Comflex® Rubber Expansion Joints Engineering Guide

Installation and Maintenance
for all Solid Rubber Flanges for Types 40, 42, 58, 59, 63
Extract from documentation required by the Technical
Inspectorate for type 40 large expansion joints (cooling
water system in a nuclear power station).
1. Identification
1.1 Delivery documentation and expansion joint
identification marking must correspond.
1.2 Identification marking on the rubber expansion joint
a) On the expansion joint collar, above
the embossed name plate.
XX
XX/XX
Production No. month/year
b) Name plate James Walker Townson expansion
joint made by Continental
Type 40 xx/x
xxx bar
Material/inserts working operating pressure
DN xxxx/xx
Nominal width/flange
build length xxx
Standard build length*
* Attention: The installation length (mounting) can
vary! Check pre-restraint!
3. Storage
(see DIN 7716)
“Guidelines for the storage of rubber parts”
Rubber expansion joint must be stored stress-free without
deformations and kinks. Rubber expansion joints must
be stored upright on the flanges (to avoid the risk of
crushing!).
3.1 Storage room
The storage room should be cool, dry and dustfree
and moderately ventilated.
3.2 Oxygen and ozone
Protect rubber parts from draughts, cover in case
of emergency. Do not operate ozone-producing
devices such as electric motors, fluorescent light
sources etc. in the store room.
3.3 Co-storage
Do not store with solvents, fuels, chemicals and
similar items.
2. Transport
2.1 Packaging Package parts.
Note “TOP” at the top and “cable or lifting hook”
steel backing rings (with bracing) and the rubber
expansion joint flanges must remain fastened until
final mounting. The relatively light rubber part is
bonded to heavy metal flanges - avoid excessive
loading of the rubber part.
2.2 Tools
No sharp-edged tools, wire cables, chains or lifting
hooks (danger of damage to rubber).
2.3 Lifting and moving
Always lift both steel flanges simultaneously.
Shackle at both sides or place padded tie-bars
through the expansion joint or lift both sides.
2.4 Ground level transportation
Move flanges by rolling.
4. Installation
4.1 Pipes
4.1.1 Check dimensions of planned installation gaps.
The total installation discrepancies in the piping
and operating movements must not exceed the
maximum movements specified in the design
layout.
4.1.2 Clean mating flanges, remove anti-corrosion paint
from surfaces.
4.1.3 Mating flanges must be smooth, flat and free from
burrs.
4.1.4 Do not subject the expansion joint to stress. Bolt
holes must be in alignment.
4.2 Bellows
The bellows must not be painted or insulated.
To order or get further details, call your local contact 57 shown on rear cover or listed at www.jameswalker.biz 57