Types of Expansion Joints Types of Movements Rectangular / Square Bellows Recommended Installation
RECOMMENDED INSTALLATION INSTRUCTION
Metal Bellows Expansion joints have been designed to absorb a specified amount of movement by flexing of the thin-gauge convolutions. If proper care is not taken during installation, it may reduce the cycle life and the pressure capacity of the Expansion joints which could result in an early failure of the bellows element or damage the piping system. See table given below.
Recommendation for Installation
Yellow Shipping Rods are to be removed after installation and prior to pressure test of equipment.
Install assembly as per flow direction, if marked.
Remove any foreign material that may have become lodged between the convolution.
Protect bellows from weld spatter.
Do not use cleaning agent which contains Chlorides.
Do not use steel wool and wire brush on the bellows membrane.
Do not stretch, compress or off-set the expansion joint to fit the piping system, other wise the expansion joint may be over stressed when the system is in service.
Do not exceed rated Test Pressure and Design Condition of the Expansion Joint.
Use only designated lifting lugs when provided. Lugs are normally provided in heavy design in large size.
The table below outlines our standard design specification. For specific or non-specific enquiries, our Design Department will be pleased to guide you in your selection, upon receipt of detailed specification.

Sr. No

Size (N.B.)

Bellows (M.M)

Axial Movement mm/Convolution.

Max. No. Of Convolution./Bellows

Inch

MM

I.D.

O.D.

1

2

50

60.3

78.3

1.5

20

2

2.1/2

65

73.1

93.1

2

18

3

3

80

88.9

110.9

2

16

4

4

100

114.3

138.3

3

16

5

5

125

141.3

165.3

3

16

6

6

150

168.3

192.3

3

16

7

8

200

219.1

255.1

4.5

14

8

10

250

273.1

309.1

4.5

14

9

12

300

323.9

360

4.5

14

10

14

350

356

408

6

12

11

16

400

407

459

6

12

12

18

450

457

509

6

12

13

20

500

509

561

6

12

14

22

550

559

611

6

12

15

24

600

610

680

8

10

 

26
to
200

}

650
to
5000

}

Consult our Design Department

 

 

 
 
 
 
 
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