Expansion Joint Guide Module 5 - Universal ... - BOA Group

Reduction factors 1) for pressure [K P ]
and expansion capacity [K ]
Temperature °C K P K
-10...20
50
100
150
200
250
300
350
400
1.00
0.92
0.87
0.83
0.79
0.74
0.67
0.60
0.53
1)
linear interpolation for intermediate values
1.00
0.97
0.94
0.92
0.90
0.88
0.86
0.85
0.84 Table Table 2 2
2.3 Universal expansion joints
2.3.1 Universal expansion joints with flanges
2.3.1.1 Type UFS
Expansion joints of type UFS are equipped with flanges firmly welded onto the bellows.
As a standard, expansion joints of type UFS are manufactured in nominal diameters from DN 40 to 1000 and in
pressure ranges of PN 6, 10, 16 and 25.
As a standard, flanges are made of carbon steel and are primer coated.
The variant with particularly large lateral movement (Design II) is equipped with an intermediate tube made of carbon steel.
The design type I or II is indicated in the last column of the standard tables (see fig.).
Design I
Universal expansion joint with integrated intermediate tube
Design II
Universal expansion joint with attached intermediate tube
2.3.1.2 Type UFB
Expansion joints of type UFB are equipped with movable, collared flanges. The inside medium is only in contact with the austenitic
bellows material.
As a standard, expansion joints of type UFB are manufactured in nominal diameters from DN 40 until DN 300 mm and in pressure
ranges of PN 6, 10, 16 and 25.
As a standard, flanges are made of carbon steel and are primer coated.
The variant with particularly large lateral movement (Design II) is equipped with an intermediate tube made of carbon steel.
The design type I or II is indicated in the last column of the standard tables (see fig.).
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