Bellows Short Style
"Matchless" metal expansion joints are commonly used to absorb the movements in piping caused by thermal changes. UNA-FLEX has designed the latest technology to help produce a premium product produced from fully annealed stainless steel sheet rolled into a tube and seam welded.
Short Style:
- Size (in.): 2 to 144
- PSI: 50 to 300
- Overall length: 8 to 5200
- Force (lbs/in.): 180 to 9430
- Movement (in): 0.8 to 2.0
- Lateral movement (in.): 0.1 to0.08
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Short Style Specification Chart
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SLP - Short Low Pressure
SMP - Short Medium Pressure
SHP - Short High Pressure
DS - Duct Short
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Style
44 & 66
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Style 22
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Axial
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Lateral
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Size
(In.)
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Series
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PSI
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O.A.L.
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Weight
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O.A.L.
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Weight
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Force
(lbs./in.)
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Move-
ment
(in.)
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Force
(lbs./in.)
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Move-
ment
(in.)
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2
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6
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6
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0.8
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0.1
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2-1/2
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6
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7
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0.8
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0.1
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3
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6
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9
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0.8
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0.1
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3-1/2
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6
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9
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0.8
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0.1
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4
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7
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9
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0.8
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0.1
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5
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8
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10
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1.3
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0.1
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6
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8
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10
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1.3
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8
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8
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10
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1.6
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10
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8
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10
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1.6
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12
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9
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10
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1.6
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0.1
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14
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9
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12
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1.6
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0.1
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16
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9
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12
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1.6
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0.1
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18
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10
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12
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1.8
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0.1
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20
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10
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14
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1.8
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0.1
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22
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10
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14
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1.8
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0.1
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24
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11
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14
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1.8
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0.1
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DS
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50
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11
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14
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1.8
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0.2
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DS
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50
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11
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14
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2.0
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0.2
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DS
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25
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11
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14
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2.0
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0.2
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DS
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25
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11
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14
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2.0
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0.1
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DS
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15
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11
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14
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2.0
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4610000
12100000
18400000
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0.1
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DS
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15
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11
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14
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2.0
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19500000
21000500
25000100
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0.08
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Design Movements based on 80% axial compression, 20% extension and total lateral offset.
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Unaflex Matchless Metal Bellows Expansion Joints Data
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- Metal expansion joints are primarily used to absorb movements in piping caused by thermal changes. Our designs incorporate the latest technology to produce a premium product.
- Unaflex "Matchless" expansion joint bellows are produced from fully annealed stainless steel sheet rolled into a tube and seam welded.
- Service: Units are capable of handling Vacuum to 300 PSI.
- Standard bellows: 321 stainless steel. Other alloys are available to withstand your toughest applications.
- Standard fittings: welding nipples, fixed and floating flanges.
- Standard sizes: 2" through 144".
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Pressure Thrust
When a bellows is pressurized, it reacts causing a load equal to its effective area X working pressure along its longitudinal axis. These loads must be considered when designing the system arrangement and appropriate anchors.
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Size
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Sq. In.
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Size
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Sq. In.
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Size
|
Sq. In.
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2
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6.3
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18
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290
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52
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2290
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2-1/2
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9.6
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20
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354
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54
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2460
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3
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12.0
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22
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426
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60
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3025
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4
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20
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24
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500
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66
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3635
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5
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30.0
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30
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775
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72
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4300
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6
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43.0
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36
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1090
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84
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5800
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8
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72.0
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40
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1350
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96
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7550
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10
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110
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42
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1470
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108
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9510
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12
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150
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46
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1775
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126
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13200
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14
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180
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48
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1940
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132
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14110
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16
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234
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50
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2125
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144
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16750
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Temperature:
Elevated temperatures reduce both rated movement and pressure capabilities.
To compensate multiply both rated movement and rated pressure by the temperature compensating factor shown in the chart below.
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Temperature °F
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Temperature Compensating Factor
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Temperature °F
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Temperature Compensating Factor
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Room Temp.
200
300
400
500
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1.00
.86
.80
.78
.77
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600
700
800
901
1000
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.74
.70
.66
.62
.60
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