UNREINFORCE BELLOWS DESIGN CALCULATION SHEET (EJMA NINTH

UNREINFORCE BELLOWS DESIGN CALCULATION SHEET (EJMA NINTH ... Above all the values and stresses are safe and acceptable as per EJMA NINTH Edition with ...
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UNREINFORCE BELLOWS DESIGN CALCULATION SHEET (EJMA NINTH EDITION) Client Name

: XYZ

Quotation No

:

5321

Users Name

: Deepak G

Drawing No

:

32134

Revision No

: 43

Calculated By

:

Deepak G

Tag No

: 11

Date of Calculation

:

10/08/2011

Type of Bellows

: DUAL UNREINFORCED

DESIGN DATA :

Design Pres.

: 100.000 PSI

Weld Factor

250.000

OC

Design Temp.

:

1.000

Min. Fatigue Cycle

:

1,000.000

Fatigue Safety Factor

:

1.000

Design Pres. (Extr)

:

--- PSI

Vibration

:

Axial Movement (Ext)

:

12.700 mm

Axial Movement (Comp)

:

--- Deg --- mm

Angular Rotation

:

Lateral Def in Z plane

:

Annealed Bellows

:

No of Convolution

:

No

No 25.400 mm

Torsion Rotation

:

--- Deg

Lateral Def in Y plane

:

50.800 mm

Vacuum Condition

:

No

Collar Thickness

PRIME DATA Nominal Bore Dia.

:

:

6.350 mm

Bellows Internal Dia.

:

609.000 mm Pitch of Convolution

0.000 NB

:

25.400 mm Collar Length

:

31.750 mm

Bellows Outside Dia.

:

685.200 mm Height of Convolution

:

36.580 mm Spool Length

:

710.800 mm

Plies Thickness

:

0.760 mm Straight Face

:

25.400 mm

:

--- Kg

No. of Plies

:

2.000

:

--- mm

:

--- mm

Weld Ends Thickness

4.000

Spool Mass Weld Ends Length

MATERIAL SPECIFICATION Bellows

: SA 240 GR 304

Collar

:

Below the Creep Range

:

Spool

:

No

SA 240 GR 304

Weld Ends

:

End Fittings

:

CALCULATED VALUE Factor (Cp)

:

0.734

S1

:

4,562.652 PSI

S4

:

45,169 PSI

Factor (Cd)

:

1.533

S'1

:

4,681.042 PSI

S5

:

1,128 PSI

Factor (Cf)

:

1.470

S2

:

7,449.271 PSI

S6

:

178,924 PSI

Bellows Fatigue Cycle Life (Nc)

:

S3

:

1,240 PSI

Thrust Force at Design Pressure

:

Axial Spring Rate per Convolution (Fiu)

:

18.782 Kg/mm

Lateral Spring Rate (LSR)

:

6.243 Kg/mm

Angular Spring Rate

:

Axial Movement per Convolution

:

--- Kgm/Deg 10.559 mm

Torsion Spring Rate (TS)

:

Rocking Vibration (Fn)

:

Mean Diameter of Bellows (Dm) Axial Vibration (Fn)

: :

647.100 mm --- Hertz

Effective Area (Ae) Lateral Vibration (Fn)

:

328,876 mm^2 --- Hertz

Single Bellows Length (Lb)

:

101.600 mm

Dual Bellows Length (Lu)

:

914.000 mm

Over All Length of Bellows Assembly

:

964.800 mm

Over All Length of Bellows Element

:

152.400 mm

4,323.904 50,975.941 Lbs

--- Kgm/Deg --- Hertz

Factor Ku :

1.119

Limiting DP on column Instability (Psc)

:

208.994 PSI

Limiting DP on In plane Instability (Psi)

:

83.455 PSI

Yield Strength Value by EJMA (S*y)

:

19,580.095 PSI

Yield Strength Value at RT by ASME (Sy)

:

30,022.812 PSI

Bellows Allowable Stress at DT by ASME (Sab):

17,694.604 PSI

Modulus of Elasticity at DT (Eb)

25,961,755.05 : PSI

Thinning Thickness Due to Forming (Tp)

: :

0.737 mm

CONCLUSION : Above all the values and stresses are safe and acceptable as per EJMA NINTH Edition with respect to temperature, pressure and movement.