1Equipment : Heater 10m2 ASME TS Calc : ASME Tubesheet
Input Echo, Tubesheet Number 1, Description: ASME Tubesheet
Shell Data: Shell Design Pressure Ps 3.00 kgf/cm^2 Shell
Operating Pressure Psox 1.00 kgf/cm^2 Shell Thickness ts 10.0000 mm
Shell Corrosion Allowance cas 1.6000 mm Inside Diameter of Shell Ds
324.000 mm Shell Circumferential Joint Efficiency Esw 0.700 Shell
Temperature for Internal Pressure Ts 100.00 C Shell Material SA-516
70
Note: Using 2 * Yield for Discontinuity Stress Allowable
(UG-23(e)), Sps. Make sure that material properties at this
temperature are not time-dependent for Material: SA-516 70
Shell Material UNS Number K02700 Shell Allowable Stress at
Temperature Ss 1406.14 kgf/cm^2 Shell Allowable Stress at Ambient
1406.14 kgf/cm^2
Channel Type: Cylinder Channel Design Pressure Pt 1.00 kgf/cm^2
Channel Operating Pressure Ptox 0.50 kgf/cm^2 Channel Thickness tc
10.0000 mm Channel Corrosion Allowance cac 1.6000 mm Inside
Diameter of Channel Dc 304.000 mm Channel Design Temperature TEMPC
50.00 C Channel Material SA-516 70
Note: Using 2 * Yield for Discontinuity Stress Allowable
(UG-23(e)), Sps. Make sure that material properties at this
temperature are not time-dependent for Material: SA-516 70
Channel Material UNS Number K02700 Channel Allowable Stress at
Temperature Sc 1406.14 kgf/cm^2 Channel Allowable Stress at Ambient
1406.14 kgf/cm^2
Tube Data: Number of Tube Holes Nt 15 Tube Wall Thickness et
1.4500 mm Tube Outside Diameter D 30.0000 mm Total Straight Tube
Length Lt 3006.00 mm Straight Tube Length (bet. inner tubsht faces)
L 2936.00 mm Design Temperature of the Tubes 100.00 C Tube Material
SA-249 TP304 Tube Material UNS Number S30400 Is this a Welded Tube
Yes Tube Material Specification used Wld. tube
Note: Welded Tube Material Spec. already includes a Joint Eff.
of 0.85. Since UHX checks Long. Tube stress, Jt. Eff. of long. seam
is not applicable. Increasing the Tube allowables by dividing by
0.85 for ASME UHX check.
Tube Allowable Stress at Temperature 1187.64 kgf/cm^2 Tube
Allowable Stress At Ambient 1195.22 kgf/cm^2 Tube Allowable Stress
at Temper.(for Pressure) 1187.64 kgf/cm^2 Tube Allowable Stress at
Temper. (for UHX) St 1397.22 kgf/cm^2 Tube Yield Stress At design
Temperature Syt 1734.09 kgf/cm^2 Tube Pitch (Center to Center
Spacing) P 52.0000 mm Tube Layout Pattern Triangular
Fillet Weld Leg af 2.0000 mm Groove Weld Leg ag 2.0000 mm
Tube-Tubesheet Joint Weld Type Full Strength Method for
Tube-Tubesheet Jt. Allow. UW-20 Tube-Tubesheet Joint Classification
c
Radius to Outermost Tube Hole Center ro 119.000 mm Largest
Center-to-Center Tube Distance Ul 0.0000 mm Length of Expanded
Portion of Tube ltx 0.0000 mm Tube-side pass partition groove depth
hg 0.0000 mm
Tubesheet Data:
Tubesheet TYPE: Fixed Tubesheet Exchanger, Conf B
Tubesheet Design Metal Temperature T 100.00 C Tubesheet Material
SA-266 2
Note: Using 2 * Yield for Discontinuity Stress Allowable
(UG-23(e)), Sps. Make sure that material properties at this
temperature are not time-dependent for Material: SA-266 2
Tubesheet Material UNS Number K03506 Tubesheet Allowable Stress
at Temperature S 1406.14 kgf/cm^2 Tubesheet Allowable Stress at
Ambient Tt 1406.14 kgf/cm^2 Thickness of Tubesheet h 35.0000 mm
Tubesheet Corr. Allowance (Shell side) Cats 1.6000 mm Tubesheet
Corr. Allowance (Channel side) Catc 1.6000 mm Tubesheet Outside
Diameter A 483.000 mm
Additional Data for Stepped Tubesheets: Is the Tubesheet
Stepped? NO
Area of the Untubed Lanes AL 0.0 cm^2
Additional Data for Fixed/Floating Tubesheet Exchangers:
Unsupported Tube Span under consideration l 1460.000 mm Tube End
