Comflex® Rubber Expansion Joints Engineering Guide

Installation and Maintenance Information for Type 64
Storage
The expansion joints should be stored under clean and dry
conditions and must be protected against mechanical
damage. Do not unpack the expansion joint until ready
for installation. Protective covers should be left on as long
as possible. Transportation support devices must not be
removed until the expansion joint is in position in the pipeline
system.
Installation
Do not start installation until all work on the ducting and
flanges has been completed and all anchors and supports
have been fitted. This serves to prevent any damage to the
expansion joint through welding sparks, sharp objects etc.
and ensure that the expansion joint is not over-stressed.
The bellows must not be painted or insulated.
The expansion joints are manufactured from highly flexible
materials. The durability depends on careful and correct
installation. Sharp edges and folds must be avoided and care
must be taken when lifting expansion joints during installation.
It is recommended to use a supporting plate or an internal
frame for lifting purposes. Preferably, a expansion joint should
be pre-assembled with backing flanges and internal sleeve
(if included in the delivery) on the ground before lifting.
Ducting flanges / tolerances
If the delivery includes ducting flanges, backing flanges or
other steel parts, check that the measurements correspond
with the drawings and that bolt holes are arranged
symmetrical in each flange.
The bolts must be retightened 24 hours after installation of the
expansion joint.
Plates for the assembly of expansion joints with welding
flanges.
Bolt torque
Backing flanges
bolts
40 x 10
M10
50 x 10
M12
60 x 10
M12
60 x 12
M16
NBR
60 Nm
70 Nm
80 Nm
80 Nm
EPDM
60 Nm
80 Nm
80 Nm
80 Nm
VITON ®
80 Nm
80 Nm
80 Nm
Spacer for Install Rubber Expansion Joints
with Slip-on Flanges
DN 32
DN 40
DN 50
DN 65
DN 80
DN 100
DN 125
DN 150
DN 175
DN 200
DN 250
DN 300
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
32
82
40
92
50
107
65
127
80
142
100
162
125
192
150
218
175
248
200
273
250
328
300
378
To order or get further details, call your local contact 61 shown on rear cover or listed at www.jameswalker.biz 61