expansion joints - AR Thomson Group

Table II
Typical Movement Capabilities for U-type Expansion Joints (Figure 4, pg 5)
Movement Capabilities
I.D. Compression Elongation Lateral
in. mm in. mm in. mm in. mm
2 - 20 50-500 1/2 12 1/4 6 1/2 12
22 & up 550 & up 3/4 19 1/4 6 1/2 12
NOTES:
1. U-Type expansion joints can be drilled to the same specifications as
expansion joints of Table I.
Table III
Typical Tolerances for Rubber Expansion Joints (All measurements in inches)
Nominal
Pipe
Size
Exp. Jt.
I.D.
0 to 10
12 to 22
24 to 46
48 to 70
72 & Up
Exp.
Jt.
I.D. 1
± 3/16
± 1/4
± 3/8
+ 3/8
- 1/2
+ 3/8
- 5/8
Non-
Critical
Flange
O.D. 1
± 1/4
± 3/8
± 1/2
+ 3/4
- 1/2
+ 1
- 3/4
Bolt
Line
± 3/16
± 1/4
± 5/16
± 3/8
± 1/2
NOTES:
1. All diameters to be measured with a “Pi” tape.
2. All linear dimensions to be measured with a steel rule and averaged.
Face-to-Face Length “F” 2
0 to 6
± 3/16
± 3/16
± 3/16
± 1/4
± 1/4
7 to 12 14 to 18
± 3/16
± 3/16
± 3/16
± 3/8
± 3/8
± 3/16
± 3/16
+ 3/16
- 1/4
± 3/8
± 3/8
20 & Up
+ 3/16
- 1/4
+ 3/16
- 1/4
Table IV
Allowable Pipe Misalignment for Rubber Expansion Joints
NOTES:
1. Applies to single open arch expansion joints.
2. U-Type expansion joints are typically rated for full vacuum
(30” Hg) and 25 psig (1.7 bar) maximum.
Number of
Measurements
to be
Averaged
Pipe Misalignment
Nominal Pipe Size
Expansion Joint I.D. Angular (A) Lateral (L) Torsional (T)
in. mm in. mm in. mm in. mm
0 - 10 0 - 250 1/8 3 1/8 3 1/8 3
12 - 22 300 - 550 1/8 3 1/8 3 1/8 3
24 - 46 600 - 1150 3/16 5 1/4 6 1/4 6
48 - 70 1200 - 1750 1/4 6 3/8 10 3/8 10
72 & Up 1800 & up 1/4 6 3/8 10 3/8 10
± 1/4
± 3/8
± 3/8
2. Torsional misalignment “T” is as measured at bolt circle of flanges.
3. Misalignments are for ± conditions.
4
4
4
6
6
17