condition corresponding to Span (l) k 0.80 Tubesheet Metal Temp. at
Rim T' 100.00 C Shell Metal Temp. at Tubesheet T'S 100.00 C Channel
Metal Temp. at Tubesheet T'C 50.00 C Perform Differential Pressure
Design N Run Multiple Load Cases YES Shell Side Vacuum Pressure
Pexts 3.0000 kgf/cm^2 Channel Side Vacuum Pressure Pextc 1.0550
kgf/cm^2
Mean Shell Metal Temp. along Shell len. Tsm 49.75 C Mean Tube
Metal Temp. along Tube length Ttm 37.50 C Junction Stress Reduction
option Perform Plastic Calculation
Additional Data for Gasketed Tubesheets: Tubesheet Gasket on
which Side Channel Flange Outside Diameter A 483.000 mm Flange
Inside Diameter B 304.000 mm Flange Face Outside Diameter Fod
380.000 mm Flange Face Inside Diameter Fid 325.000 mm Gasket
Outside Diameter Go 379.000 mm Gasket Inside Diameter Gi 329.000 mm
Gasket Factor, m 2.00 Gasket Design Seating Stress y 112.49
kgf/cm^2 Flange Facing Sketch Code Sketch 1b Column for Gasket
Seating Code Column II Gasket Thickness tg 3.0000 mm Full face
Gasket Flange Option Program Selects
Bolting Information: Diameter of Bolt Circle C 431.800 mm
Nominal Bolt Diameter dB 24.0000 mm Type of Thread Series TEMA
Metric Thread Number of Bolts n 12 Bolt Material SA-193 B7 Bolt
Material UNS Number G41400 Bolt Allowable Stress At Temperature Sb
1757.68 kgf/cm^2 Bolt Allowable Stress At Ambient Sa 1757.68
kgf/cm^2 Weld between Flange and Shell/Channel 0.0000 mm
Tubesheet Integral with Shell Tubesheet Extended as Flange Yes
Thickness of Extended Portion of Tubesheet Tf 27.0000 mm Is Bolt
Load Transferred to the Tubesheet Yes
Is Exchanger in Creep range (skip EP, Use 3S for Sps) NO
ASME TubeSheet Results per Part UHX, 2010
Elasticity/Expansion Material Properties:
Shell - TE-1 Carbon & Low Alloy Steels, Group 1Shell - TM-1
Carbon Steels with C Ft) = .85 * 3.1415 * 2.000 * (30.000 +
0.67*2.000 ) * 1397.22 = 1817.1385 kgf
Max. Allow. Tube-Tubesheet Joint load, Lmax = Ft = 1817.1385
kgf
Design Strength Ratio [fd]: = 1.0000
Weld Strength Factor [fw]: = Sot / ( Min(Sot, S) ) = 1.0000
Min Weld Length [ar]: = 2 *( ( (0.75 * do)^2+ 1.07*t*(do - t)*
fw * fd ) )^1/2 - .75 * do) = 1.9274 mm
Minimum Required Fillet Weld Leg afr 0.9637 mm Minimum Required
Groove Weld Leg agr 0.9637 mm
Tube-Tubesheet Jt allowable, 1817.14 is >= tube strength
1817.14 kgfNote: This tube-tubesheet joint is a Full Strength
joint
UHX-13.5.10 Step 10:
Shell Axial Membrane Allowable Stress: = Ss * Esw = 1406.14 *
0.70 = 984.30 kgf/cm^2
Axial Membrane Stress in Shell [Sigmasm_ax]: =
ao^2/((Ds+ts)*ts)* [Pe + (Rhos^2-1)(Ps-Pt)]+ as^2*Pt/((Ds+ts)*ts) =
134.000^2/((324.000 +10.0000 )*10.0000 )* [1.65 + (1.209^2-1) (3.00
-1.00 )] + 162.000^2*1.00 /((324.00 +10.0000 ) * 10.00 ) = 21.6743
kgf/cm^2
UHX-13.5.11 Step 11:
Note: For a given Shell thickness of 10.000 mm, the minimum
Shell length adjacent to the tubesheet should be 102.458 mm
The Shell Membrane Stress due to Joint Interaction [Sigmasm]: =
ao^2/((Ds+ts)*ts)[Pe + (Rhos^2-1)(Ps-Pt)]+ as^2*Pt/((Ds+ts)*ts) =
134.000^2/((324.000 +10.0000 )*10.0000 )[1.65 + (1.209^2-1) (3.00
-1.00 )] + 162.000^2*1.00 /((324.00 +10.0000 ) * 10.00 ) = 21.6743
kgf/cm^2
The Shell Bending Stress due to Joint Interaction [Sigmasb] =
6*ks/ts^2{betas[deltaS*Ps + as^2*PstarS/(Es*ts)] + 6(1 -
nu*^2)/(E*)(ao/h)^3(1 + h*betas/2)[Pe(Zv + Zm*Q1) + 2/ao^2* Zm * Q2
]} = 6 * 11640625 /10.0000^2{0.031 [ 0.001 * 3.000 + 162.0000^2 *
0.0000 /(20206290 ) ] + 6(1 - 0.26^2)/(1007283 )(134.00 /35.00
)^3(1 + 35.00 * 0.03 /2)[ 1.6 ( 0.191 + 0.770 * -0.088 ) +
2/134.00^2* 0.770 * -35.920 ] } = 36.9946 kgf/cm^2
Shell Stress Summation vs. Allowable |Sigmasm| + |Sigmasb|