>Minimum Fill Level 235 mm</p><p>Tank Design Capacity 125.04 m3</p><p>Tank Operation Capacity 120.66 m3</p><p>Internal Design Pressure Pi = 0 bar (gauge)</p><p>Design External Pressure Pe = 0 bar (gauge)</p><p>Design Temprature 40 °C</p><p>PWHT None</p><p>Corrosion Allowance CA = 0 mm</p><p>Mateial SS304</p><p>2 CALCULATION</p><p>2.1 Shell Thickness Calculation</p><p>Where</p><p>td = design shell thickness (mm)</p><p>tt = Hydrostatic test shell thickness (mm)</p><p>D = 4 Nominal diameter of tank (m)</p><p>H = design liquid level (m)</p><p>G = 1 specific gravity of the liquid to be stored</p><p>E = 0.7 joint efficiency (table S-4)</p><p>CA = - corrosion allowable (mm)</p><p>Sd = 155 allowable stress for the design condition (Mpa) (Table S-2a, S-2b)</p><p>St = 186 allowable stress for the hydrostatic test condition (Mpa) (Table S-2a, S-2b)</p><p>Ls = 1.5 Height of each course / wide of plate (m)</p><p>n = Number of course</p><p>tstd = Nominal thinkness listed in 5.6.1.1 except note 4</p><p>tsc = Thickness selected and used (refer S.3.2.1.1)</p><p>n H td tt tstd tcs Result</p><p>1st Course 1 10.0 1.7 1.5 5.0 5.0 OK</p><p>2nd Course 2 8.5 1.5 1.2 5.0 5.0 OK</p><p>3rd Course 3 7.0 1.2 1.0 5.0 5.0 OK</p><p>4th Course 4 5.5 0.9 0.8 5.0 5.0 OK</p><p>5th Course 5 4.0 0.7 0.6 5.0 5.0 OK</p><p>6th Course 6 2.5 0.4 0.3 5.0 5.0 OK</p><p>Last Course 7 1.0 0.1 0.1 5.0 5.0 OK</p><p>2.2 Bottom Thickness Calculation</p><p>Minimum thickness as per S.3.1.1 (tb1)</p><p>tb1 = 5 mm</p><p>Minimum thickness required tb = tb1 + CA</p><p>tb = 5 mm</p><p>Connection between the bottom plate and loweset course shell plate to be used Fillet Weld</p><p>Minimum size of Fillet Weld is 5mm</p><p>�� =</p><p>4.9� � − 0.3 �</p><p>�� �</p><p>+ ��</p><p>�� =</p><p>4.9� � − 0.3</p><p>�� �</p><p>2.3 Roof thickness design</p><p>Using self-support roof (5.10.5.1)</p><p>� = 17.72 Degree (slope = 9:20)</p><p>Minimum thickness t = greates of</p><p>(2.3.1)</p><p>or</p><p>(2.3.2)</p><p>and 5 mm (2.3.3)</p><p>Where</p><p>D = 3.99 nominal diameter if the tank (m)</p><p>Dl = 0.40 Dead load of roof (kPa)</p><p>Pe = 0</p><p>Lr = 0.16 kPa</p><p>T = Dl+Pe+0.4.Lr = 0.46 kPa</p><p>U = Dl+Pe+0.4.Lr = 0.46 kPa</p><p>=> Minimum thickness t = greates of (2.3.1) = 1.25 or (2.3.2) = 1.09 or(2.3.3)= 5 mm</p><p>Selected t = 5.00 mm</p><p>2.4 Intermediate Wind Girders</p><p>Calculation for and installation of intermediate wind girders are not required for small tank</p><p>� =</p><p>�</p><p>4.8����</p><p>�</p><p>2.2</p><p>� =</p><p>�</p><p>5.5����</p><p>�</p><p>2.2</p><p>2.5 Roof manhole</p><p>Table 5.13a, Figure 5.16</p><p>500 500 660 597 16 500 660 524 1050</p><p>Dia. Of</p><p>hole in</p><p>roof plate</p><p>Dp</p><p>Diameter of gasket</p><p>Inside Outside</p><p>Dia. Of</p><p>reinfocci</p><p>ng plate</p><p>Dr</p><p>Size of</p><p>manhole</p><p>Diameter of</p><p>neck</p><p>ID</p><p>Diameter of</p><p>cover plate</p><p>Dc</p><p>Diameter</p><p>of bole</p><p>circle</p><p>Db</p><p>Number of</p><p>Boles</p><p>2.6 Roof venting</p><p>5.8.5.2 API 650 Normal venting shall meet the requirments specified in API Std 2000</p><p>Normal diameter, Di 3990 mm</p><p>Tank height, H 10000 mm</p><p>Design Capacity 125.04 m3</p><p>Design pressure, Pi 0 bar (gauge)</p><p>Boiling point (NBP) A = 0.02 m2</p><p>= 16,815.45 mm2</p><p>Selected bleeder vent size 5" SCH40 6" SCH40 8" SCH40</p><p>Number of vent, N 1 1 1</p><p>Outside diameter of the vent, do 141 168 219 mm</p><p>Inside Dia. of one vent , di 134.5 161.5 211.6 mm</p><p>Total cross sectional area of vents, Av_actual 14,208 20,485 35,166 mm2</p><p>Safety ratio k = Av/A 0.84 1.22 2.09</p><p>Selected</p><p>� = �. �. 2��</p><p>� =</p><p>�</p><p>�. 2��</p><p>=</p><p>�</p><p>�</p><p>�</p><p>2��</p><p>2.7 Opening hole</p><p>a. Shell manhole 20"( D500)</p><p>OD = 508 mm Outside diameter of shell manhole (Selected)</p><p>Bolts size M20x Figure 5-7A</p><p>Bolts hole 23 mm Bolts hole diameter</p><p>tn = 5 mm neck of manhole thickness (Table 5-4a)</p><p>t = 5 mm Compted above</p><p>T = 5 mm</p><p>Db = 667 mm Figure 5-8</p><p>Dc = 730 mm Figure 5-8</p><p>tc = 14 mm Thickness of shell manhole cover Plate (Table 5-3a)</p><p>tf = 14 mm Thickness of shell manhole Bolting flange (Table 5-3a)</p><p>b. Other opening holes</p><p>As per section S.3.3.1 the minimum thickness of connections and openings shall be as table</p><p>Size of nozzle Minimum Nominal Neck Thickness</p><p>NPS 2 and less Schedule 80</p><p>NPS 3 and NPS 4 Schedule 40</p><p>Over NPS4 6 mm</p>