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U.S. Bellows U.S. BELLOWS, INC.
METALLIC EXPANSION JOINT CATALOG
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Expansion Joint Data Tables
 
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Universal Expansion Joint

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Flanged Universal Joint  

Flanged Universal Expansion Joint

 

3 inch, 3.5 inch, 4 inch Nominal Diameter

Notes:

  1. Rated life cycle at 650°F is 3000 cycles for any one tabulated movement.
  2. To combine axial, lateral and angular movements, please refer to the how to order section.
  3. To increase cycle life or movements, please refer to graph on cycle life.
  4. Rated bellows extension is equal to rated axial movement. Provided bellows is precompressed the amount of design extension. Installed overall length will decrease by the amount of precompression.
  5. Tabulated values are for tied joints, with butt weld ends. Performance of joints with flanged ends, and unrestrained joints, will exceed tabulated values.
  6. Maximum test pressure: 1.5 X rated working pressure.
  7. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  8. Pressure thrust load applied to adjacent pipe anchors/equipment when unrestrained expansion joints are used.

Size

Pressure

Non-concurrant Movements/Spring Rates

Lateral Movement/Spring Rates

Axial

24
in.
Overall Length
36
in.
Overall Length
48
in.
Overall Length

Movement

Spring Rate
610
mm
Overall Length
914
mm
Overall Length
1219
mm
Overall Length

Movement

Spring
Rate

Movement

Spring
Rate

Movement

Spring
Rate

PSIG

in.

lb./in.

in.

lb./in.

in.

lb./in.

in.

lb./in.

kg/cm2

mm

kg/mm

mm

kg/mm

mm

kg/mm

mm

kg/mm

3

75

3.17

16

8.93

3

14.93

1

2.05

152

5.3

81

0.3

227

0.05

379

0.02

52

3

500

1.33

91

3.39

18

5.49

7

0.71

1010

35.1

34

1.6

86

0.32

139

0.13

18

18

3.5

75

2.81

23

7.82

4

13.03

2

2

175

5.3

71

0.4

199

0.07

331

0.04

51

3

500

1.10

151

2.77

30

4.48

12

0.65

1355

35.1

28

2.7

70

0.54

114

0.21

17

24

4

50

3.43

19

9.41

3

15.61

1

2.71

111

3.5

87

0.3

239

0.05

396

0.02

69

2

275

1.44

106

3.53

22

5.66

9

0.92

775

19.3

37

1.9

90

0.39

144

0.16

23

14

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
50-75 PSIG Series: 150 lb. ANSI B16.5 RPSO.
275-500 PSIG Series: 300 lb. ANSI B16.5 RPSO
Plate flanges and angle flanges available for low pressure systems.
Pipe: ASTM A-53/A-106.
50-75 PSIG Series: Std. Wt. Pipe.
275-500 PSIG Series: Std. Wt. Pipe
Liners: A240-T304.
Covers: Carbon steel.
Tie Rods, Hinges, Gimbals: Carbon steel

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