34 0 19KB
UNREINFORCED BELLOWS DESIGN CALCULATION SHEET (EJMA NINETH EDITION) Client Name Enquiry No. Size Tag No. Type of Bellows
: : : : :
Quotation No. Quantity Drawing No.
TRIAD BELLOWS 1 24 BENCHMARK SINGLE UNREINFORCED
: : : : :
Date of Calculation Revision No.
123 1 0 15/10/2010 0
PRIME DATA Nominal Bore Dia Thickness of Plies
: :
24.000 NB 0.030 in.
No. of Plies
:
2.000
Pitch of Convolution Collar Length
: :
1.000 in. 1.000 in.
Height of Convolution Spool Length
: :
1.440 in. --- in.
Straight Face
:
0.000 in.
Weld Ends Thickness
:
0.000 in.
Bellows Internal Dia
:
24.000 in.
Bellows Outside Dia
:
27.000
in.
No. of Convolution
:
12.000
Collar Thickness Spool Mass
: :
0.000 ---
in. Lb
Weld Ends Length
:
0.000
in.
DESIGN DATA Design Temperature
:
Axial Movement(Ext)
:
Torsion Rotation
:
Min. Fatigue Cycle
:
Vibration
:
100.000
OF
Design Pressure
0.500 in. --- Deg 1.000 No
:
40.000 PSI
Design Pres.(Extr)
:
Angular Rotation
:
Axial Movement(Comp) :
1.000 in.
Lateral Def in Y plane Safety Factor Fatigue
:
0.060 in.
Lateral Def in Z plane
:
:
1.000
Annealed Bellows
:
No
Weld Factor Vacuum Condition
: :
--5.000 Deg --- in. 1.000 No
MATERIAL SPECIFICATION Bellows :
SA 240 GR 304
Below the Creep Range
:
No
Collar :
Weld Ends :
Spool :
End Fittings :
OUTPUT DATA S1
:
6,301.11 PSI
S'1
:
6,332.57 PSI
S2
:
2,802.25 PSI
S4
:
17,976.05 PSI
S5
:
667.61 PSI
S6
:
105,631.19 PSI
Factor (Cp) :
0.73
Factor (Cd)
1.53
:
S3
494.85 PSI
:
Factor (Ku)
Factor (Cf)
:
:
--1.47
Limiting DP on column Instability(Psc)
:
98.91
PSI
Limiting DP on In plane Instability(Psi)
:
106.05 PSI
Yield Strength Value by EJMA (S*y)
:
342.00
PSI
Yield Strength Value at RT by ASME (Sy)
:
49,602.91 PSI
Modulus of Elasticity at DT (Eb)
:
Thrust Force at Design Pressure
:
Lateral Spring Rate(LSR)
:
Axial Movement per Convolution
: :
Bellows Allowable Stress at DT by ASME(Sab) : Bellows Fatigue Cycle Life(Nc) :
19,870.17 PSI 88,564.29
Axial Spring Rate (Fiu)
:
1,111.80
Angular Spring Rate
:
5.28
Torsion Spring Rate(TS) Axial Vibration
: :
-----
Effective Area(Ae) Single Bellows Length (Lb)
: :
510.71 12.000
Over All Length of Bellows Assembly
:
---
Lb/in Deg Hertz
Thinning Thickness Due to Forming(Tp) Lateral Vibration
in^2 in.
Dual Bellows Length (Lu) Over All Length of Bellows Element
in.
Mean Diameter of Bellows (Dm)
: : : :
27,412,132
PSI
20,428.21 Lbs 6,009.34 0.25 in. 0.03 in. --- Hertz --- in. --- in. 25.50 in.
Above all the values and stresses are safe and acceptable as per EJMA NINETH Edition with respect to temperature, pressure and movement.