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EJMA Report
SAMPLE - EJMA CALCULATION REPORT
Bellow Design Calculation - EJMA 7 1998 and 2000
Calculation
/2003/551
Revision:
0
Supplied by:
NN
Client:
CUMMINS
Drawing Number:
01-110-1270-00
Calculation Date:
19/09/03
Project No:
112
Drawing Revision:
0
Calculated By:
Rasheed
Project Desc:
EXPANSION JOINT
Item Number
5"
Design Data
Design Temp:
30 C
Axial Movement:
25.0 mm
Req. Fatique Cycles:
10000
Design Press:
0.3 MPs
Lateral Movement:
1.0 mm
Addit. Fatique Safety Factor:
1
Weld Factor:
1
Angular Rotation:
0.0 degr
Annealed Bellow:
No
Angular Rotation Max:
0.0 degr
Dimensions
Nominal Diameter:
130 mm
Total radius:
1.3 mm
Nipple Length:
0 mm
Bellow ID:
130.0 mm
Pitch:
8.0 mm
Pipe End Length:
0 mm
Bellow OD:
150.0 mm
Tangent End ID:
130.0 mm
Pipe End Thickness
0.0 mm
No. of Convol:
18
Tangent Length:
30 mm
Bellow Type:
Unspecified
No. of Layers:
3
Collar Length:
0 mm
Layer Thickness
0.30 mm
Collar Thickness:
0.0 mm
Materials
Bellow:
ASTM/SA-240 Grade 321
Pipe Ends:
Bellow Material's Yield:
206.8 MPs
Nipple:
Collar:
Bellow in Creep Range:
No
Calculation Results
Cd:
1.68
Rated Max Axial Movement:
65
mm
Allowed Cycles:
19,905
Cf:
4.58
Tot Equivalent Axial Movement:
27.5
mm
Convol Depth w:
9.1
mm
Cp:
0.67
Bellow Allowed Stress:
129.6
MPs
Bellow Length Le:
204
mm
S1:
21.8
MPs
Bellow E at Temperature:
194,612
MPs
Bellow Length Lb:
1444
mm
S1:
0.0
MPs
Bellow Yield at Temp. by EJMA:
416
MPs
Bellow Length Lb:
288
mm
S2:
10.0
MPs
Axial Spring Rate:
159
N/mm
Total Length:
144
mm
S3:
1.6
MPs
Lateral Spring Rate:
225
N/mm
Thickness tp:
0.29
mm
S4:
33.4
MPs
Bending Spring Rate:
7
Nm/degr
Effective Area Ae:
15,394
mmˆ2
S5:
10.6
MPs
Limiting Column Instability:
1.18
MPs
Factor Ku:
1.50
S6
1,034.9
MPs
Limiting Inplane Instability:
3.06
MPs
Trust Force:
5
kN
All dimensions are in mm unless otherwise specified. Subject to change without notice
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