Metal Bellows Expansion Joints

Construction:   Produced from fully annealed Stainless Steel sheet rolled into a tube and seam-welded.
Service:  Primarily used to absorb movements in piping caused by thermal changes. Units capable of handling vacuum to 300 psi.
Standard Fittings:  Welding nipples, fixed and floating flanges.
Standard Sizes:  2″ – 144″
Temperature:  200-1500°F

SIZE (Inches)
PRESSURE (psi)
OVERALL LENGTH (Inches)
2
50-300
6
2-1/2
50-300
7
3
50-300
9
3-1/2
50-300
9
4
50-300
9
5
50-300
10
6
50-300
10
8
50-300
10
10
50-300
10
12
50-300
10
14
50-300
12
16
50-300
12
18
50-300
12
20
50-300
14
22
50-300
14
24
50-300
14
30
50
14
36
50
14
40
50
14
42
50
14
46
50
14
48
50
14
50
25
14
52
25
14
54
25
14
60
25
14
66
25
14
72
25
14
84
15
14
96
15
14
108
15
14
126
15
14
132
15
14
144
15
14

Metal Retaining Rings Disclosure
Retaining rings must be used with all elasto-metric expansion joints. They are installed behind and directly against the inner face of each of the rubber flanges at both ends of the joint. They provide a metal surface to distribute the bolting pressure around the flange and prevent the bolts from damaging the rubber flange when tightened. Retaining rings are normally made of 1020 steel with corrosion-resistant coating. Galvanized or stainless rings are available on special order.